Document:

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                                                                   EXHIBIT 10.25

                    WAIVER AGREEMENT AND AMENDMENT NO. 10 TO
               CREDIT AGREEMENT AND OTHER LOAN AND LEASE DOCUMENTS

     THIS WAIVER AGREEMENT AND AMENDMENT NO. 10 TO CREDIT AGREEMENT AND OTHER
LOAN AND LEASE DOCUMENTS ("this Amendment") is dated this 26th day of April,
2001, to be effective as of March 31, 2001, by and among the BANKS listed on the
signature pages hereof ("Banks"), BANK ONE, COLORADO, N.A., as Agent ("Agent"),
BANC ONE LEASING CORPORATION, as Lessor ("Banc One Leasing"), ANALYTICAL
SURVEYS, INC., as Borrower and Lessee ("Borrower"), MSE CORPORATION, an Indiana
corporation, as Guarantor and lease guarantor ("MSE"), ASI LANDMARK, INC., a
Colorado corporation, as Guarantor and lease guarantor ("Landmark"), ASI OF
PUERTO RICO, INC., a Puerto Rico corporation, as Guarantor ("Puerto Rico"), MSE
HOLDING COMPANY, an Indiana corporation, as Guarantor ("MSE Holding"), MSE LLC,
an Indiana limited liability company, as Guarantor ("MSE LLC"), CARTOTECH, INC.,
a Texas corporation, as lease guarantor ("Cartotech"), INTELLIGRAPHICS
INTERNATIONAL, INC. ALSO KNOWN AS ASI TECHNOLOGIES (INTELLIGRAPHICS), a
Wisconsin corporation, as lease guarantor ("Intelligraphics"), and SURVEY
HOLDINGS, INC., a Texas corporation, as Guarantor and lease guarantor
("Holdings" which together with MSE, Landmark, Puerto Rico, MSE Holding, MSE
LLC, Cartotech, Intelligraphics and Holdings may be collectively referred to as
"Guarantors");

                                  WITNESSETH:

     WHEREAS, Borrower, Banks and Agent are parties to a Credit Agreement dated
as of June 3, 1998, as amended by Amendment No. 1 through Amendment No. 5,
Waiver Agreement and Amendment No. 6 to Credit Agreement and Other Loan and
Lease Documents, Waiver Agreement and Amendment No. 7 to Credit Agreement and
Other Loan and Lease Documents, Waiver Agreement and Amendment No. 8 to Credit
Agreement and Other Loan and Lease Documents and Waiver Agreement and Amendment
No. 9 to Credit Agreement and Other Loan and Lease Documents and (as so amended,
the "Credit Agreement");

     WHEREAS, Borrower and Banc One Leasing are parties to a Master Lease
Agreement dated June 8, 1993 (the "Master Lease") and various lease schedules
pursuant thereto (the Master Lease together with all leases and lease schedules
executed and delivered by Borrower to Banc One Leasing under the Master Lease
may be referred to as the "Leases" and any of which may be referred to
individually by the words "Lease No." and its lease schedule number, such as
Lease No. 1-94447);

     WHEREAS, Borrower and/or certain Guarantors are parties to various
equipment leases with The Fifth Third Bank of Central Indiana ("Fifth Third")
which leases (collectively, the "5th/3rd Leases") are more particularly
identified on SCHEDULE I to this Amendment;

     WHEREAS, pursuant to the Credit Agreement, Banks have extended to Borrower
the following secured credit facilities (i) revolving lines of credit, as
provided in Section 2.1 of the Credit Agreement (collectively, the "Revolving
Loans") and (ii) term loans (collectively, the "Term Loan") as follows:

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     (a)  Revolving Loans Principal Balances as of March 31, 2001:

          (i)       National City          $ 1,148,867.33
          (ii)      KeyBank                $ 1,148,867.33
          (iii)     Fifth Third            $ 2,297,734.66
          (iv)      Bank One               $ 2,504,530.68

     (b)  Term Loan Principal Balances as of March 31, 2001:

          (i)       National City          $ 2,027,928.97
          (ii)      KeyBank                $ 2,027,928.97
          (iii)     Fifth Third            $ 4,055,857.96
          (iv)      Bank One               $ 4,420,885.10

     WHEREAS, to secure the Obligations, Borrower executed and delivered to the
Agent, among other things, a Security Agreement and Assignment dated as of June
3, 1998 (as amended to date, the "Security Agreement"); and a Pledge and
Security Agreement dated as of June 3, 1998, as amended by Amendment No. 1 to
Pledge and Security Agreement dated June 26, 1998 (the "Pledge Agreement");

     WHEREAS, to further secure the Obligations, MSE, MSE Holding, MSE LLC,
Landmark, and Puerto Rico each executed and delivered to Agent a Guaranty of the
Obligations;

     WHEREAS, to secure each of their respective Guaranties and to further
secure the Obligations, MSE, MSE Holding, MSE LLC, Landmark, and Puerto Rico
each executed and delivered to Agent a Security Agreement and Assignment;

     WHEREAS, to further secure the Leases, MSE, Landmark, Holdings, Cartotech
and Intelligraphics each executed and delivered to Banc One Leasing a guaranty
of the Leases;

     WHEREAS, Borrower is to make a regularly scheduled quarterly principal
payment in the amount of $1,225,000.00 and a mandatory prepayment of principal
in the amount of $5,225,000.00, each of which are to be applied to the Term Loan
and are due April 1, 2001;

     WHEREAS, Borrower and Guarantors have requested that Banks waive existing
Events of Default, if any, suspend Borrower's and Guarantors' compliance with
certain covenants and defer the obligation to make principal payments on the
Term Loan, and make other modifications of the Credit Agreement;

     WHEREAS, Banks have agreed to waive existing Events of Default, temporarily
suspend compliance with certain covenants, defer the obligation to make
principal payments with respect to the Term Loan and make other modifications of
the Credit Agreement, subject to the terms and upon the conditions hereinafter
set forth;

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                                    AGREEMENT

     NOW, THEREFORE, in consideration of the foregoing recitals, the mutual
covenants and agreements contained herein and the acts to be performed
hereunder, and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged by each of the parties, the parties
hereby jointly and severally agree as follows:

     1.   Incorporation of Recitals/Definitions. The foregoing recitals and
definitions set forth above are incorporated herein and made a part hereof.
Terms which are defined in the Credit Agreement and which are not otherwise
defined in this Amendment shall have the meanings ascribed to them in the Credit
Agreement.

     2.   Waiver.

          (a)  Acknowledgement of Default. Borrower and Guarantors acknowledge
     that as of the date hereof, Borrower has not paid, and will not be able to
     timely pay, the quarterly installment of the Term Loan payable on April 1,
     2001 in the amount of One Million Two Hundred Twenty-Five Thousand Dollars
     ($1,225,000) required pursuant to Section 2.6(b) of the Credit Agreement
     and the Five Million Two Hundred Twenty-Five Thousand Dollar ($5,225,000)
     Mandatory Repayment and the balance (being $57,601) of the Two Million Four
     Hundred Fifty Thousand Dollar ($2,450,000) Mandatory Repayment required
     pursuant to Section 2.6(d)(v)(y) and (z) of the Credit Agreement, and that
     each such failure, until waived by the Banks, would constitute an Event of
     Default under the Credit Agreement (all such failures being collectively
     called the "Monetary Defaults"). Borrower and Guarantors further
     acknowledge that Borrower, as of the date of this Amendment, is not in
     compliance with the financial covenants set forth in Sections 9.3(i) and
     9.17(b) and (c) of the Credit Agreement, each as amended by the Ninth
     Amendment, and that each such non-compliance, until waived by the Banks and
     Banc One Leasing, constitutes an Event of Default under the Credit
     Agreement and the Master Lease (all such non-compliance being collectively
     referred to as the "Financial Covenant Defaults").

