[PROJ] What is the syntax for a vertical datum change?

[Ulises Ibarra]

Mr. Even, thanks You very much.

El vie, 15 de mar de 2024, 1:42 a. m., Even Rouault <
even.rouault at spatialys.com> escribió:

>
> Le 15/03/2024 à 06:27, Ulises Ibarra via PROJ a écrit :
>
> Hello:
> I am trying to change the vertical datum of a LIDAR LAS file. But first I
> must understand the syntax of proj, but I can't understand it.
>
> If I use the following expression:
> echo 747194.732 2307402.892 2037.133 | proj +proj=vgridshift
> +grids=C:/clouds/geoids/GGM10_GEO.gtx
>
> "proj" is a legacy tool only for 2D cartographic projections. You want to
> use cct instead: https://proj.org/en/9.4/apps/cct.html
>
> -- http://www.spatialys.com
> My software is free, but my time generally not.
>
>
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