Re: [Geoserver-users] GetFeature request with polygon intersection throws exception

[Keane, T. <tk...@do...>]

Thanks to everyone for the assistance.

The following request xml with GML3 polygon works:


<wfs:GetFeature service="WFS" version="1.1.0" xmlns:doitt="http://gis.nyc.gov" 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/1.1.0/wfs.xsd">
<wfs:Query typeName="doitt:BOROUGH">
<wfs:PropertyName>SHAPE</wfs:PropertyName>
<ogc:Filter>
<ogc:Intersects>
<ogc:PropertyName>SHAPE</ogc:PropertyName>
<gml:Polygon>
<gml:exterior>
<gml:LinearRing>
<gml:posList>981897.6 197524.5 981950.0 197484.0 981948.3 197481.8 981938.7 197469.3 982035.8 197394.3 982059.6 197425.0 982081.2 197453.0 982138.6 197408.7 982151.4 197425.3 982151.7 197425.7 982155.1 197423.1 982159.5 197419.7 982159.7 197419.9 982186.1 197454.2 982200.5 197472.8 982178.5 197493.6 982129.9 197539.4 982046.4 197618.3 982041.3 197612.0 982040.2 197610.6 982039.8 197610.9 982015.8 197581.7 981990.6 197551.0 981979.4 197537.4 981965.2 197548.4 981949.8 197560.3 981954.6 197566.5 981939.2 197578.3 981913.5 197545.1 981897.6 197524.5 </gml:posList>
</gml:LinearRing>
</gml:exterior>
</gml:Polygon>
</ogc:Intersects>
</ogc:Filter>
</wfs:Query>
</wfs:GetFeature>


-----Original Message-----
From: Andrea Aime [mailto:aa...@op...] 
Sent: Friday, February 26, 2010 11:16 AM
To: Keane, Tim
Cc: Ben Caradoc-Davies; Haskins, Sarah; Geo...@li...
Subject: Re: [Geoserver-users] GetFeature request with polygon intersection throws exception

Keane, Tim wrote:
> i did try swapping x and y coords - no help
> 
> before i left work i downloaded geoserver and geotools src and
> debugged.  it looked to me like the geotools parser in the xsd
> extension (i don't remember the exact class or package now as i don't
> have the src at home) was creating an empty polygon from the request
> xml.  then the null pointer was thrown at
> org.geotools.data.oracle.sdo.SDO.D(SDO.java:145) because it trys to
> determine the dimension by accessing the z value of one of the
> polygon coords, but the empty polygon has no coords.

Ah, this is useful. It usually happens when your request is invalid
GML. To double check add &strict=true to your request url to force
schema validation, that might give you a hint.
A common problem is to make a WFS 1.1 request with a GML2 polygon
when GML3 is expected instead

Cheers
Andrea