          (b)  Waiver. Banks hereby waive the Financial Covenant Defaults and,
     to the extent not waived by the deletion of former Section 9.3(i) of the
     Credit Agreement, as amended by the Ninth Amendment, and by the
     modification of the payment schedule with respect to the Term Loan pursuant
     to Sections 3 (j) and (k) of this Amendment, the Monetary Defaults, all
     such waivers being effective through April 27, 2001, and, upon receipt, on
     or prior to April 27, 2001, of Five Million One Hundred Thousand Dollars
     ($5,100,000) (the "Banks' Sale Proceeds") from the proceeds of the sale of
     certain of Borrower's and Guarantors' assets located at or associated with
     Borrower's office at Colorado Springs, Colorado pursuant to an agreement
     with Sanborn Colorado, LLC (the "Sanborn Sale Agreement") in an amount not
     more than Eight Million Four Hundred Six Thousand Dollars ($8,406,000) (the
     "Colorado Proceeds"), such waivers being extended and effective through May
     31, 2001. In the event Borrower delivers to Agent, with a copy to each
     Bank, a commitment to provide to Borrower a Replacement Line (as
     hereinafter defined), in form and

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     substance reasonably acceptable to Agent and Banks (a "Replacement Line
     Commitment"), such waiver will be extended and effective through June 30,
     2001. The Banks and, subject to receipt by Banc One Leasing of the Colorado
     Lease Amount (as defined in Section 9.19 of the Credit Agreement, as hereby
     amended) of the Colorado Proceeds (the "Lease Portion"), Banc One Leasing
     also hereby waives compliance by Borrower with Sections 5.2(a), 9.3 and
     9.17 of the Credit Agreement, as amended by the Ninth Amendment, and
     Section 18 of the Master Lease. Banc One Leasing hereby waives any default
     or event of default under the Master Lease or the Leases by reason of the
     Financial Covenant Defaults and the Monetary Defaults, such waivers
     effective through April 27, 2001 and, upon receipt of the Colorado Lease
     Amount, through May 31, 2001. In the event Borrower delivers to Agent, with
     a copy to each Bank, a Replacement Line Commitment, Banc One Leasing agrees
     that such waiver will be extended and effective through June 30, 2001.
     Notwithstanding any provision of the Credit Agreement or this Amendment to
     the contrary, on or prior to May 31, 2001, Borrower and Banks shall
     negotiate, and agree in writing to, financial covenants, reasonably
     acceptable to all parties, which covenants shall be effective from May 31,
     2001 through the date upon which the Interest Bearing Term Loan (as such
     term is defined in Section 1.1 of the Credit Agreement as hereby amended)
     is paid in full (the "Post 5/31 Covenants") and shall replace in their
     entirety the financial covenants of Borrower and Guarantors set forth in
     Sections 5.2(a), 9.3 and 9.1 of the Credit Agreement, as amended by the
     Ninth Amendment. Upon the Post 5/31 Covenants becoming effective, the
     waivers herein by the Banks, Fifth Third and Banc One Leasing shall be
     permanent without further action by any party. Fifth Third hereby waives
     any default or event of default under each of the 5th/3rd Leases which has
     occurred or might be deemed to have occurred by reason of the occurrence on
     or prior to April 27, 2001, of an Event of Default under the Agreement or
     the Leases.

          (c)  Effect of Waiver. The waivers granted pursuant to Subsection (b)
     of this Section 2 are not and shall not be deemed to be a waiver by Banks
     of any other Defaults or Events of Default which may now or hereafter
     exist.

          (d)  Consent to Sale - Release of Security Interests. Banks and Agent
     hereby consent to the Sanborn Sale Agreement and the sale by Borrowers and
     Guarantors of substantially all of the personal property associated with
     Borrower's Colorado Springs, Colorado Office to Sanborn Colorado, LLC
     pursuant thereto, and agree to release and terminate all liens and security
     interests held or asserted by them in and to such personal property,
     subject only to receipt by the Agent of the Banks' Sale Proceeds.

     3.   Amendments to Credit Agreement.

          (a)  The following new definitions are inserted in Section 1.1 of the
     Credit Agreement such that all definitions therein are in alphabetical
     order:

               "Change of Control" means the transfer, after the
          effective date of the Tenth Amendment, directly or indirectly,
          in one or a series of transfers, to: (i)

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          any Person or Persons of capital stock of Borrower which
          results in such Person or Persons owning fifty percent (50.0%)
          or more of the capital stock of the Borrower following such
          transfer; or (ii) any Person or Persons of all or a
          substantial portion of the assets (including Borrower's
          ownership interest in any Subsidiary of Borrower) of Borrower
          or any Subsidiary of Borrower, other than the transfer to
          Sanborn Colorado, LLC of the assets associated with Borrower's
          Colorado Springs, Colorado office pursuant to the terms of the
          Sanborn Sale Agreement.

               "Initial Subordination Requirements" means: (i) on or
          before April 27, 2001, Borrower has paid to Agent for the
          benefit of Banks: (A) the first Monthly Renewal Fee pursuant
          to Section 9.9; (B) from the Banks' Sale Proceeds, Two Million
          Seven Hundred Thousand Dollars ($2,700,000), to be applied as
          a principal payment on the Revolving Loans and a permanent
          reduction of the Revolving Loan Commitment; and (C) from the
          Banks' Sale Proceeds, Two Million Four Hundred Thousand
          Dollars ($2,400,000) as a principal payment on the Interest
          Bearing Term Loan, to be applied in the inverse order of
          maturity; (ii) on or before May 31, 2001, or, in the event
          that Borrower has delivered to Agent and Banks, on or before
          May 31, 2001, a Replacement Line Commitment, then June 30,
          2001, Borrower has paid to Agent for the benefit of Banks:
          (A) the second Monthly Renewal Fee pursuant to Section 9.9;
          and (B) the remaining unpaid balance of the Revolving Loans
          together with all accrued interest thereon through the date of
          payment thereof.

               "Interest Bearing Term Loan" means the funds advanced by
          the Banks to Borrower pursuant to the Term Loan Commitment and
          evidenced by the Interest Bearing Term Note.

               "Interest Bearing Term Loan Record" means a Record with
          respect to an Interest Bearing Term Loan.

               "Interest Bearing Term Loan Scheduled Maturity Date"
          means December 31, 2001.

               "Interest Bearing Term Note" means the promissory notes
          in the initial aggregate principal amount of $7,532,601
          evidencing the interest bearing portion of the Term Loan, made
          by the Borrower and payable to the order of the Banks,
          substantially in the form of Exhibit A-2(a) hereto, as the
          same may be supplemented, modified, amended or restated from
          time to time in the manner provided herein.

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               "Non-Interest Bearing Term Loan" means the funds advanced
          by the Banks to Borrower pursuant to the Term Loan Commitment
          and evidenced by the Non-Interest Bearing Term Note.

               "Non-Interest Bearing Term Loan Record" means a Record
          with respect to an Non-Interest Bearing Term Loan.

               "Non-Interest Bearing Term Loan Scheduled Maturity Date"
          means October 1, 2002.

               "Non-interest Bearing Term Note" means the promissory
          notes in the initial aggregate principal amount of $5,000,000
          evidencing the non-interest bearing portion of the Term Loan,
          made by the Borrower and payable to the order of the Banks,
          substantially in the form of Exhibit A-2(b), as the same may
          be supplemented, modified, amended or restated from time to
          time in the manner provided herein.

               "Replacement Lender" means, collectively, any lender or
          group of lenders and their agent which extends to Borrower a
          Replacement Line.

               "Replacement Line" means a loan or loans or credit
          facilities in a maximum principal amount of not more than
          $4,500,000 and which refinances the Revolving Loans.

               "Tenth Amendment" means the Waiver Agreement and
          Amendment No. 10 to Credit Agreement and Other Loan and Lease
          Documents dated as of March 31, 2001 by and among Borrower,
          certain Subsidiaries or Affiliates of Borrower, Banc One
          Leasing Corporation, Banks and Agent.

          (b)  Applicable Margin. The definition of the term "Applicable Margin"
     in Section 1.1 of the Credit Agreement is hereby amended in its entirety to
     read as follows:

               "Applicable Margin" means, with respect to: (i) Revolving
          Loans, 2.00%; and (ii) Interest Bearing Term Loan, 1.00%.

          (c)  Interim Period. The definition of the term "Interim Period" in
     Section 1.1 of the Credit Agreement is hereby amended in its entirety to
     read as follows:

               "Interim Period" means the period from the effective date
          of the Tenth Amendment to and including October 1, 2002.

          (d)  Revolving Loans Commitments. The definition of the term
     "Revolving Loans Commitments" in Section 1.1 of the Credit Agreement is
     hereby amended in its entirety to read as follows:

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               "Revolving Loans Commitment" means the commitment of the Banks to
          Advance Revolving Loans to the Borrower from time to time in the
          aggregate amount of (i) from the effective date of the Tenth Amendment
          until the earlier of April 27, 2001 or the date of Borrower's or any
          Guarantor's receipt of the Colorado Proceeds, Seven Million One
          Hundred Thousand Dollars ($7,100,000); (ii) from and after the earlier
          of April 27, 2001 or the date of Borrower's or any Guarantor's receipt
          of the Colorado Proceeds until the earlier of May 31, 2001, or, in the
          event that Borrower has delivered to Agent and Banks, on or before May
          31, 2001, then June 30, 2001, or the date of funding of the
          Replacement Line, Four Million Four Hundred Thousand Dollars
          ($4,400,000); and (iii) from and after the earlier of May 31, 2001,
          or, in the event that Borrower delivers to Agent and Banks, on or
          before May 31, 2001, a Replacement Line Commitment, then June 30,
          2001, or the date of funding of the Replacement Line, Zero Dollars
          ($0); provide however, notwithstanding any provision of this Agreement
          or the Revolving Note to the contrary, Banks shall not make any
          further Advance after the effective date of the Tenth Amendment.

