Incorrect boundedBy in FeatureCollection
----------------------------------------
Key: GEOS-3020
URL: http://jira.codehaus.org/browse/GEOS-3020
Project: GeoServer
Issue Type: Bug
Components: WFS
Affects Versions: 1.7.4
Environment: Windows 2003 Server, Tomcat 5.5.27, Java 1.6.13
Reporter: Gerhard Sommer
Assignee: Andrea Aime
Priority: Minor
If WFS is configured not to include bounding boxes, the bounding box for the
complete result is null:
<wfs:FeatureCollection xmlns="http://www.opengis.net/wfs";
xmlns:wfs="http://www.opengis.net/wfs";
xmlns:vienna="http://www.wien.gv.at/ows/wfs/gml";
xmlns:gml="http://www.opengis.net/gml";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://www.opengis.net/wfs
http://ntsdeadv1:8080/geoserver/schemas/wfs/1.0.0/WFS-basic.xsd
http://www.wien.gv.at/ows/wfs/gml
http://ntsdeadv1:8080/geoserver/wfs?service=WFS&version=1.0.0&request=DescribeFeatureType&typeName=vienna:MZK_SITFE";>
<gml:boundedBy>
<gml:null>unknown</gml:null>
</gml:boundedBy>
<gml:featureMember>
...
I think this is bug, as it should display the bounding box around all the
features in this FeatureCollection.
If WFS is configured to include bounding boxes, all bounding boxes, even for
each Feature are included, as can be expected. But the bounding box at the
FeatureCollection level shows a much bigger bounding box:
<wfs:FeatureCollection xmlns="http://www.opengis.net/wfs";
xmlns:wfs="http://www.opengis.net/wfs";
xmlns:vienna="http://www.wien.gv.at/ows/wfs/gml";
xmlns:gml="http://www.opengis.net/gml";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://www.opengis.net/wfs
http://ntsdeadv1:8080/geoserver/schemas/wfs/1.0.0/WFS-basic.xsd
http://www.wien.gv.at/ows/wfs/gml
http://ntsdeadv1:8080/geoserver/wfs?service=WFS&version=1.0.0&request=DescribeFeatureType&typeName=vienna:MZK_SITFE";>
<gml:boundedBy>
<gml:Box
srsName="http://www.opengis.net/gml/srs/epsg.xml#31256";>
<gml:coordinates xmlns:gml="http://www.opengis.net/gml";
decimal="." cs="," ts=" ">-1221.41100000031,334744.782
4249.51400000043,340498.812999999</gml:coordinates>
</gml:Box>
</gml:boundedBy>
<gml:featureMember>
..
The selection in both cases included the following BBOX filter:
<ogc:BBOX>
<ogc:PropertyName>SHAPE</ogc:PropertyName>
<gml:Box srsName="http://www.opengis.net/gml/srs/epsg.xml#31256";>
<gml:coordinates>1600,337000 3000,338150</gml:coordinates>
</gml:Box>
</ogc:BBOX>
and there is not one single negative coordinate in the result (which should be
the case, if the lower left corner of the bounding box starts with -1221!).
So what does this bounding box describe?
I think, that in any case it should be a box, which encloses all features in
the result. It makes sense to configure GeoServer, so that it does not output
the boundedBy Element for each feature. But it makes also much sense to always
include the correct bounding box for all the features in the result. Maybe this
is the reason, why gml:boundedBy is not optional in the
AbstractFeatureCollectionBaseType. To output gml:null instead of the
coordinates will validate against the schema, but it would be more useful to
output the correct bounding box.
Best Regards,
Gerhard
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