[Proj] msProcessProjection(): Projection library error. no system list, errno: 13

Adrian Popa adrian_gh.popa at romtelecom.ro
Tue Oct 13 08:04:57 EST 2009

Hello Jean-Claude,

Unfortunately I can't upgrade my proj version because it's running on a 
kind of "legacy" server and changing it would break other things.
I have added the new projection code to the epsg file, but it still 
doesn't work. It gives the same error.

I would like an example of command line syntax for running proj - 
because I suspect it doesn't read the correct epsg file.

I don't know if it's important but my epsg file is a symlink to the real 
file. It may be an issue if the mapserver process running as apache 
can't read through symlinks...

[root at terra map]# ls -l /usr/share/proj/epsg
lrwxrwxrwx 1 root root 24 Oct 13 16:01 /usr/share/proj/epsg -> 


Woohoo - I've changed the symlink to a hard link and now it works!
So, it seems there were some issues with apache, not being able to read 
through symlinks (maybe because it is disabled by default?)!
The moral of the story? Make sure /usr/share/proj/epsg is not a symlink!

Jean-Claude REPETTO wrote:
> Hello,
> Adrian Popa wrote :
>> I'd like to mention that I have added <900913> +proj=merc +a=6378137 
>> +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m 
>> +nadgrids=@null +no_defs 
> The correct EPSG number for this projection is 3857 (900913 is obsolete).
> Recent version of PROJ.4 contain this definition in the epsg file :
> <3857> +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 
> +y_0=0 +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs <>
> Regards,
> Jean-Claude
> _______________________________________________
> Proj mailing list
> Proj at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/proj

Adrian Popa
NOC Division
Network Engineer
Divizia Centrul National de Operare Retea
Departament Transport IP & Metro
Compartiment IP Core & Backbone
Phone: +40 21 400 3099

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