          (e)  Revolving Loans Scheduled Maturity Date. The definition of the
     term "Revolving Loans Scheduled Maturity Date" in Section 1.1 of the Credit
     Agreement is hereby amended in its entirety to read as follows:

               "Revolving Loans Scheduled Maturity Date" means May 31,
          2001, or, in the event that Borrower delivers to Agent and
          Banks, on or before May 31, 2001, a Replacement Line
          Commitment, then June 30, 2001.

          (f)  Revolving Note. The definition of the term "Revolving Note" in
     Section 1.1 of the Credit Agreement is hereby amended in its entirety to
     read as follows:

               "Revolving Note" means the promissory notes in the
          aggregate principal amount of $7,100,000 made by the Borrower
          and payable to the order of the Banks, substantially in the
          form of Exhibit A-1 hereto, as the same may be supplemented,
          modified, amended or restated from time to time in the manner
          provided herein.

          (g)  Term Loan. The definition of the term "Term Loan" in Section
     1.1 of the Credit Agreement is hereby amended in its entirety to read as
     follows:

               "Term Loan" means the funds advanced by the Banks to
          Borrower pursuant to the Term Loan Commitment and evidenced by
          the Interest Bearing Term Note and the Non-Interest Bearing
          Term Note.

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          (h)  Term Loan Scheduled Maturity Date. The definition of the term
     "Term Loan Scheduled Maturity Date" in Section 1.1 of the Credit Agreement
     is hereby amended in its entirety to read as follows:

               "Term Loan Scheduled Maturity Date" means the Interest
          Bearing Term Loan Scheduled Maturity Date or the Non-Interest
          Bearing Term Loan Scheduled Maturity Date, as the case may be.

          (i)  Term Note. The definition of the term "Term Note" in Section 1.1
     of the Credit Agreement is hereby amended in its entirety to read as
     follows:

               "Term Note" means the Interest Bearing Term Note or the
          Non-Interest Bearing Term Note, as the case may be, or in the
          plural form, both the Interest Bearing Term Note and the
          Non-Interest Bearing Term Note.

          (j)  Restructure of Term Loan Payment. Section 2.6(b) is hereby
     amended in its entirety to read as follows:

               (b)  Payment of Term Loan Notwithstanding any provision of
               this Agreement or any Term Note to the contrary, the
               Borrower will repay: (i) the Interest Bearing Term Loan
               in full on or before the earlier of: (A) December 31,
               2001; or (B) the date upon which a Change of Control
               occurs; and (ii) will repay the Non-Interest Bearing
               Term Loan in full on or before October 1, 2002.
               Quarterly installment payments of principal of the Term
               Loan are no longer required to be made, effective as of
               March 31, 2001.

          (k)  Mandatory Prepayments. Section 2.6(d) of the Credit Agreement is
     hereby amended in its entirety to read as follows:

               (d)  Mandatory Repayment Notwithstanding any provision of
               this Agreement to contrary:

                    (i)  The Borrower will repay the Loans in full on
                    demand upon the acceleration of the due date of any
                    of the Loans by the Agent pursuant to Article VI
                    hereof.

                    (ii) Subject to the terms of any intercreditor
                    agreement among the Replacement Lender, Banks and
                    the Borrower, the Borrower shall pay to the Agent
                    Net Proceeds within not more than five (5) Business
                    Days after the Borrower shall receive Net Proceeds
                    from (x) Dispositions, (y) any equity securities
                    issuance or sale (excepting any such issuance or
                    sale in which the Interest Bearing Term Loan will be
                    paid in

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                    full and excepting the first $3,500,000 of any such
                    issuance or sale); or (z) insurance recoveries and
                    condemnation and eminent domain awards. Collateral
                    shall be released from the liens of the Collateral
                    Documents upon any Disposition of such Collateral,
                    provided that (i) no Event of Default has occurred
                    and (ii) the Borrower shall have made the mandatory
                    repayment (from the Net Proceeds and not as an
                    additional payment) required under the terms of this
                    Section 2.6. All payments made pursuant to this
                    Section shall be first applied to interest bearing
                    loans before being applied to the Non-Interest
                    Bearing Term Loan.

                    (iii) The Borrower shall, upon demand by Agent, pay
                    to the Agent as a principal reduction of the
                    Revolving Loan the amount by which the principal
                    balance then outstanding on the Revolving Loan at
                    any time exceeds the Borrowing Base.

                    (iv)  In addition to all other payments required to
                    be paid under the terms of this Agreement, the
                    Borrower shall pay to Agent (w) on or before April
                    27, 2001, as a principal payment on the Interest
                    Bearing Term Loan, to be applied in the inverse
                    order of maturity, from the Banks' Sale Proceeds,
                    Two Million Four Hundred Thousand Dollars
                    ($2,400,000); (x) from the Banks' Sale Proceeds, on
                    or before April 27, 2001, as a permanent reduction
                    of the Revolving Loans and the Revolving Loan
                    Commitment, Two Million Seven Hundred Thousand
                    Dollars ($2,700,000); (y) on or before May 31, 2001,
                    or, in the event that Borrower delivers to Agent and
                    Banks, on or before May 31, 2001, a Replacement Line
                    Commitment, then June 30, 2001, the entire unpaid
                    principal sum of and all accrued interest upon the
                    Revolving Loans; and (z) upon a Change in Control,
                    the entire unpaid principal sum of and all accrued
                    interest upon the Interest Bearing Term Loan.

          (l)  Article IX of the Credit Agreement is hereby amended in its
     entirety to read as follows:

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                                   ARTICLE IX

                             ADDITIONAL PROVISIONS

     9.1  Controlling Effect. In the event of any conflict between a provision
of Article IX and any other provision of this Agreement, the provisions of
Article IX shall control.

     9.2  Interest Payments. The principal balance of the Revolving Loans and
the Interest Bearing Term Loan outstanding from time to time shall bear interest
and be payable at a variable rate of interest equal to the Prime Rate plus the
Applicable Margin. Interest shall be due and payable monthly in arrears on the
first day of each month.

     9.3  Revolving Loan Advances During Interim Period. From and after the
effective date of the Tenth Amendment, Banks shall make no further Advances
under the Revolving Loan.

     9.4  Rolling Cash Flow Projections. Within ten (10) Business Days of the
end of each calendar month, Borrower shall provide to Agent, with a copy for
each Bank, a prospective sixteen (16) week cash flow projection in form and
detail acceptable to Banks for the sixteen (16) week period commencing with the
first week of the month in which such cash flow projection is required to be
delivered to Agent ("Rolling Cash Flow Projection").

     9.5  Deferral Fee. As additional compensation for extension of the due date
of the principal payments due January 1, 2001, pursuant to Section 2.6(d)(v)(y)
of this Agreement, as amended by the Eighth Amendment, in addition to interest
and all other fees as herein provided, Borrower shall pay to Banks a fee of one
hundred fifty (150) basis points per annum (the "Deferral Fee"), prorated for
any partial year, on the principal balance of the Revolving Loans and the Term
Loan outstanding from time to time during the period from January 1, 2001
through April 27, 2001. Such Deferral Fee shall be Ninety-Nine Thousand Eleven
and 70/100 Dollars ($99,011.70) for the period from January 1 through April 27,
2001 and shall be due and payable in full on April 27, 2001. For the purposes of
this Agreement, one hundred (100) basis points equal one percent (1.0%).

     9.6  Agent's Fee. Notwithstanding the letter agreement by and between
Borrower and Agent dated October 8, 1998, Borrower shall pay to Agent an annual
fee equal to twelve and one-half (12.5) basis points (the "Agent's Fee") on the
total principal sum of: (i) the Term Loan, (ii) the Revolving Loan Commitments,
if any, each as at October 15th of each year.

