geoidgrids not found

[snowman2]

GeodPT08.gtx

Reference:

• https://gitter.im/pyproj4-pyproj/community?at=5d4add2ebb5364334cec4556
• https://gitter.im/pyproj4-pyproj/community?at=5d4cbf00d03a7c63e6f42609

$ cs2cs
Rel. 5.2.0, September 15th, 2018
<cs2cs>: 
...
$ echo -19476.384 -62016.159 4226.997 | cs2cs +init=epsg:3763 +to +init=epsg:3763 +geoidgrids=./GeodPT08.gtx
-19476.38    -62016.16 4172.78

$ cs2cs
Rel. 6.1.1, July 1st, 2019
...
$ echo -19476.384 -62016.159 4226.997 | cs2cs +init=epsg:3763 +to +init=epsg:3763 +geoidgrids=./GeodPT08.gtx
-19476.38    -62016.16 4227.00
$ echo -19476.384 -62016.159 4226.997 | cs2cs +init=epsg:3763 +to +init=epsg:3763
-19476.38    -62016.16 4227.00

Any guidance on the issue would be appreciated. Thanks!

[rouault]

This is the same as #1587 . You are transforming between a 2D and a 3D system. 3D transformation only occurs when both systems are 3D. I guess that cs2cs being a legacy utility we should try to emulate past behaviour and autopromote 2D systems to 3D