[gdal-dev] including higher-level library in GPX creator string

[Even Rouault]

Cf https://github.com/OSGeo/gdal/pull/8558: "GPX: add a CREATOR dataset 
creation option"

It will be of course up to the application / application user to set it.

I've considered a global GDALSetDefaultCreatorApplication() (could be 
similar to CPLHTTPSetDefaultUserAgent(): 
https://gdal.org/doxygen/cpl__http_8h.html#ae83c06d51089bb340ed0b98a6ed8d01d) 
so that an application could set a default for all formats that write a 
creator application, but this leads to introducing potential options to 
express "totally replace the GDAL version" vs "add my name in addition 
to the GDAL version", or "put application/version number only when 
required by the format" vs "put application/version wherever the format 
could allow it, but only if there's a standardized location to do so" vs 
"put application/version wherever the format could allow, potentially it 
in a custom metadata item if there's no standardized location". e.g in 
netCDF, we have a custom attribute GDAL = "GDAL x.y.z, released 
YYYY/MM/DD" (it would not be appropriate to put the identification of 
the larger application in it, given the name of the attribute and the 
fact that GDAL itself parses it on reading to determine the bottom-up vs 
top-up orientaiton).  So I've not pursued this given all those dilemmas :-)

Even

Le 13/10/2023 à 14:52, Greg Troxel via gdal-dev a écrit :
> I am a member of the GPX standards list, and we are discussing a new
> version and also dealing with broken data.
>
> I wrote a gpx (from geojson), with just ogr2ogr, and the creator looks
> like this:
>
>    creator="GDAL 3.5.3"
>
> that's arguably totally fine with ogr2ogr.
>
> But it seems that if some random big program links with gdal and uses it
> to produce a file, the creator is just GDAL, and not "qgis 3.28.5 via
> GDAL 3.5.3" or something like that.  I groveled over all my gpx files
> and found none that indicated anything like this.
>
> It would be helpful to the GPX community if files were attributed to the
> larger software as well, so that they can be chased down or at least
> understood to be separately broken.
>
> I don't see anything at
>    https://gdal.org/drivers/vector/gpx.html#vector-gpx
> that could be used to do this.
>
> Does this make sense to people here?
>
> Is there any facility that would do this, that people just aren't using?
>
> Any other thoughts?
>
> Greg
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