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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K/A

(Amendment No. 1)

For Annual and Transition Reports Pursuant to

Sections 13 or 15(d) of the Securities Exchange Act of 1934



|   |  |                                                                                         
|-- |  | ----------------------------------------------------------------------------------------
|   |  |                                                                                         
|þ  |  | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934    
|   |  | For The Fiscal Year Ended September 30, 2005                                            
|  
|OR
|  
|o  |  | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
OF THE SECURITIES EXCHANGE ACT OF 1934
|   |  | For the Transition Period from           to                                             

Commission File Number 0-23078MAPINFO CORPORATION(Exact name of registrant as specified in its charter)



|Delaware(State or other jurisdiction of
incorporation or organization) | 06-1166630(I.R.S. Employer
Identification No.)
|---------------------------------------------------------------------- | ----------------------------------------------

One Global View
Troy, New York 12180(Address of principal executive offices and zip code)
Registrant's telephone number, including area code: (518) 285-6000___________________Securities Registered Pursuant to Section 12(b) of the Act:     NoneSecurities Registered Pursuant to Section 12(g) of the Act:     Common Stock, $.002 Par Value Per Share

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.

Yes X     No _____

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K

Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2). Yes X      No

Indicate by check mark whether the registrant is a shell company (as defined in Exchange Act Rule 12b-2). Yes      No X

The aggregate market value of the voting stock held by non-affiliates of the registrant was approximately $174,807,219 based on the closing price of the Common Stock on the Nasdaq National Market on March 31, 2005.

The number of shares outstanding of the registrant's common stock, $.002 par value per share, as of November 21, 2005 was 20,915,019.



DOCUMENTS INCORPORATED BY REFERENCE

None.





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Explanatory Note

MapInfo Corporation is filing this Amendment No. 1 to its Annual Report on Form 10-K for the fiscal year ended September 30, 2005, as originally filed with the Securities and Exchange Commission on December 14, 2005, for the sole purpose of correcting inadvertent omissions from and refiling the Section 302 certifications. This Amendment No. 1 on Form 10-K/A does not change the previously reported financial statements or any of the other disclosure contained in the original Form 10-K.

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| |                                      
| | -------------------------------------
| |                                      
| | By:	/s/ MARK P. CATTINI              
| | Mark P. Cattini                      
| | President and Chief Executive Officer
| |                                      
| |                                      

Date:	February 8, 2006

INDEX TO EXHIBITS

Exhibit

Number		 Description

31.3	Certification Pursuant to Rule 13a-14(a) or 15d-14(a) of the Exchange Act, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (Chief Executive Officer).

31.4	Certification Pursuant to Rule 13a-14(a) or 15d-14(a) of the Exchange Act, as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (Chief Financial Officer).