AW: [mapserver-users] WFS Spatial Filter Problem

Wed Aug 10 09:16:58 EDT 2011

Hi,

HTTP error code 500 means: Internal Server error and is usually reported when the (F)CGI process dies. Probably a simple NULL pointer dereference due to a missing check which results in a segmentation fault... Ever tried the thing with shp2img? If this also segfaults try recompiling with debug enabled and run it trough gdb.

Greets.

> -----Ursprüngliche Nachricht-----
> Von: mapserver-users-bounces at lists.osgeo.org 
> [mailto:mapserver-users-bounces at lists.osgeo.org] Im Auftrag 
> von Bryan Hempen
> Gesendet: Mittwoch, 10. August 2011 14:35
> An: Fawcett, David (MPCA)
> Cc: mapserver-users at lists.osgeo.org
> Betreff: Re: [mapserver-users] WFS Spatial Filter Problem
> 
> Hi David,
> 
> I enabled debugging using the following settings:
> 
>     CONFIG "MS_ERRORFILE" "/home/bhempen/ms_error.txt"
>     DEBUG 5
>     CONFIG "CPL_DEBUG" "ON"
>     CONFIG "PROJ_DEBUG" "ON" 
> 
> The only line that shows up after I got an error 500 using 
> the spatial filter is:
> 
> [Wed Aug 10 14:30:46 2011].451858 CGI Request 1 on process 21100
> 
> Not really helpful, right?
> 
> Regards,
> Bryan
> 
> On 09/08/2011 15:38, Fawcett, David (MPCA) wrote: 
> 
> 	Bryan, 
> 
> 	 
> 
> 	For testing, I would enable debugging at the MAP or 
> LAYER level.  If you set DEBUG 5, I think that you should be 
> able to see the query that MapServer is crafting.  
> 
> 	 
> 
> 	More on debugging here:  
> http://mapserver.org/optimization/debugging.html#debugging
> 
> 	 
> 
> 	David.
> 
> 	 
> 
> 	From: mapserver-users-bounces at lists.osgeo.org 
> [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of 
> Bryan Hempen
> 	Sent: Tuesday, August 09, 2011 4:15 AM
> 	Cc: mapserver-users at lists.osgeo.org
> 	Subject: Re: [mapserver-users] WFS Spatial Filter Problem
> 
> 	 
> 
> 	Dear Kai and Assefa,
> 	
> 	
> 	
> 	
> 
> 	After you two guys requested me to send you my setup, I 
> exported the content in the databasetable to a shapefile so 
> you can test it. When I tested the spatial filter right after 
> that, it suddenly worked ! This narrows down the possibilities:
> 	
> 	- The request I send is definitely not the problem 
> anymore. It works with MapServer + shapefile and with GeoServer.
> 	
> 	- I exported only the geometries to the shapefile in 
> the table with geometrytype = POLYGON because from ~8000 
> geometries ~10 are linestrings. So I investigated possible 
> problems with the linestring geometries by telling the 
> MapServer not to serve them using a subquery in the mapfile:
> 	
> 	DATA "the_geom from (select * from alldata where 
> geometrytype(the_geom) = 'POLYGON') as subquery using unique 
> product_id using SRID=4326"
> 	
> 	Error 500 still occured. Therefore, the data can't be 
> the problem neither, right?
> 	
> 	- Since I didn't change anything else MapServer must 
> have problems communicating with the PostGIS database, but 
> why Error 500 then?
> 	   
> 	Here is my mapfile:
> 	
> 	
> 	MAP
> 	    NAME "WFS Server"
> 	    STATUS ON
> 	    SIZE 600 400
> 	    SYMBOLSET 
> "/var/www/html/psa/bhempen/mapservertest/symbols/symbols.sym"
> 	    EXTENT -180 -90 180 90
> 	    UNITS DD
> 	    SHAPEPATH "/var/www/html/psa/bhempen/mapservertest/data/"
> 	    IMAGECOLOR 255 255 255
> 	    FONTSET 
> "/var/www/html/psa/bhempen/mapservertest/fonts/fonts.list"
> 	    MAXSIZE 4096 # needs to be set because otherwise an 
> error will appear when rendering images on large screens
> 	
> 	
> 	#IMAGECOLOR     200 200 200 #commented out for WFS
> 	
> 	PROJECTION
> 	       'init=epsg:4326'
> 	END
> 	
> 	    WEB
> 	    TEMPLATE  
> '/var/www/html/psa/bhempen/mapservertest/template.html'
> 	    IMAGEPATH '/var/www/html/psa/bhempen/tmp/'
> 	    IMAGEURL  '/psa/bhempen/tmp/'    
> 	      METADATA
> 	            "wfs_title"                  "WFS Demo 
> Server for MapServer" ## REQUIRED
> 	            "wfs_onlineresource"         
> "http://localhost/cgi-bin/psa/mapserv?map=/home/bhempen/wfs.ma
> p&" 
> <http://localhost/cgi-bin/psa/mapserv?map=/home/bhempen/wfs.ma
> p&>  ## Recommended
> 	            "wfs_srs"                    "EPSG:4326" ## 
> Recommended
> 	            "wfs_abstract"               "This text 
> describes my WFS service." ## Recommended
> 	      END    
> 	    END
> 	
> 	LAYER
> 	    NAME   "omega"
> 	    STATUS       DEFAULT
> 	    TYPE         POLYGON
> 	    METADATA
> 	        "wfs_title"             "omega footprints" ##REQUIRED
> 	        "wfs_srs"               "EPSG:4326" ## REQUIRED
> 	       "gml_include_items"     "all" ## Optional 
> (serves all attributes for layer)
> 	        "gml_featureid"         "product_id" ## REQUIRED
> 	    END
> 	    PROJECTION
> 	        "init=epsg:4326"
> 	    END
> 	    CONNECTIONTYPE POSTGIS
> 	    CONNECTION "host=localhost port=xxx dbname=xxx 
> user=xxx password=xxx"
> 	    DATA "the_geom from alldata using unique product_id 
> using SRID=4326"
> 	    CLASS
> 	        STYLE
> 	            OUTLINECOLOR    125 0 0
> 	        END
> 	    END
> 	    DUMP TRUE             ## REQUIRED
> 	END # layer
> 	
> 	END
> 	
> 	
> 	
> 
> 	Does anyone see a problem with the setup? 
> 	
> 	Many thanks to Kai and Assefa for the help so far! I am 
> going to send you the shapefile (which you could import into 
> the database with pgsql2shp), the mapfile, and my client.
> 	
> 	Kind regards,
> 	Bryan
> 
> 	
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