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NAD27 to NAD83 Coordinate Transformations for Canada

In order to perform coordinate transformations between NAD27 and NAD83 coordinate systems, Canadian users need to enable the application of the NTV2_0.GSB file that is provided by NRCAN and included with your installation of MicroSurvey CAD, inCAD, embeddedCAD or STAR*NET.  Perform a few steps to ensure the correct data files are in place:

(Other gridshift files for other regions are available at this page: World Grid Shift Files)


1. The NTV2 Gridshift binary file is included with your installation of any desktop product, but if required you can access it or a newer realization from:

The Gridshift will be saved to:

MicroSurvey CAD: C:\ProgramData\MicroSurvey\MSCAD\YYYY\mscad\Mapping\Canada\NAD83\

embeddedCAD: C:\ProgramData\MicroSurvey\embeddedCAD YYYY\mscad\Mapping\Canada\NAD83

inCAD: C:\ProgramData\MicroSurvey\inCAD\YYYY\mscad\Mapping\Canada\NAD83

STAR*NET: C:\ProgramData\MicroSurvey\StarNet\V**\Mapping\Canada\NAD83

2. Mobile products require that you download and unzip a preconfigured Mapping support files package from this link and save to your mapping folder:

FieldGenius Windows: 

Tablet PC: C:\ProgramData\MicroSurvey\FieldGenius\11\Mapping\Canada\NAD83

Windows Mobile or EC: <location varies> ProgramFiles\MicroSurveyFieldGenius\Programs\Mapping\Canada\NAD83

FieldGenius for Android:

(Most gridshift downloads are handled in the gridshift library)

<internal storage>\FieldGenius\Mapping\Canada\NAD83


 2. Next, use a text editor such as Notepad to open the following file:

MicroSurvey CAD: C:\ProgramData\MicroSurvey\MSCAD\YYYY\mscad\Mapping\Nad27toNad83.gdc

embeddedCAD: C:\ProgramData\MicroSurvey\embeddedCAD YYYY\mscad\Mapping\Nad27toNad83.gdc

inCAD: C:\ProgramData\MicroSurvey\inCAD\YYYY\mscad\Mapping\Nad27toNad83.gdc

STAR*NET: C:\ProgramData\MicroSurvey\StarNet\V**\Mapping\Nad27toNad83.gdc

or in FieldGenius Windows should be copied to:

FieldGenius Windows: 

Tablet PC: C:\ProgramData\MicroSurvey\FieldGenius\11\Mapping\Nad27toNad83.gdc

Windows Mobile or EC: <location varies> ProgramFiles\MicroSurveyFieldGenius\Programs\Mapping\Nad27toNad83.gdc

FieldGenius for Android

<internal storage>/FieldGenius/Mapping/Nad27toNad83.gdc

Remove the # from the start of the following line, and correct the spelling of Canada if it is wrong:

#.\Canada\NAD83\Ntv2_0.gsb     #version 2 of Canadian National Transformation

So that it looks like:

.\Canada\NAD83\Ntv2_0.gsb     #version 2 of Canadian National Transformation

 Then insert a # at the start of each of the following lines:


So that they look like:


Then save the file.



3. Then run your MicroSurvey product.  NAD27/NAD83 transformations should work properly.  If MicroSurvey was running while you made the above changes, you need to exit and restart it for the changes to take effect.



 4. Use the Migration wizard in desktop products to copy the customized gdc file between workstations or from year to year.

Choose files or drag and drop files
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  1. James Johnston

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