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

Tue Oct 13 01:59:27 PDT 2009

Hello Jukka,

I have added the PROJ_LIB statement in the map file. Unfortunately, 
nothing changes... strace still shows that shp2img tries to read 
/usr/share/proj/null (and it succeeds).
I have added the line with the google projection to the end of the epsg 
(and null) file.

I still get the same error.

Is there any way I can call proj + some parameters to ask for a 
projection between WGS84 to Google? I'd like to close in on the problem.

Thanks,
Adrian

Rahkonen Jukka wrote:
> Hi,
>  
> First, it is possible to tell Mapserver where to find the projection 
> files in the mapfile, in MAP section.  Excerpt from 
> http://www.mapserver.org/mapfile/map.html
>  
> PROJ_LIB [path]
> The CONFIG parameter can be used to define the location of your EPSG 
> files for the Proj.4 library. Setting the [key] to PROJ_LIB and the 
> [value] to the location of your EPSG files will force PROJ.4 to use 
> this value. Using CONFIG allows you to avoid setting environment 
> variables to point to your PROJ_LIB directory. Here are some examples:
> Unix
> CONFIG "PROJ_LIB" "/usr/local/share/proj/"
>  
>  
> Second, Mapserver epsg file ships without Google projection. Without 
> adding the definition it is impossible to refer to epsg:900913 
> projection with the code number. Have you added corresponding line to 
> the epsg file, whitch is usually in /usr/share/proj/epsg?
>  
> <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 
> <mailto:+nadgrids=@null> +no_defs
>  
> Put it on the first line so Mapserver finds it immediately without a 
> need to go through the whole list.
>  
> -Jukka Rahkonen-
>
>     ------------------------------------------------------------------------
>     *L�hett�j�:* mapserver-users-bounces at lists.osgeo.org
>     [mailto:mapserver-users-bounces at lists.osgeo.org] *Puolesta *Adrian
>     Popa
>     *L�hetetty:* 13. lokakuuta 2009 10:55
>     *Vastaanottaja:* Lars Lingner
>     *Kopio:* mapserver-users at lists.osgeo.org
>     *Aihe:* Re: [mapserver-users] msProcessProjection(): Projection
>     library error.no system list, errno: 13
>
>     Update:
>
>     I have symlinked the null file to epsg, and now strace shows that
>     the file is read, but I still get the same error when trying to
>     call WMS GetMap... :(
>
>     [root at terra map]# ls -l /usr/share/proj/null
>     lrwxrwxrwx 1 root root 20 Oct 13 10:50 /usr/share/proj/null ->
>     /usr/share/proj/epsg
>
>
>     Adrian Popa wrote:
>>     Thank you for your reply Lars, my info is inline.
>>
>>     Lars Lingner wrote:
>>>     Adrian Popa schrieb:
>>>       
>>>>     Hmm, any idea on this one? How can I find out if proj is trying to read
>>>>     the epsg file? I'm thinking of using strace to see what files it tries
>>>>     to open, but I don't know what syntax to use to try to project from 4326
>>>>     to 900913...
>>>>
>>>>         
>>>
>>>
>>>     Just to clarify:
>>>
>>>     - Your data is in wgs84 (epsg:4326)
>>>       
>>     Yes
>>>     - you want to serve mercator projection (epsg:900913)
>>>       
>>     Yes (the frontend will be OpenLayers (through TileCache)
>>>     A few questions:
>>>
>>>     - are there any errors in the capabilities document?
>>>       
>>     No, it looks ok. I can post it if you want, but it's a bit large.
>>     It outputs an XML which describes the layers, projections and
>>     some settings from the map file. I haven't seen another working
>>     GetCapabilites file, so I can't tell if it's missing something...
>>>     - did you tried to use mapserver logging (MS_ERRORFILE) and high debug
>>>     level (DEBUG 5)
>>>       
>>     Here is the output after enabling MS_ERRORFILE and DEBUG 5 at
