Dear MapServer-User,
I configured MapServer version 5.6.5 as WMS- and WFS-Server to offer 
information about land and properties. I use PostgreSQL/PostGIS (8.4.4/1.5.1) 
as datastore in this case. The spatial reference system is EPSG:25832 und the 
type of the geometry is MULTIPOLYGON. OS is Suse Linux Enterprise Server 11, 
Servicepack1.

WMS and WFS work fine until I use a spatial filter within the 
getFeature-Request of the WFS. In this case the response doesn't deliver any 
features. Nevertheless the number of features (e.g. numberOf Features='4') is 
correct. I tried this out with a couple of different boundingboxes and the 
known number of features that intersect these boundigboxes. In all cases I do 
not get any features back, but always the right number. So it seems that at 
least the intersection of the boundingbox and my data works correctly.

Please take a look at the following request and response that illustrate that 
problem:

Request:

http://myserver/cgi-bin/mapserv?map=/mapserver/mapfiles/u218768/ku_testwfs.map&REQUEST=getFeature&typename=folie001&SERVICE=WFS&VERSION=1.1.0&;
Filter=<ogc:Filter>
                <Intersects>
                        <ogc:PropertyName>msGeometry</ogc:PropertyName>
                        <gml:Polygon srsName='EPSG:25832'>
                                <gml:outerBoundaryIs>
                                        <gml:LinearRing>
                                                <gml:coordinates>409350,5709890 
409350,5709910 409370,5709910 409370,5709890 409350,5709890</gml:coordinates>
                                        </gml:LinearRing>
                                </gml:outerBoundaryIs>
                        </gml:Polygon>
                </Intersects>
        </ogc:Filter>


Response

<?xml version="1.0" encoding="ISO-8859-1" ?> 
<wfs:FeatureCollection xmlns:ms="http://mapserver.gis.umn.edu/mapserver"; 
xmlns:gml="http://www.opengis.net/gml"; xmlns:wfs=http://www.opengis.net/wfs 
xmlns:ogc="http://www.opengis.net/ogc"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:schemaLocation="http://mapserver.gis.umn.edu/mapserver 
http://myserver/cgi-bin/mapserv?map=/mapserver/mapfiles/u218768/ku_testwfs.map&SERVICE=WFS&VERSION=1.1.0&REQUEST=DescribeFeatureType&TYPENAME=folie001&OUTPUTFORMAT=text/xml;
 subtype=gml/3.1.1 http://www.opengis.net/wfs 
http://schemas.opengis.net/wfs/1.1.0/wfs.xsd"; numberOfFeatures="4">
       <gml:boundedBy>
       <gml:Envelope srsName="EPSG:25832">
                        <gml:lowerCorner>-1.000000 -1.000000</gml:lowerCorner> 
                                <gml:upperCorner>-1.000000 
-1.000000</gml:upperCorner> 
                </gml:Envelope>
        </gml:boundedBy>
</wfs:FeatureCollection>


Indeed of this behavior the WFS returns features when I do not use a spatial 
filter. Therefore in my opinion the WFS should be configured right in general. 
To me the spatial filter seems to be the problem. Unfortunately I do not have 
any ideas what is going wrong.

For more information you can take a look at my MapFile and a part of the 
capabilities document returned from the WFS below:

MAP
        NAME "ku_testwfs"
        STATUS ON

        SIZE 400 520
        EXTENT 389965 5693582 420177 5732815
        UNITS METERS

        PROJECTION
                "init=epsg:25832"
        END

        SYMBOLSET "/mapserver/symbols/symbols_alk.sym"
        FONTSET "/mapserver/fonts/fonts.fnt"
        IMAGECOLOR 255 255 255

        WEB
                IMAGEPATH "/mapbender/mb262/http/tmp/"
                IMAGEURL "http://myserver/mapbender/tmp/";