     9.7  Financial Information and Reporting. In addition to all other
financial statements and reports required by the terms of this Agreement for so
long as any portion of the Revolving Loans remains unpaid Borrower shall: (a)
for so long as the Revolving Loans remain unpaid, provide Agent with a Borrowing
Base Certificate setting forth each component of the Borrowing Base and an
accounts receivable

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aging report ("A/R Aging"), each as of Friday of each week, such Borrowing Base
Certificate to be received by Banks not later than Wednesday of the following
week; (b) deliver to Agent such invoices, contracts and other documentation
supporting Borrower's computation of the Borrowing Base, as Agent may reasonably
request; (c) monthly, by the twenty-fifth day of the following month, a
consolidated unaudited balance sheet and income statement prepared in accordance
with GAAP, a Borrowing Base Certificate setting forth each component of the
Borrowing Base as of the last day of such month (but only if weekly Borrowing
Base Certificates are not being provided), an A/R Aging and a contract status
report ("Status Report"). Furthermore, in addition to all other financial
statements and reports required by the terms of this Agreement for so long as
any portion of the Revolving Loans and/or the Interest Bearing Term Loan and/or
the Leases remains unpaid Borrower shall: (a) effective for the week ending
April 6, 2001, initiate and conduct a weekly telephone conference with a
representative of Borrower, Agent and, at the option of each of the Banks,
Banks; (b) on Wednesday of each week, beginning April 4, 2001, a cash flow
report for the preceding calendar week comparing actual cash flow results to
Borrower's then current Rolling Cash Flow Projection; and (c) monthly, by the
twenty-fifth day of the following month, a consolidated unaudited balance sheet
and income statement prepared in accordance with GAAP, an A/R Aging and a Status
Report.

     9.8  Independent Consultant. During the Interim Period, Borrower shall
continue to employ a financial management consulting firm ("Financial Management
Consultant") acceptable to Banks. Borrower's current Financial Management
Consultant, Starshak & Associates, Inc., is acceptable to the Banks.

     9.9  Renewal Fee. Effective April 1, 2001, Borrower shall pay to Banks on
the first day of each month a fee ("Monthly Renewal Fee") equal to one-twelfth
of fifty (50) basis points on the total principal sum of the Interest Bearing
Term Loan and the Revolving Loans. The Monthly Renewal Fee effective April 1,
2001 shall be Six Thousand Ninety-Seven Dollars ($6,097) and shall be adjusted
upon payment in full of the Revolving Loans and any principal reductions of the
Interest Bearing Term Loan.

     9.10 Investment Advisor. Borrower has engaged Brean Murray as Borrower's
investment advisor ("Investment Advisor"). Subject to the confidentiality
agreement executed by the Agent and the Banks, as required by the Investment
Advisor and Borrower of other recipients, Borrower shall deliver to Agent, with
a copy for each of the Banks, any amended offering circular, book or other
presentation material intended for dissemination to prospective strategic
partners, investors or purchasers of Borrower's businesses, capital stock or
assets and, thereafter, shall within three (3) business days of receipt thereof
by Borrower, deliver to Agent, with a copy for each of the Banks, any
supplemental materials intended for dissemination to such prospective strategic
partners, investors or purchasers.

                                       11
<PAGE>   12

     9.11 Delivery of Contracts. Upon request of Agent from time to time,
Borrower shall within three (3) Business Days of such request deliver to Agent
copies of Borrower's and Guarantors' contracts with their respective customers
not previously delivered to Agent.

     9.12 No Additional Debt. Without the prior written consent of Banks,
Borrower and Guarantors shall not create, incur or suffer to exist, or permit
any Guarantor to create, incur or suffer to exist, any Debt or capital or
operating leases except, (i) Debt hereunder; (ii) the Replacement Line; (iii)
intercompany Debt and deferred rents and fees for services; (iv) Debt or capital
or operating leases incurred prior to the date of the Sixth Amendment and
permitted at the time incurred under the terms of Section 5.2(d) of this
Agreement; and (v) Debt incurred pursuant to indemnifications extended to
Sanborn Colorado, LLC in connection with or pursuant to the Sanborn Sale
Agreement.

     9.13 Contract Review. The Borrower has retained a consultant to review the
Borrower's and Guarantors' contracts at Borrower's expense. Borrower was to have
delivered to Agent and each Bank a copy of the written report of such
consultant, properly acknowledged as such consultant's work-product. Borrower
has requested that the Banks waive the requirement that the report be
acknowledged by such consultant. Banks agree to waive permanently this
requirement if the Replacement Line is funded prior to June 30, 2001. In the
event that the Replacement Line is not funded by June 30, 2001, Banks may
require Borrower to deliver the written report of this consultant, properly
acknowledged as such consultant's work-product. On the date of execution of the
Tenth Amendment, Borrower shall pay to Agent, for the benefit of each Bank, a
fee of One Thousand Five Hundred Dollars ($1,500) with respect to this
accommodation.

     9.14 Capital Expenditures. For the, period from April 1, 2001 through
September 30, 2001, Capital Expenditures shall not exceed the amounts projected
as capital expenditures in Borrower's financial projections for Fiscal Year 2001
dated April, 2001 (as previously delivered to Banks). Capital Expenditures for
the period after September 30, 2001, will be negotiated as apart of the
negotiations with respect to financial covenants to be agreed to prior to May
31, 2001.

     9.15 Additional Information. Borrower shall: (i) make available for
consultation with Agent, in the presence of one or more representatives of
Borrower, Borrower's Financial Management Consultant and Investment Advisor in
connection with such matters as may affect the Collateral, Borrower's financial
condition or the repayment of the Obligations and such other matters as Agent
may reasonably request; (ii) provide periodic status reports received from
Borrower's Financial Management Consultant and/or Investment Advisor; and (iii)
promptly deliver to Agent any letter of intent, written expression of interest
or offer received by Borrower or Borrower's Financial Management Consultant or
Investment Advisor in

                                       12
<PAGE>   13

connection with Borrower's efforts to achieve a strategic alliance, merger or
sale of all or a portion of Borrower's businesses, capital stock or assets, to
the extent that such letter, expression or offer is not subject to a
confidentiality agreement or non-disclosure provision.

     9.16 Cash Collateral Account. So long as any portion of the Revolving Loans
remain unpaid, Borrower shall maintain with Agent a cash collateral account,
over which Agent alone shall have the power of withdrawal. So long as no Event
of Default shall have occurred, all funds deposited in the cash collateral
account shall be released to Borrower's general operating account promptly after
Agent has received irrevocable credit with respect thereto.

     9.17 Subordination of Lien. In the event that each of the Initial
Subordination Requirements have been met or waived in writing by Banks on or
before the date with respect to which such Initial Subordination Requirement is
to be met, Banks and Agent will subordinate in writing their lien and security
interest in, to and upon all of the Borrower's and Guarantors' assets other than
equipment to the lien and security interest of a Replacement Lender and shall
enter into an intercreditor agreement with such Replacement Lender providing
that the Banks' and Agent's lien and security interest with respect to
Borrower's and Guarantors' equipment shall be pari passu with the lien of the
Replacement Lender (excluding the Non-Interest Bearing Term Loan in the
calculation of the respective shares).

     9.18 Release of Liens - Banks. Provided the Revolving Loans are paid in
full on or before June 30, 2001, the Interest Bearing Term Loan is paid in full
or before December 31, 2001 and on or before January 1, 2002, Borrower and
Guarantors have closed on an asset or stock purchase agreement, merger agreement
or other similar agreement with the company that has been independently
identified to the Banks by letter from the Borrower, Banks and Agent shall
consent to such transaction and immediately with closing of the transaction
release their liens and security interests in, to and upon the Borrower's and
Guarantors' assets and shall, at the option of each Bank, convert the
Non-Interest Bearing Term Loan to subordinated unsecured indebtedness with a
maturity of October 1, 2002 (being subordinated to all secured and unsecured
indebtedness of Borrowers and Guarantors and their respective successors) or
preferred stock redeemable on or before October 1, 2002, on terms and subject to
conditions reasonably acceptable to each Bank.

     9.19 Transfer of Title and Release of Lien - Banc One Leasing. Upon
receipt, on or prior to April 27, 2001, of the Colorado Lease Amount from the
Colorado Proceeds, Banc One Leasing will execute and deliver to Borrower a bill
of sale and partial release of liens, if any, with respect to all equipment
leased by Banc One Leasing to Borrower or any Guarantor which is identified by
Borrower and agreed in writing by Banc One Leasing to be located at Borrower's
office in Colorado Springs, Colorado. The term "Colorado Lease Amount" means the
agreed upon

                                       13
<PAGE>   14

release price for the equipment situated at the Colorado Springs, Colorado
office of Borrower identified on the attached SCHEDULE BOLC-1 to the Tenth
Amendment as set forth in Banc One Leasing's letter to Borrower dated April 20,
2001. Schedule BOLC-1 identifies the allocation of the Colorado Lease Amount to
the Leases, as agreed to by Banc One Leasing.

