defining WFS Geometry/spatial column

Thu Mar 17 11:46:43 EST 2005

Hi,

I guess something has changed in this department of Mapserver after
version 4.0.

If I look at the following post, it used to be true in 2003:

http://mapserver.gis.umn.edu/data2/wilma/mapserver-users/0312/msg00343.html

I don't know what the background is of changing this, maybe someone else
knows???

The metadata you mention (wfs_geometry_element_name) is not part of the
latest WFS server docs anymore, so it is probably deprecated.

The propertyName is needed in the Filter, but you can fill in any value
you want, I just tried:

    <ogc:Filter>
      <ogc:BBOX>
        <PropertyName>a</PropertyName>
        <gml:Box><gml:coordinates>121000,469000
140000,470000</gml:coordinates></gml:Box>
      </ogc:BBOX>
    </ogc:Filter>

and it works. But I leave it out (<PropertyName>a</PropertyName>) or use
an empty PropertyName, it does not work.

Best regards,
Bart

> Hi,
>
> Thank you very much for your prompt response. I have a follow up question.
>
> How can I define the geometry/spatial column? My DescribeFeatureType never
> showed the name of such a column, so I never noticed this issue. In
> particular, when ArcView shape files are used, the geometry/spatial column
> is hidden. But I cannot see the information about the column in
> DescribeFeatureType even when I used in map file:
>         wfs_geometry_element_name "MS_GEOMETRY"
>
> Thank you!
>
> N. Zhou
>
>>From: Bart van den Eijnden <bartvde at XS4ALL.NL>
>>Reply-To: bartvde at XS4ALL.NL
>>To: MAPSERVER-USERS at LISTS.UMN.EDU
>>Subject: Re: [UMN_MAPSERVER-USERS] WFS filter query
>>Date: Tue, 15 Mar 2005 17:55:33 +0100
>>
>>Hi,
>>
>>if you use the HTTP GET interface, you need to provide the same filter,
>> so
>>for my situation:
>>
>>http://myserver/cgi-bin/mapserv.exe?map=/ms4w/apps/general/map/provincies.map&SERVICE=WFS&VERSION=1.0.0&REQUEST=GetFeature&TYPENAME=Provincies&FILTER=<ogc:Filter><ogc:BBOX><PropertyName>MS_GEOMETRY</PropertyName><gml:Box><gml:coordinates>121000,469000
>>140000,470000</gml:coordinates></gml:Box></ogc:BBOX></ogc:Filter>
>>
>>You do need to specify the propertyName *inside the BBOX filter*, this is
>>the spatial column, Mapserver has a default of MS_GEOMETRY, which you can
>>also see by doing a DescribeFeatureType request on your WFS. This is
>>something else than the propertyName *outside the Filter* which you are
>>talking about, which can be used to only retrieve some attributes, which
>>is however not implemented in Mapserver.
>>
>>Did you try adapting my example for your situation? I don't use the wfs
>>namespace (GetFeature instead of wfs:GetFeature), and don't provide the
>>XML header which you do.
>>
>>Is GetCapabilities and DescribeFeatureType working?
>>
>>Good luck.
>>
>>Best regards,
>>Bart
>>
>> > Hi Bart,
>> >
>> > Thank you for your email.
>> >
>> > The only difference between your example and mine is "PropertyName"
>>under
>> > the <ogc:BBOX>. I think "PropertyName" is optional to specify returned
>> > elements. Does "<PropertyName>MS_GEOMETRY</PropertyName>" mean that
>> > spatial
>> > BBOX query should use the column "MS_GEOMETRY"? I use .shp files.
>> >
>> > Should I change my map file (or mapserver, which works for non Filter
>> > requests) to support the Filter and/or BBOX query? When I use the URL
>> > request:
>> >
>>http://localhost/cgi-bin/mapserv_44.exe?map=mymapfile&SERVICE=WFS&VERSION=1.0.0&REQUEST=GetFeature&TYPENAME=myType&FILTER=<Filter><Within><gml:Box><gml><coordinates>0,0
>> > 600000,600000</gml:coordinates></gml:Box></Within></Filter>
>> >
>> > the mapserver told me this:
>> > msWFSGetFeature(): WFS server error. Invalid or Unsupported FILTER in
>> > GetFeature
>> >
>> > Thank you!
>> >
>> > N. Zhou
>> >
>> >>From: Bart van den Eijnden <bartvde at XS4ALL.NL>
>> >>Reply-To: bartvde at XS4ALL.NL
>> >>To: MAPSERVER-USERS at LISTS.UMN.EDU
>> >>Subject: Re: [UMN_MAPSERVER-USERS] WFS filter query
>> >>Date: Tue, 15 Mar 2005 16:33:28 +0100
>> >>
>> >>Hi,
>> >>
>> >>this works for me:
>> >>
>> >><GetFeature service="WFS" version="1.0.0"
>> >>   maxFeatures="20"
>> >>   xmlns="http://www.opengis.net/wfs"
>> >>   xmlns:gml="http://www.opengis.net/gml"
>> >>   xmlns:ogc="http://www.opengis.net/ogc"
>> >>   xmlns:xlink="http://www.w3.org/1999/xlink"
>> >>   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>> >>   xsi:schemaLocation="http://schemas.opengis.net/wfs/1.0.0
>> >> WFS-basic.xsd">
>> >>   <Query typeName="gemeentes">
>> >>     <ogc:Filter>
>> >>       <ogc:BBOX>
>> >>         <PropertyName>MS_GEOMETRY</PropertyName>
>> >>         <gml:Box><gml:coordinates>121000,469000
>> >>140000,470000</gml:coordinates></gml:Box>
>> >>       </ogc:BBOX>
>> >>     </ogc:Filter>
>> >>   </Query>
>> >></GetFeature>
>> >>
>> >>Best regards,
>> >>Bart
>> >>
>> >> > Hi,
>> >> >
>> >> > I have a problem of using WFS filter to get data within a bounding
>> >> box.
>> >>My
>> >> > WFS post request is:
>> >> >
>> >> > <?xml version=\"1.0\" ?>
>> >> > <wfs:GetFeature service="WFS" version="1.0.0" outputFormat="GML2"
>> >> >             xmlns:wfs="http://www.opengis.net/wfs"
>> >> >             xmlns:ogc="http://www.opengis.net/ogc"
>> >> >             xmlns:gml="http://www.opengis.net/gml"
>> >> >             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>> >> >             xsi:schemaLocation="http://www.opengis.net/wfs"
>> >> >             http://schemas.opengis.net/wfs/1.0.0/WFS-basic.xsd">
>> >> >   <wfs:Query typeName="mytype">
>> >> >      <ogc:Filter>
>> >> >         <ogc:BBOX>
>> >> >            <gml:Box>
>> >> >               <gml:coordinates>0,0 505234,5448023</gml:coordinates>
>> >> >            </gml:Box>
>> >> >        </ogc:BBOX>
>> >> >      </ogc:Filter>
>> >> >   </wfs:Query>
>> >> > </wfs:GetFeature>
>> >> >
>> >> > But the mapserver would stop with an error of "Premature end of
>>script
>> >> > headers: mapserv_44.exe"
>> >> > Could anyone tell me why? I know there is a WFS bug of filtering
>> some
>> >> > elements rather than getting all elements.
>> >> >
>> >> > Thank you very much!
>> >> >
>> >> > N. Zhou
>> >> >
>> >
>