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Exhibit 10.2

PLEDGE AND SECURITY AGREEMENT

THIS PLEDGE AND SECURITY AGREEMENT is made as of March 3, 2008, as amended and
supplemented April 24, 2008, as subsequently amended and supplemented June 30,
2008, as subsequently amended and supplemented August 20, 2008, as subsequently
amended and supplemented September 4, 2008, and as subsequently amended and
supplemented October 9, 2008, by and between Xedar Corporation, a Colorado
corporation (hereinafter "Pledgor"), and Hugh H. Williamson, III (hereinafter
"Pledgee").

1.           Background. As of this date, Pledgee has loaned Pledgor up to Two
Million Eight Hundred Thousand Dollars and No Cents ($2,800,000.00) pursuant to
the terms of a Fifth Amended and Restated Secured Subordinated Promissory Note
(the “Note”) issued to Pledgee.  Therefore, the parties enter into this
Agreement.

2.           Pledge. Pledgor hereby grants a security interest to Pledgee in the
following "Collateral":  All present and future property of Pledgor wherever
located and however described (including, without limitation, any and all
present and future goods, whether constituting inventory, equipment, farm
products or consumer goods (and whether or not constituting a fixture) and any
and all present and future instruments, money, documents, chattel paper,
accounts, contract rights, and general intangibles), together, in each case,
with all proceeds and products thereof.  Pledgee acknowledges and agrees that
the security interest granted hereby is and shall be subordinate in every
respect to the security interest(s) of KeyBank National Association ("KeyBank")
in and to the Collateral under those certain Commercial Security Agreements
dated June 7, 2007 and September 28, 2007.

3.           Rights to Collateral. During the term of this pledge, and for so
long as the Pledgor is not in default in the performance of any of the terms of
this Agreement or in the payment of the Note, the Pledgor shall have the right
to possess, use, hypothecate, transfer and otherwise dispose of the Collateral
in the ordinary course of business. Pledgor will not sell or otherwise dispose
of the Collateral or any interest therein, outside the ordinary course of
business, without the prior written consent of Pledgee except for tangible
assets that are obsolete, broken or no longer required for the operation of the
Pledgor's business in the ordinary course

4.           Payment of Note.  Upon full payment of the Note, the Pledgee's
rights pursuant to this Pledge and Security Agreement shall immediately
terminate and thereafter Pledgor shall own all right, title, and interest in and
to the Collateral free of any encumbrances and without obtaining the consent of
any other person.

5.             Default.  In the event that the Pledgor defaults in the
performance of any of the terms of this Agreement or in the payment of the Note,
then the Pledgee shall have all the rights and remedies provided in the Uniform
Commercial Code in force in the State of Colorado at the date of this Agreement
and any rights which may be added by subsequent amendment, and, in this
connection, the Pledgee may, upon 30 days’ written notice to the Pledgor sent by
registered mail, without liability for any diminution in price which may have
occurred, and subject to the rights of KeyBank, sell all the Collateral in such
a manner and for such price as the Pledgee may determine.  Out of the proceeds
of the sale, subject to the rights of KeyBank, the Pledgee may retain an amount
equal to the principal and interest then due on the Note, plus the amount of the
expenses of the sale, including attorney’s fees, and shall pay any balance of
such proceeds to the Pledgor.  In the event that the proceeds of any sale are
insufficient to cover the principal and interest of the Note plus expenses of
the sale, the Pledgor shall remain liable to the Pledgee for any deficiency.

 
 

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6.           Miscellaneous. The rights of Pledgee shall inure to the benefit of
any subsequent holder of an interest in the Note.  This Agreement shall be
governed under the laws of the State of Colorado.

IN WITNESS WHEREOF, the parties have executed this Agreement the day and year
first above written.

 
PLEDGOR:
Xedar Corporation, a Colorado corporation
                   
By:  
/s/ Steven M. Bragg                                           
 
  
 
Steven M. Bragg, CFO
 
  
                               
PLEDGEE:
             
By:  
/s/ Hugh H. Williamson, III
     
Hugh H. Williamson, III
 

 
 

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