     9.20 Proceeds of Commonwealth Edison Receivable. Borrower claims to be owed
in excess of Two Million Seven Hundred Thousand Dollars ($2,700,000) by
Commonwealth Edison (the "Com Ed Claim"), which is disputed by Commonwealth
Edison. In the event of any payment of the Com Ed Claim prior to payment in
full of the Revolving Loans, Borrower shall pay to Agent for application against
the Revolving Loans and as a permanent reduction of the Revolving Loans
Commitment thirty percent (30%) of the amount of such payment after the sum of
all payments received exceeds One Million Dollars ($1,000,000). In the event of
any payment of the Com Ed Claim after payment in full of the Revolving Loans,
Borrower shall pay to the Replacement Lender for application against the
Replacement Line and as a permanent reduction of the availability thereunder
thirty percent (30%) of the amount of such payment after the sum of all payments
received exceeds One Million Dollars ($1,000,000); provided, however, that if
any amount is paid over to Agent with respect to the Revolving Loans pursuant to
the provisions of this Section 9.20, thirty percent (30%) of the amount of all
such payments received by the Replacement Lender shall be applied against the
Replacement Line and as a permanent reduction of the availability thereunder.

     9.21 Additional Events of Default. In addition to the Events of Default set
forth in Section 6.1 hereof and notwithstanding any provision of this Agreement
to the contrary, each of the following events shall constitute an Event of
Default hereunder:

          (a)  Failure to Timely Deliver Financial and Other Information.
     Borrower fails to timely deliver: (i) any contracts required by
     Section 9.11; (ii) a Rolling Cash Flow Projection; (iii) any
     Borrowing Base Certificate, A/R Aging, Revenue Report or Status
     Report; or (iv) any other information required to be delivered to
     Agent or Banks pursuant to the terms of this Agreement.

          (b)  Failure to Reach Agreement on Financial Covenants.
     Borrower and Banks fail to reach agreement on or before May 31,
     2001 with respect to financial covenants to become effective as of
     May 31, 2001, which covenants will be in lieu of, or in addition
     to, the provisions of Sections 5.2(a), 9.3 and 9.17, each as
     amended by the Ninth Amendment, as the parties may agree.

          (c)  Failure to Pay Monthly Renewal Fee. Borrower fails to
     timely pay any Monthly Renewal Fee.

                                   14
<PAGE>   15

     4.   Conditions Precedent. This Amendment shall be effective when Borrower,
each Guarantor, Agent, each Bank and Banc One Leasing have executed this
Amendment and Agent has received a counterpart originally executed by each of
the foregoing and:

          (a)  Borrower has executed and delivered to Agent for delivery to each
     Bank such Bank's Revolving Note in the form of Exhibit A-1, attached
     hereto;

          (b)  Borrower has executed and delivered to Agent for delivery to each
     Bank such Bank's Interest Bearing Term Note in the form of Exhibit A-2(a),
     attached;

          (c)  Borrower has executed and delivered to Agent for delivery to each
     Bank such Bank's Non-Interest Bearing Term Note in the form of Exhibit
     A-2(b), attached; and

          (d)  Agent has received the first Monthly Renewal Fee.

     5.   Substitution of Exhibits. Exhibit A-1 hereto shall be attached to the
Credit Agreement and substituted for the existing Exhibit A-1 to the Credit
Agreement and Exhibit A-2(a) and Exhibit A-2(b) hereto shall be attached to the
Credit Agreement and substituted for the existing Exhibit A-2 to the Credit
Agreement.

     6.   Post-Closing Items. On or before April 25, 2001, Borrower and each
Guarantor shall have delivered to Agent: (i) resolutions of its board of
directors authorizing the execution and delivery of this Amendment and the
performance of the obligations of Borrower and each Guarantor hereunder, and
(ii) a certificate of its secretary stating the names of those officers of
Borrower and each Guarantor authorized to execute this Amendment, each
containing a specimen signature of each such officer. Notwithstanding any
provision of this Amendment or the Credit Agreement, as hereby amended, to the
contrary, the failure of Borrower or any Guarantor to timely deliver the
foregoing shall constitute an Event of Default.

     7.   RELEASE OF BANKS, AGENT AND BANC ONE LEASING. BORROWER AND GUARANTORS
HEREBY FOREVER RELEASE AND DISCHARGE BANKS, AGENT AND BANC ONE LEASING, FROM,
AND HEREBY FOREVER RELINQUISH AND WAIVE, ANY AND ALL DEBTS, DEMANDS, CLAIMS,
LIABILITY, SUITS, PROCEEDINGS, EXPENSES, ACTIONS AND CAUSES OF ACTION
WHATSOEVER, OF EVERY KIND, NAME AND NATURE, KNOWN AND UNKNOWN, WHETHER OR NOT
FOUNDED IN FACT OR IN LAW, AND WHETHER IN LAW OR IN EQUITY OR OTHERWISE,
HERETOFORE OR NOW EXISTING OR HEREAFTER ARISING IN ANY MANNER WHATSOEVER ARISING
FROM, IN CONNECTION WITH OR WITH RESPECT TO FACTS ARISING BEFORE OR IN EXISTENCE
AS OF THE DATE OF EXECUTION OF THIS AMENDMENT, INCLUDING, WITHOUT LIMITATION,
ANY LOAN TO BORROWER, ANY REQUEST FOR WAIVER OF ANY COVENANT OR CONDITION OF THE
CREDIT AGREEMENT, ANY GUARANTY OR GUARANTEE OF GUARANTORS, ANY COLLATERAL
GRANTED TO BANKS OR AGENT TO SECURE ANY OBLIGATION OF ANY OF BORROWER OR
GUARANTORS TO BANKS OR AGENT, ANY NEGOTIATIONS BETWEEN BANKS OR AGENT AND THE
BORROWER OR ANY GUARANTOR WITH RESPECT TO ANY OF THE FOREGOING, THE MASTER
LEASE, THE LEASES, ANY FAILURE TO FUND ANY LEASE, ANY NEGOTIATIONS

                                       15
<PAGE>   16

BETWEEN BANC ONE LEASING AND THE BORROWER OR ANY GUARANTOR OR ANY OTHER MATTER
INVOLVING BORROWER, GUARANTORS OR ANY OF THEM, AND ANY OTHER ACT, ACTION,
DECISION, INACTION, REFUSAL TO ACT, FORBEARANCE OR OMISSION OF BANKS, AGENT,
BANC ONE LEASING OR ANY OFFICER, DIRECTOR, EMPLOYEE, ATTORNEY OR OTHER AGENT OF
BANKS, AGENT OR BANC ONE LEASING OR ANY OTHER MEMBER OF THE BANK/AGENT GROUP.
WITHOUT IN ANY MANNER LIMITING THE SCOPE OF THE RELEASE CONTAINED IN THIS
SECTION 7, BORROWER AND GUARANTORS EXPRESSLY AGREE THAT THEY HAVE CONSULTED, OR
HAD ANY OPPORTUNITY TO CONSULT, WITH LEGAL COUNSEL WITH RESPECT TO THE RELEASE
CONTAINED IN THIS AMENDMENT, THEY UNDERSTAND THAT THIS AMENDMENT CONTAINS A
RELEASE OF THE BROADEST POSSIBLE NATURE AND RESULTS IN THE RELEASE OF THOSE
CLAIMS KNOWN TO THE PARTIES AND THOSE CLAIMS WHICH ARE NOT KNOWN TO THE PARTIES
AND, FURTHERMORE, THAT THE RELEASE HEREBY GWEN IS GIVEN IN EACH AND EVERY
CAPACITY WHICH THE PARTY HOLDS AND RELEASES NOT ONLY THOSE CLAIMS WHICH THE
PARTY MIGHT HAVE BROUGHT DIRECTLY PRIOR TO THE EXECUTION OF THIS AMENDMENT BUT
ALSO THOSE CLAIMS WHICH MAY HAVE BEEN BROUGHT INDIRECTLY OR DERIVATIVELY BY
BORROWER OR GUARANTORS. BORROWER AND EACH OF THE GUARANTORS SHALL BE DEEMED TO
HAVE RELEASED, RELINQUISHED, WAIVED AND DISCHARGED EACH AND EVERY CLAIM ANY OF
THEM MAY HAVE WHETHER NOW EXISTING OR HEREAFTER ARISING TO THE FULLEST EXTENT
POSSIBLE AS HEREINBEFORE PROVIDED. BORROWER AND GUARANTORS ACKNOWLEDGE THAT THE
PROVISIONS OF THIS SECTION 7 ARE A MATERIAL INDUCEMENT FOR THE BANKS AND AGENT
TO ENTER INTO THIS AMENDMENT. For the purposes of this Section 7, Banks and
Agent shall mean Bank One, Colorado, N.A., Bank One, Indiana, N.A., KeyBank
National Association, National City Bank of Indiana, National City Bank,
Indiana, The Fifth Third Bank of Central Indiana and their
predecessors-in-interest, the parent company of any of them, all other
affiliates of Banks and Agent and all subsidiaries, direct or indirect, of
Banks, Agent and any other member of the Bank/Agent Group (as hereinafter
defined). For the purposes of this Section 7, Banc One Leasing shall mean Banc
One Leasing Corporation, any predecessor-in-interest, its parent company and all
other affiliates of Banc One Leasing Corporation and all subsidiaries, direct or
indirect, of Bank One Leasing Corporation and any other member of the Bank/Agent
Group. For the purposes of this Section 7, Bank/Agent Group shall mean Banks,
Agent, Banc One Leasing, the parent company of any of them, all other affiliates
of any of them and all subsidiaries, direct or indirect, of Banks, Agent, Banc
One Leasing and any other member of the Bank/Agent Group and all officers,
directors, employees, attorneys and other agents of Banks, Agent, Banc One
Leasing and all other members of the Bank/Agent Group.

