[PROJ] Problems adding geoidmodel tag

[Even Rouault]

Le 03/03/2026 à 17:48, Javier Jimenez Shaw a écrit :
> How could I know in advance that it is not using the geoid model file 
> from Slovakia? They (unfortunately) use the same vertical system, and 
> the accuracy in both cases is 0.03 m
> https://epsg.org/transformation_10568/ETRS89-CZE-2007-to-ETRS89-CZE-2007-Baltic-1957-height-2.html
> https://epsg.org/transformation_8361/ETRS89-SVK-SKTRF09-to-ETRS89-SVK-SKTRF09-Baltic-1957-height-1.html

Depends on how you perform the coordinate operation itself. But if you 
specify "--area Czechia" with cs2cs or  use the PJ_AREA* member of 
proj_create_crs_to_crs/proj_create_crs_to_crs_from_pj, you should only 
get those for Czechia


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