Custom projection does not appear in the projection list in MapInfo Discover

Products affected: MapInfo Pro, MapInfo Discover, MapInfo Discover 3D


I've added a custom projection line to my MAPINFOW.PRJ but it does not appear in the select projection dialog box's list.




  • Custom projection may not have been added to the correct ENCOM.PRJ file.
  • ​Custom projection may not have been added in the correct format.



UPDATED: December 3, 2019

MapInfo Discover's reprojection tools (as well as MapInfo Discover 3D) use a separate projection file to MapInfo Pro, into which you will need to copy and paste the custom projection lines.

This ENCOM.PRJ is located at-

C:\Users\USERNAME\AppData\Roaming\Encom\Common\Projections (Windows 7 / 8 / 10)

If it does not exist here, in older versions, it will be located in:

C:\ProgramData\Encom\Common\Projections\ENCOM.PRJ (Windows 7 / Windows 8)

C:\Program Files\Encom\Common\Projections\ENCOM.PRJ (Windows XP)

If it is still not listed in MapInfo Discover, ensure the custom projection uses the following exact formatting:

"--- Customname ---"
"Projectionname", x, x, x,