     8.   Further Agreements/No Course of Dealing Established. Borrower and
Guarantors, jointly and severally, hereby acknowledge and agree that:

          (a)  Except as expressly set forth herein, this Amendment does not
     constitute, and no agreement, compromise or settlement of any kind has been
     reached between Banc One Leasing, Banks and Borrower or any Guarantor
     regarding, a reinstatement, restructuring or modification of the
     Obligations, any obligation of Borrower or any Guarantor under or with
     respect to the Master Lease and the Leases or any portion thereof or of any
     of the Loan

                                       16
<PAGE>   17

     Instruments, the Master Lease or any of the Leases and no such agreement
     shall exist or be deemed to exist unless and until all parties thereto
     execute and deliver complete documentation setting forth the terms of any
     such reinstatement, restructuring or modification;

          (b)  Banc One Leasing and Banks are not obligated to reach any further
     agreement concerning the reinstatement, restructure or modification of the
     Obligations, any obligation under or with respect to the Master Lease and
     the Leases or any of the Loan Instruments, the Master Lease or any of the
     Leases; and

          (c)  Neither this Amendment, nor any action taken or forbearance by
     Banc One Leasing and the Banks pursuant to this Amendment, shall impair,
     prejudice, or in any other manner affect the rights of Banc One Leasing,
     Agent or Banks in and to any of the Collateral or any property leased from
     Banc One Leasing by Borrower or any Guarantor (including, without
     limitation, any proceeds thereof) or establish or be deemed to establish
     any precedent or course of dealing with respect to any of the Obligations,
     any obligations under the Master Lease and the Leases or any Collateral or
     leased property.

     9.   Consent of Guarantor. Each of the Guarantors hereby expressly consents
to the execution and delivery of this Amendment by each of the parties to this
Amendment, including Banks and Banc One Leasing, and to the performance by
Borrower, Guarantors, Agent, Banks and Banc One Leasing pursuant to this
Amendment and agrees that neither the provisions of this Amendment nor any
action taken or not taken in accordance with the terms of this Amendment shall
constitute a termination, extinguishment, release or discharge of any of the
Obligations or the liability of the Borrower with respect thereto or the
obligations of any Guarantor or provide a defense, setoff or counterclaim to the
Borrower or any Guarantor with respect to any of the Obligations under the
Credit Agreement, any Guaranty in favor of Agents or Banks, as applicable, or
any Lease now existing or hereafter arising.

     10.  Survival/No Third Party Beneficiaries. All of the acknowledgments,
representations, warranties, covenants and agreements of the Borrower and each
of the Guarantors shall survive and continue in full force and effect from and
after the closing of this Amendment. There are no third party beneficiaries of
or to this Amendment.

     11.  No Joint Venture. Borrower and Guarantors acknowledge that the
relationship between Borrower and Guarantors, on the one hand, and Agent, Banks
and Banc One Leasing, on the other, is strictly that of "debtor/creditor", and
that this Amendment shall not be construed as creating a partnership, joint
venture or co-venture between them. Borrower and Guarantors acknowledge and
agree that neither Agent, any of the Banks nor Banc One Leasing is a fiduciary
with respect to them, or the creditors or equity security holders of Borrower or
Guarantors.

     12.  Counterparts. This Amendment may be executed in several counterparts
and by each party on a separate counterpart, each of which when so executed and
delivered shall be an original, and all of which together shall constitute one
instrument.

                                       17
<PAGE>   18

     13.  Entire Agreement. This Amendment embodies the entire agreement and
understanding between Borrower, Guarantors, Agent, Banks and Banc One Leasing
with respect to the subject matter hereof, and supersedes all prior agreements
and understandings relating to its subject matter. This Amendment may not be
amended or in any manner modified unless such amendment or modification is in
writing and signed by all of the parties hereto.

     14.  Ratification. Borrower and each Guarantor hereby ratify and confirm
its respective Obligations under the Credit Agreement and the other Loan
Instruments, as amended hereby, and the liens and security interests created
thereby, and acknowledges that it has no defenses, claims or setoffs to the
enforcement by Agent or Banks of Borrower's and/or Guarantors' Obligations under
the Credit Agreement and the other Loan Instruments, as amended hereby.

     15.  Continued Effectiveness. The Credit Agreement and the Loan Instruments
shall be amended only to the extent provided herein and shall remain in full
force and effect in accordance with their respective terms, as hereby amended.

     16.  Expenses. Borrower agrees to pay or reimburse on demand all reasonable
costs and expenses of the Agent, including, without limitation, legal fees,
incurred in connection with the preparation, execution, delivery, interpretation
or enforcement of this Amendment and the other agreements, documents and
instruments provided for herein and/or the interpretation or enforcement of the
Credit Agreement or any of the other Loan Instruments and/or any rights and/or
remedies of Agent and/or Banks under the Credit Agreement, this Amendment or
any of the other Loan Instruments.

     17.  Applicable Law. This Amendment shall be governed by and construed in
accordance with the substantive law of the State of Indiana notwithstanding the
fact that the conflict of law provisions of Indiana law may require the
application of the substantive law of another jurisdiction.

     IN WITNESS WHEREOF, the parties have executed and delivered this Amendment
by their respective duly authorized signatories effective as of the date first
set forth above.

                              ANALYTICAL SURVEYS, INC., as Borrower

                              By: /s/ MICHAEL A. RENNINGER
                                  ---------------------------------------------
                                  Michael A. Renninger, Chief Financial Officer

                              MSE CORPORATION, as Guarantor and lease guarantor

                              By: /s/ MICHAEL A. RENNINGER
                                  ---------------------------------------------
                                  Michael A. Renninger, Chief Financial Officer

                                       18Exhibit 10.1

EXHIBIT 10.1

        
                
                 
May 11, 2001

Equity Office Properties Trust

EOP Operating Limited Partnership

Senior Term Loan Facility

Commitment Letter

Equity Office Properties Trust

Two North Riverside Plaza

Suite 2100

Chicago, Illinois 60606

Attention: Richard Kincaid

Ladies and Gentlemen:

      EOP Operating Limited Partnership, a Delaware limited partnership (the
“Borrower”) and Equity Office Properties Trust (the “Guarantor”) have requested
that Banc of America Securities, LLC, J.P. Morgan Securities Inc. and Salomon
Smith Barney Inc. (collectively, the “Arrangers”) jointly agree to structure and
arrange a senior term loan facility in an aggregate amount of up to
$1,000,000,000 (the “Facility”). The Arrangers are pleased to advise you that
they are willing to act as joint and exclusive co-advisors, co-lead arrangers
and co-book runners for the Facility. In addition, The Chase Manhattan Bank has
agreed to serve as exclusive syndication agent for the Facility (in such
capacity, the “Syndication Agent”), Bank of America, N.A. has agreed to serve as
exclusive administrative agent for the Facility (in such capacity, the
“Administrative Agent”) and Salomon Smith Barney Inc. has agreed to serve as
exclusive documentation agent for the Facility (in such capacity, the
“Documentation Agent”, and together with the Syndication Agent and the
Administrative Agent, the “Agents”).