>>     layer level and at map level:
>>     [Tue Oct 13 10:36:36 2009].954434 msProcessProjection():
>>     Projection library error. no system list, errno: 13
>>
>>     [Tue Oct 13 10:36:36 2009].954562 mapserv request processing time
>>     (msLoadMap not incl.): 0.000s
>>     [Tue Oct 13 10:36:36 2009].954584 msFreeMap(): freeing map at
>>     0x8496ac8.
>>     [Tue Oct 13 10:36:36 2009].954651 freeLayer(): freeing layer at
>>     0x84a9378.
>>>     - could you try to use shp2img, maybe this gives you a bit more information?
>>>       
>>     [root at terra map]# shp2img -o /tmp/out.png -m
>>     /var/www/html/map/rtc_base.map -e "20.259999999999998 43.16
>>     29.700000000000003 49.2016" -s "1250 800" -l "GranitaJudete"
>>     This works just fine (however it doesn't use WMS!). The image
>>     displayed is correct (and it is projected in mercator projection!).
>>
>>     If I run:
>>     [root at terra map]# strace shp2img -o /tmp/out.png -m
>>     /var/www/html/map/rtc_base.map -e "20.259999999999998 43.16
>>     29.700000000000003 49.2016" -s "1250 800" -l "GranitaJudete" 2>&1
>>     | grep epsg
>>     .. I don't get any matches on the epsg file that is supposed to
>>     be used by proj.
>>     Looking through the output of strace, I can see it tries to open
>>     some proj-related files...
>>     open("/usr/share/proj/proj_def.dat", O_RDONLY) = -1 ENOENT (No
>>     such file or directory)
>>     open("/usr/share/proj/null", O_RDONLY)  = -1 ENOENT (No such file
>>     or directory)
>>
>>     I wonder why it tries to open a file called null - maybe an error?
>>>     - did you compile MapServer and the dependencies by yourself?
>>>       
>>     Yes. These are my configure arguments:
>>     ./configure --with-freetype --with-png --with-agg=../agg-2.5
>>     --with-proj --with-ogr --with-gdal --with-xml2 --with-wfs
>>     --with-wcs \
>>     --with-wmsclient --with-wfsclient --with-postgis --with-threads
>>     --with-sos --with-mygis --with-geos --with-tiff
>>>     - what MapServer version do you use?
>>>       
>>     version 5.4.1
>>>     - do you have Proj4 installed? (OpenLayers doesn't use the same lib, it
>>>     uses the javascript lib)
>>>       
>>     [adrianp at terra mapserver]$ rpm -qa | grep proj
>>     proj-devel-4.5.0-1.fc5
>>     proj-4.5.0-1.fc5
>>
>>>     I hope it does not look like keeping you busy, but without further
>>>     information its difficult to help.
>>>
>>>       
>>     Your help is very much appreciated. Any idea is a good one
>>     because it might get me out of this predicament. :)
>>     Regards,
>>     Adrian
>>
>>     P.S. If I understand how projections work - if I "call" the
>>     projection with it's EPSG code it needs the epsg file to get the
>>     details about the projection. In my layers I'm using the EPSG
>>     definition instead the EPSG code to define my projections. If I
>>     switch to codes it won't work (I have tried a few months ago).
>>     So, to me, it seems mapserver (or proj) can't get the definitions
>>     from the epsg file (maybe because it searches for the wrong
>>     file). I will try to create the file and try again. I'll let you
>>     know how it works.
>>>     Lars
>>>     _______________________________________________
>>>     mapserver-users mailing list
>>>     mapserver-users at lists.osgeo.org
>>>     http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>
>>>       
>>
>>     ------------------------------------------------------------------------
>>
>>     _______________________________________________
>>     mapserver-users mailing list
>>     mapserver-users at lists.osgeo.org
>>     http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>       
>

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