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

[Adrian Popa]

Hello all!

I'm trying to convert my regular MAP file to be WMS compliant and to be 
able to get the contents through WMS requests. I am following the 
tutorial here: http://mapserver.org/ogc/wms_server.html.

The GetCapabilities request works: 
http://terra/cgi-bin/mapserv?map=/var/www/html/map/rtc_base.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities

The GetMap request fails:
http://terra/cgi-bin/mapserv?map=/var/www/html/map/rtc_base.map&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=GranitaJudete&STYLES=&SRS=EPSG:4326

The output returned is:
<?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>
<!DOCTYPE ServiceExceptionReport SYSTEM 
"http://schemas.opengis.net/wms/1.1.1/exception_1_1_1.dtd">
<ServiceExceptionReport version="1.1.1">
<ServiceException>
msProcessProjection(): Projection library error. no system list, errno: 13

</ServiceException>
</ServiceExceptionReport>


The Map file has the following definitions:
MAP
 ...
 WEB
   ...
   METADATA
      ...
      "wms_title" "Basic Map"
    "wms_attribution_title" "Basic Map"
    "wms_srs" "EPSG:900913"
   END
  END

PROJECTION
    #spherical mercator/google
     "+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"
END

LAYER
  NAME "GranitaJudete"
  ...
  METADATA
        "wms_title" "GranitaJudete"
        "wms_srs" "EPSG:4326"
    END
    PROJECTION
        #WGS84
        "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"
    END
    ...
END

END

The thing is (if I remember correctly) my mapserver doesn't really 
recognize projections by their EPSG code, but it works if I supply the 
other definition. I'm not sure how to correct that and I don't know if 
this is the cause.

I've looked into PROJ4 source code and I found refrences to errorcode 
-13 in this function: PJ *pj_latlong_from_proj( PJ *pj_in ) from 
src/pj_utils.c. It returns errorcode -13 if can't find "datum", "ellps" 
or "a".

I'm not sure where to go from here, as google doesn't find this 
particular error code...

Thanks

-- 
--- 
Adrian Popa