      Furthermore, the Syndication Agent, the Administrative Agent and
Citicorp Real Estate, Inc. (“CRE”, and together with the Syndication Agent and
the Administrative Agent, the “Lead Lenders”) and Dresdner Bank AG, New York
and Cayman Branches (“Dresdner”), Deutsche Bank AG (“Deutsche Bank”) and PNC
Bank, NA (“PNC”, and together with Dresdner and Deutsche Bank the “Co-Lenders”)
are pleased to advise you of the several commitment of each of the Lead Lenders
and Co-Lenders to provide up to the following amounts of the Facility upon the
terms and subject to the conditions set forth in this commitment letter (the
“Commitment

 

Letter”) and in the Summary of Terms and Conditions attached hereto as Exhibit A
(the “Term Sheet”)(each, an “Initial Commitment”):

	 	 	 	 	 
	Syndication Agent		$	271,666,666.67	
	
	
	
	

	Administrative Agent		$	271,666,666.67	
	
	
	
	

	CRE		$	271,666,666.66	
	
	
	
	

	Dresdner Bank		$	75,000,000.00	
	
	
	
	

	Deutsche Bank		$	75,000,000.00	
	
	
	
	

	PNC		$	35,000,000.00	

      In the event funds are advanced under the Facility and remain
outstanding for more than 120 days, the Arrangers shall have the right to
syndicate the Facility to financial institutions (collectively, with the Lead
Lenders and the Co-Lenders, the “Lenders”) as further described below, in each
case upon the terms and subject to the conditions set forth or referred to in
this Commitment Letter, the Term Sheet or the Fee Letter referred to below.

      It is agreed that the Administrative Agent will act as the sole and
exclusive administrative agent, that the Documentation Agent will act as sole
and exclusive documentation agent, that the Syndication Agent will act as sole
and exclusive syndication agent and that the Arrangers will act jointly as the
arrangers for the Facility, and each will, in such capacities, perform the
duties and exercise the authority customarily performed and exercised by it in
such roles. The Borrower and the Guarantor agree that no other agents, co-agents
or arrangers will be appointed, no other titles will be awarded and no
compensation (other than that expressly contemplated by the Term Sheet and the
Fee Letter referred to below) will be paid in connection with the Facility
unless the Borrower, the Arrangers, the Agents and the Lead Lenders shall so
agree.

      In the event the Arrangers commence syndication efforts the Borrower
and the Guarantor agree to actively assist the Arrangers in completing such
syndication as reasonably requested by the Arrangers. Such assistance shall
include (a) the Borrower and the Guarantor using commercially reasonable
efforts to ensure that the syndication efforts benefit materially from the
Borrower’s and the Guarantor’s existing lending relationships; (b) the Borrower
and the Guarantor assisting in the preparation of a confidential information
memorandum and other marketing materials to be used in connection with the
syndication by providing the information described in the following paragraph;
and (c) the Borrower and the Guarantor making their senior management and
advisors available to participate, upon reason-

2

able notice, in information meetings for potential syndicate members at such
times and places as the Arrangers may reasonably request.

      The Arrangers will jointly manage all aspects of the syndication,
provided that decisions as to the selection of institutions to be approached and
when they will be approached, when their commitments will be accepted and which
institutions will participate, will be made by mutual agreement of the Arrangers
and the Borrower and the allocations of the commitments among the Lenders and
the amount and distribution of fees among the Lenders will be determined by the
Arrangers, the Agents and the Lead Lenders. The Arrangers will have no
responsibility other than to arrange the syndication. To assist the Arrangers in
their syndication efforts, the Borrower and the Guarantor agree promptly to
prepare and provide to the Arrangers all information with respect to the
Borrower and the Guarantor and the transactions contemplated hereby, including
all financial information and projections (the “Projections”), as the Arrangers
may reasonably request in connection with the arrangement and syndication of the
Facility, so long as disclosure by the Borrower, the Guarantor or any of their
subsidiaries, of such information would not result in a violation of, or expose
the Borrower, the Guarantor or their subsidiaries to any material liability
under, any applicable law, ordinance or regulation or any agreements with
unaffiliated third parties which are binding on the Borrower, the Guarantor or
any of their subsidiaries or on any property of any of them. The Borrower and
the Guarantor agree to use commercially reasonable efforts to obtain any
necessary consents or waivers under any such agreements to disclose such
information to the Arrangers, the Agents and the Lenders. The Borrower and the
Guarantor hereby represent and covenant that (a) all information other than the
Projections (the “Information”) that has been or will be made available to the
Arrangers by the Borrower, the Guarantor or any of their respective
representatives is or will be, when furnished, complete and correct in all
material respects and does not or will not, when furnished, contain any material
misstatement or omission of fact and (b) the Projections that have been or will
be made available to the Arrangers by the Borrower, the Guarantor or any of
their representatives have been or will be prepared in good faith based upon
assumptions believed to be reasonable at the time of preparation thereof. The
Borrower and the Guarantor agree to supplement the Information and Projections
on the 120th day following the funding of the Facility and from time to time
upon request of the Arrangers or the Agents from the date hereof until the
completion of any syndication of the Facility as contemplated by this Commitment
Letter so all Information are complete and correct in all material respects and
do not contain any material misstatements or omissions of fact. The Borrower and
the Guarantor understand that in arranging and syndicating the Facility we may
use and rely on the Information and Projections without independent verification
thereof.

3

      As consideration for the Lenders’ commitment hereunder and the
respective agreements of the Arrangers and the Agents to perform the services
described herein, the Borrower and the Guarantor agree, jointly and severally,
to pay to each of the Lenders the nonrefundable fees set forth in the Term Sheet
and in the Fee Letter dated the date hereof and delivered herewith (the “Fee
Letter”).

      The commitment of the Lead Lenders and the Co-Lenders hereunder and the
respective agreements of the Arrangers and the Agents to perform the services
described herein are subject to (a) there not occurring or becoming known to us
any material adverse condition or material adverse change in or affecting the
business, operations, property, condition (financial or otherwise) or prospects
of the Borrower, the Guarantor and their respective subsidiaries, taken as a
whole since the latest audited financial statements delivered to the Arrangers,
(b) our completion of and satisfaction in all respects with a due diligence
investigation up until the execution of definitive documentation with respect to
the Facility with respect to the business, operations, property, condition
(financial or otherwise) or prospects of the Borrower, the Guarantor and their
respective subsidiaries, (c) our not becoming aware after the date hereof of any
information or other matter affecting the Borrower, the Guarantor or the
transactions contemplated hereby which is inconsistent in a material and adverse
manner with any such information or other matter disclosed to us prior to the
date hereof which inconsistency would have a material adverse effect on the
business, operations, property, condition (financial or otherwise) or prospects
of the Borrower, the Guarantor and their respective subsidiaries, taken as a
whole as shown in the latest audited financial statements delivered to the
Arrangers, (d) our satisfaction that prior to and during the syndication of the
Facility there shall be no competing offering, placement or arrangement of any
bank financing other than property-specific mortgage debt and property-specific
mezzanine debt not prohibited by the Existing Credit Agreement (as defined in
the Term Sheet) by or on behalf of the Borrower, the Guarantor or any affiliate
thereof and other than the assumption of (or advances under) that certain
$171,000,000.00 Master Construction Funding Facility with Mountain Ventures
Golden State, LLC, and other single-member limited liability companies, as
Borrower, First Union National Bank, as Senior Lender and Administrative Agent,
Spieker Properties #183, as Junior Lender, First Union Development Corporation,
as Equity Investor, and Spieker Properties, L.P., as Purchaser, unless otherwise
agreed by the Arrangers and the Agents, (e) the negotiation, execution and
delivery on or before June 15, 2001 of definitive documentation with respect to
the Facility satisfactory to the Lenders and their counsel and (f) the other
conditions set forth or referred to in the Term Sheet.

4

      The Term Sheet attached hereto is intended as an outline only and does
not purport to summarize all of the terms, conditions, covenants,
representations, warranties and other provisions which will be contained in
definitive financing agreements for the Facility. The commitment of each of the
Lenders is subject to the satisfaction of the conditions set forth in this
Commitment Letter and the Term Sheet and customary conditions for transactions
of this type. Subject to the provisions of this Commitment Letter, the
definitive financing agreements shall contain terms, conditions, representations
and warranties, financial and other covenants, events of default and remedies
consistent with the Term Sheet and otherwise satisfactory to the Arrangers, the
Agents and the Lenders.

