Problem with Custom Datum (7-parameters)
Hi to everybody, I'm new in the forum and I'm not an advanced user of Global Mapper. I'm using Global Mapper v21.0.0 (b091619) (23) [64-bit].
I'have some issues using a custom datum.
I have created a custom datum based on 7-parameter Bursa-Wolfe (Coordinate Frame Rotation) method (as this datum is not available in the EPSG database).
I have been provided a trial point to verify the correctness of conversion, and everything seems to work correctly. I have saved the project and I have checked that the right parameters have been stored on Global Mapper custom_datums.txt file.
The problem is that every time I go to open again the saved project, the custom datum rotation parameters changes alternately.
Also the datum name changes with an increasing suffix added to the original datum name (_##).
Please find attached two screenshot sof my custom_datums.txt file (one with datum "revision" 13 and on with "revision" 14): the datums with even number at the end of the name are the "correct" ones (i.e. according to the original custom datum). Furthermore, please note that the previous datum revisions remain in the custom_datums.txt file but the rotation parameters have been deleted.
Probably I did something wrong or it is a known bug of my release?
Please, in your opinion there is a way to solve this problem.
Thanks in advance
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