[PROJ] Creating a dynamic system

[Even Rouault]

Le 22/02/2026 à 15:28, Javier Jimenez Shaw via PROJ a écrit :
> Hi
>
> the C function proj_coordinate_metadata_create can
> https://proj.org/en/stable/development/reference/functions.html#c.proj_coordinate_metadata_create
> allows to create a dynamic system with an epoch.
>
> In case the crs is not dynamic, it fails and emits an error.
> However I do not see how to check if a system is dynamic, to call it 
> only if really needed.
>
> Is there such a function in the C API?

checking proj_get_type() == PJ_TYPE_DYNAMIC_GEODETIC_REFERENCE_FRAME on 
the result of proj_crs_get_datum()

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