Wrong *.prj file for shapefile export

946

Hello,

In version 25.0, when exporting shp files and loading back, exist a visible shift.(EPSG code : 3844).

Deleting the prj files will open the files correctly after choosing the right projection.

bmg_mike

What projection is showing on the Projection tab of the Configuration dialog when you export and what is shown when you load the exported PRJ file?

EPSG 3844 comes in as Double Stereographic, but is identical to the Stereo70 / Pulkovo1942 projection. When I do a coordinate conversion between the 2 for a point in Romania they differ by less than a tenth of a millimeter, so obviously not a visible shift, therefore something else must be happening in your case.

Thanks,

Mike

Global Mapper Guru

946

Hello Mike,

I can see the difference in the imported and exported file, regarding projection tab, as in the print:

I will attach also the Exported .prj file (as .txt file due to forum restricted extensions)

Exported.txt

Thanks,

Robert

bmg_mike

Hi Robert,

Ah, now I can reproduce the issue. The TOWGS84 in the PRJ file was what triggered the incorrect S-42 specialization to be selected.

I have fixed the logic so the next v25.0.x daily build at https://www.bluemarblegeo.com/products/global-mapper-daily-builds.php should have this fixed.

You can also uncheck the option on the General->Export tab of the Configuration dialog to 'Include datum parameters and EPSG codes in WKT PRJ files' and then your exports won't exhibit the issue when loaded back in.

Thanks,

Mike

Global Mapper Guru

bmg_mike

Hi Robert,

It seems we haven't quite started pushing out daily builds for 25.0, but as soon as those start (maybe a week), this change should be in there for you.

Mike