The Software area has a number of Excel workbooks and software packages for various COGO operations

Excel workbooks

The workbooks may be used in their current form or modified as needed for educational purposes. They may not be used wholly or in part for commercial purposes. Each is provided as-is with no warranty against defects or errors and the author is not liable for any damages arising from their use.

Each workbook uses Visual Basic for Applications so marcos must be enabled in Excel when opening the sheet.


A stand alone Windows program that performs Conformal, Affine, and Projective transformations using least squares. It can transform single points or point files. The software is described and available for download at Software | Coordinate Transformation Program

 updated 3 Nov '21

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