[gdal-dev] Non documented (nice, uf) behaviour

[Frank Warmerdam]

Joaquim Luis wrote:
> Hi,
> 
> Still on the ps2raster issue that I mentioned 2 days ago, I was getting 
> a mysterious crashing
> in Windows when executing a system call with a gdal_translate command. 
> The is not related to
> GDAL at all but maybe to the quotes needed to wrap the +proj=... arguments.
> I finally managed to solve the issue by writing the proj string into a 
> file and use that
> file as argument to -a_srs
> 
> But the man page states that " ... or a file WKT"
> 
> -a_srs srs_def:
> Override the projection for the output file. The srs_def may be any of 
> the usual GDAL/OGR forms, complete WKT, PROJ.4, EPSG:n or a file 
> containing the WKT.
> 
> 
> I'm not complaining (well on the contrary), but we may need to document 
> this.
> Since what version is it possible to provide a Proj4 string in a file 
> for -a_srs?

Joaquim,

Underlying the -a_srs function is the OGRSpatialReference::SetFromUserInput()
method which does mention that proj.4 strings are accepted from a file.  The
problem is that it is not really practical to describe all coordinate
system specification methods everywhere they are used.

I have added a brief note in the introductory material on the utilities pages
indicating files with several formats are supported.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
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