      The Borrower and the Guarantor agree, jointly and severally to indemnify
the Arrangers, the Agents, the Lenders and the respective affiliates and the
respective directors, officers, agents, advisors and employees of the foregoing
(each an “Indemnitee”) and hold each Indemnitee harmless from and against any
and all liabilities, losses, damages, costs and expenses of any kind, including,
without limitation, the reasonable fees and disbursements of counsel, which may
be incurred by such Indemnitee in connection with any investigative,
administrative or judicial proceeding that may at any time (including, without
limitation, at any time following termination or expiration of this Commitment
Letter) be asserted against any Indemnitee, as a result of, or arising out of,
or in any way related to or by reason of this Commitment Letter, or any of the
transactions contemplated by this Commitment Letter or the execution, delivery
or performance of this Commitment Letter, but excluding those liabilities,
losses, damages, costs and expenses (a) for which such Indemnitee has been
compensated pursuant to the terms of this Commitment Letter or the Fee Letter or
(b) incurred solely by reason of the gross negligence, willful misconduct, bad
faith or fraud of any Indemnitee as finally determined by a court of competent
jurisdiction or (c) owing by such Indemnitee to any third party based upon
contractual obligations of such Indemnitee owing to such third party which are
not expressly set forth in this Commitment Letter. In addition, the
indemnification set forth in this paragraph in favor of any director, officer,
agent, advisor or employee of any Arranger, Agent or Lender shall be solely in
their respective capacities as such director, officer, agent, advisor or
employee. The Borrower’s and the Guarantor’s obligations under this paragraph
shall survive the termination or expiration of this Commitment Letter.

      Except for liability of each Lender for damages incurred by the Borrower
or the Guarantor to Spieker Properties, Inc. or Spieker Properties, L.P.
(collectively, “Spieker Properties”) in connection with a default by the
Borrower or the Guarantor under the Borrower’s agreement with Spieker Properties
that results

5

solely and directly from a breach of the obligations of such Lender under this
Commitment Letter (or directly in combination with such Lender’s breach and a
breach of the obligations of another Lender under this Commitment Letter), no
Arranger, Agent or Lender shall be liable for any special, indirect,
consequential or punitive damages in connection with its activities related to
the Facility or for any special, indirect, consequential or punitive damages in
connection with this Commitment Letter.

      This Commitment Letter shall not be assignable by the Borrower or the
Guarantor without the prior written consent of the Arrangers, the Agents and the
Lead Lenders (and any purported assignment without such consent shall be null
and void). The commitments of the Lenders and the obligations of the Arrangers
and the Agents set forth in this Commitment Letter are intended to be solely for
the benefit of the Borrower and the Guarantor and are not intended to confer any
benefits upon, or create any rights in favor of, any person other than the
Borrower and the Guarantor. This Commitment Letter may not be amended or waived
except by an instrument in writing signed by the Borrower, the Guarantor, the
Arrangers, the Agents and the Lenders. This Commitment Letter may be executed in
any number of counter-parts, each of which shall be an original, and all of
which, when taken together, shall constitute one agreement. Delivery of an
executed signature page of this Commitment Letter by facsimile transmission
shall be effective as delivery of manually executed counterpart hereof. This
Commitment Letter and the Fee Letter are the only agreements that have been
entered into among the Borrower, the Guarantor, the Arrangers, the Agents and
the Lenders with respect to the Facility and set forth the entire understanding
of the parties with respect thereto. This Commitment Letter shall be governed
by, and construed in accordance with, the laws of the State of New York.

      Neither this Commitment Letter, the Term Sheet, the Fee Letter nor any
of the terms or substance thereof shall be disclosed, directly or indirectly, by
the Borrower, the Guarantor or their respective affiliates to any other person,
other than (i) to the respective directors, offices, employees, attorneys and
auditors of the Borrower and the Guarantor on a confidential, “need-to-know”
basis, (ii) such disclosure as may be compelled in a judicial or administrative
proceeding or as otherwise required by applicable law, (iii) to the rating
agencies, (iv) as may be required pursuant to the provisions of any agreement to
which Borrower, Guarantor or such affiliate is a party, (v) as may be required
in connection with Borrower’s, Guarantor’s or such affiliate’s financial
statements, and (vi) in response to a query with respect to this Commitment
Letter, the Fee Letter or the terms or substance thereof.

6

      The Borrower and the Guarantor each acknowledge that the Arrangers, the
Agents and the Lenders may be providing debt financing, equity capital or other
services (including financial advisory services) to other companies in respect
of which the Borrower or the Guarantor may have conflicting interests regarding
the transactions described herein and otherwise. None of the Arrangers, the
Agents, the Lead Lenders or the Co-Lenders will use confidential information
obtained from the Borrower or the Guarantor by virtue of the transactions
contemplated by this Commitment Letter or their other relationships with the Borrower or the Guarantor
in connection with the performance by the Arrangers, the Agents, the Lead
Lenders or the Co-Lenders of services for other companies, and none of the
Arrangers, the Agents, the Lead Lenders or the Co-Lenders will furnish any such
information to other companies. The Borrower and the Guarantor also acknowledge
that the Arrangers, the Agents, the Lead Lenders and the Co-Lenders have no
obligation to use in connection with the transactions contemplated by this
Commitment Letter, or to furnish to the Borrower or the Guarantor, confidential
information obtained from other companies.

      The compensation, reimbursement, indemnification, confidentiality,
syndication and “market flex” provisions contained herein and in the Fee Letter
shall remain in full force and effect regardless of whether definitive financing
documentation shall be executed and delivered and, with respect to
reimbursement, indemnification and confidentiality, notwithstanding the
termination of this Commitment Letter or commitments and respective agreements
of the Arrangers, the Agents and the Lenders hereunder.

      If the foregoing correctly sets forth our agreement, please indicate the
Borrower and the Guarantor’s acceptance of the terms hereof and of the Term
Sheet and the Fee Letter by returning to us executed counterparts hereof and of
the Fee Letter not later than 5:00 p.m., New York City time, on May 15, 2001.
The commitments and respective agreements of the Arrangers, the Agents, the
Lead Lenders and the Co-Lenders herein will expire at such time in the event the
Administrative Agent has not received such executed counterparts in accordance
with the immediately preceding sentence.

7

      The Arrangers, the Agents, the Lead Lenders and the Co-Lenders are pleased to
have been given the opportunity to assist you in connection with this important
financing.

	 	Very truly yours,

	 	Arrangers

	 	BANC OF AMERICA SECURITIES, LLC

	 	By:  /s/ PATRICK TROWBRIDGE 

     Name: Patrick Trowbridge

     Title: Vice President

	 	J.P. MORGAN SECURITIES INC.

	 	By:  /s/ JOHN PERKINS 

     Name: John Perkins

     Title: Vice President

	 	SALOMON SMITH BARNEY INC.

	 	By:  /s/ KENT E. JEWETT 

     Name: Kent E. Jewett

     Title: Managing Director

 

	 	Agents

	 	BANK OF AMERICA, N.A.

	 	By:  /s/ PATRICK TROWBRIDGE 

     Name: Patrick Trowbridge

     Title: Vice President

	 	THE CHASE MANHATTAN BANK

	 	By:  /s/ MARC E. COSTANTINO 

     Name: Marc E. Costantino

     Title: Vice President

	 	SALOMON SMITH BARNEY INC.

	 	By:  /s/ KENT E. JEWETT 

     Name: Kent E. Jewett

     Title: Managing Director

 

	 	Lead Lenders

	 	BANK OF AMERICA, N.A.

	 	By:  /s/ PATRICK TROWBRIDGE 

     Name: Patrick Trowbridge

     Title: Vice President

	 	THE CHASE MANHATTAN BANK

	 	By:  /s/ MARC E. COSTANTINO 

     Name: Marc E. Costantino

     Title: Vice President

	 	CITICORP REAL ESTATE, INC.

	 	By:  /s/ DAVID BOUTON 

     Name: David Bouton

     Title: Director

 

	 	Co-Lenders

	 	DRESDNER BANK AG, NEW YORK

AND CAYMAN BRANCHES

	 	By:_______________________________

     Name:

     Title:

	 	DEUTSCHE BANK AG

	 	By:_______________________________

     Name:

     Title:

	 	PNC BANK, NA

	 	By:_______________________________

     Name:

     Title:

 

Accepted and agreed to as of

the date first written above by:

	EQUITY OFFICE PROPERTIES TRUST

	By:   /s/ MAUREEN FEAR 

     Name: Maureen Fear

     Title: Senior Vice President, Treasurer

	EOP OPERATING LIMITED PARTNERSHIP

By:     Equity Office Properties Trust,

          its general partner

	 	By:   /s/ MAUREEN FEAR 

     Name: Maureen Fear

     Title: Senior Vice President, Treasurer

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