                METADATA
                        "ows_onlineresource" 
"http://myserver/cgi-bin/mapserv?map=/mapserver/mapfiles/u218768/ku_testwfs.map";
                        "ows_title" "Liegenschaftskarte, Kreis Unna"
                        "ows_accessconstraints" "Nutzung nur für den 
Dienstgebrauch."
                        "ows_abstract" "Flurstücksfolie der Liegenschaftskarte."
                        "ows_contactperson" "Andreas Fischer"
                        "ows_contactorganization" "Kreis Unna"
                        "ows_contactposition" "Zentrale Datenverarbeitung, 
Geodatenmanagement"
                        "wms_srs" "EPSG:25832 EPSG:31462 EPSG:31463 EPSG:31466 
EPSG:31467 EPSG:4326"
                        "wms_feature_info_mime_type" "text/html"
                        "wfs_srs" "EPSG:25832"
                END #METADATA  
        END #WEB
        
        LAYER
                NAME "folie001"
                STATUS ON
                TYPE POLYGON
                DUMP TRUE

                CONNECTIONTYPE postgis
                CONNECTION "user=dbuser password=dbpassword dbname=dbname 
host=dbhost port=dbport"
                DATA "the_geom from ku_view_folie001 USING UNIQUE objnr USING 
SRID=25832"
    
                METADATA
                        "ows_title" "Flurstücke"   
                        "wms_srs" "EPSG:25832 EPSG:31462 EPSG:31463 EPSG:31466 
EPSG:31467 EPSG:4326"    
                        "wms_feature_info_mime_type" "text/html"
                        "wfs_srs" "EPSG:25832"
                        "wfs_extent" "389965 5693582 420177 5732815" 
                        "gml_include_items" "all"
                        "gml_featureid" "objnr"
                END #METADATA
        
                CLASS
                        NAME "Flurstücke"
                        STYLE
                                OUTLINECOLOR 0 0 0
                                WIDTH 1
                        END # STYLE
                END  # CLASS
        END #LAYER
END #MAPFILE

[...]
- <     FeatureTypeList>
- <     Operations>
  <Query /> 
  </Operations>
- <FeatureType>
  <Name>folie001</Name> 
  <Title>Flurstücke</Title> 
  <SRS>EPSG:25832</SRS> 
  <LatLongBoundingBox minx="389965" miny="5.69358e+06" maxx="420177" 
maxy="5.73282e+06" /> 
 </FeatureType>
 </FeatureTypeList>
- <ogc:Filter_Capabilities>
- <ogc:Spatial_Capabilities>
- <ogc:Spatial_Operators>
  <ogc:Equals /> 
  <ogc:Disjoint /> 
  <ogc:Touches /> 
  <ogc:Within /> 
  <ogc:Overlaps /> 
  <ogc:Crosses /> 
  <ogc:Intersect /> 
  <ogc:Contains /> 
  <ogc:DWithin /> 
  <ogc:BBOX /> 
 </ogc:Spatial_Operators>
 </ogc:Spatial_Capabilities>
- <ogc:Scalar_Capabilities>
  <ogc:Logical_Operators /> 
- <ogc:Comparison_Operators>
  <ogc:Simple_Comparisons /> 
  <ogc:Like /> 
  <ogc:Between /> 
 </ogc:Comparison_Operators>
 </ogc:Scalar_Capabilities>
 </ogc:Filter_Capabilities>
 </WFS_Capabilities>

(The LatLongBoundingBox in this case is obviously not in units of LatLon but 
represent the boundingbox in the offered SRS 25832. This seems to be strange 
since thes doesn' t occur in the WMS-capabilities document. In this document 
the LatLongBoundingBox und the BoundingBox in the source SRS are both all 
right.)

I even tried different versions of MapServer and I discovered a slight 
difference with other versions. If I change my datasource from PostGIS to 
OGR/MapInfo Tab former versions of MapServer (5.4.2/5.2.3) provide features as 
well. But just in case of OGR/MapInfo Tab - not with PostGIS in use! As I have 
to use PostGIS I'm interested in any hints to solve this problem.
Therefore I would be glad to hear from you!

Thanks so far and best regards!
Andreas


Mit freundlichen Grüßen
Im Auftrag

Andreas Fischer

Kreis Unna - Der Landrat
Zentrale Datenverarbeitung
Friedrich-Ebert-Straße 17
59425 Unna

Fon 02 3 03 27-44 16
Fax 0 23 03 27-28 96
andreas.fisc...@kreis-unna.de
www.kreis-unna.de


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