[mapserver-users] msProcessProjection(): Projection library
error.no system list, errno: 13
Adrian Popa
adrian_gh.popa at romtelecom.ro
Tue Oct 13 04:59:27 EDT 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
>>>
>>>
>>
>> ------------------------------------------------------------------------
>>
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>> mapserver-users mailing list
>> mapserver-users at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>
>
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