Hi,
You are mixing parameters between different versions of OGC protocols, and this is causing at least some of your issues.
- &maxfeatures is a WFS version 1.x parameter. It should not do anything in a WMS request. For WFS 2.0.0, the corresponding parameter is called &count.
- &filter is technically only a WFS-parameter, so for it to work in WMS is a non-standard feature in GeoServer.
/Julian
From: Henning Lorenz henning.lorenz@anonymised.com
Sent: Thursday, 25 January 2024 11.16
To: geoserver-users@lists.sourceforge.net
Subject: [Geoserver-users] Features-templating and OGC services, filters not working, errors
Geoserver 2.24 and 2.21 snapshot with module app-schema and community modules features templating, ogcapi-features (all from same build date)
Hello,
I have set up a seemingly functional layer with features templating. However, I encounter a rather odd behaviour when I try to include filters in the query URLs. Here is a summary (I paste examples below):
WMS 1.3 requests: Simple GetMap request works. &maxFeatures works. CQL-filters do not work. OGC-filters on attributes work. Spatial OGC-filter returns an empty map.
WFS 2.0.0 query: Simple Get Feature query works. &maxFeatures has no effect. &bbox returns an error. CQL filters do not work. OGC-filters on attributes work. Spatial OGC-filter returns error.
No spatial filtering at all, no CQL filters, only OGC filters on attributes work. This limits the usefulness of WMS, and WFS is almost completely useless. I guess that something is wrong, but do not even know where to start looking for the problem, assuming that there is a common underlying problem. The log entries are very peculiar - not much with CQL-filter errors. On the other hand, extensive warnings that the OGC-filter - which actually works - could not be parsed. java.lang.RuntimeException on the spatial filter errors (java.lang.NullPointerException on OGC filter; Unable to evaluate template path against the template on bbox).
The main issue is that spatial filtering is not working (either no effect or returns error) while all features are displayed in the correct locations in a basic WMS map. Very peculiar is also that basic limitations like maxFeatures do not work, as it has nothing to do with the actual content. Any ideas on how to proceed with troubleshooting are very much appreciated.
Thank you and best wishes,
Henning
Below the tested queries with short comments:
WMS 1.3:
Requesting a map without any additional parameters works as expected:
http://localhost:8080/geoserver/eposgo/wms?service=WMS&version=1.3.0&request=GetMap&layers=eposgo:MagnetotelluricStationsFeature&bbox=62,21,65,26&width=700&height=600&srs=EPSG:4326&format=image/jpeg
maxFeatures works:
http://localhost:8080/geoserver/eposgo/wms?service=WMS&version=1.3.0&request=GetMap&layers=eposgo:MagnetotelluricStationsFeature&maxFeatures=5&bbox=62,21,65,26&width=700&height=600&srs=EPSG:4326&format=image/jpeg
CQL-filter on an attribute does not work (displays map with all features, unfiltered, as without filter):
http://localhost:8080/geoserver/eposgo/wms?service=WMS&version=1.3.0&request=GetMap&layers=eposgo:MagnetotelluricStationsFeature&bbox=62,21,65,26&width=700&height=600&srs=EPSG:4326&CQL-FILTER=surveyname=‘1998’&format=image/jpeg
OGC-filter on an attribute works as expected:
http://localhost:8080/geoserver/eposgo/wms?service=WMS&version=1.3.0&request=GetMap&layers=eposgo:MagnetotelluricStationsFeature&bbox=62,21,65,26&width=700&height=600&srs=EPSG:4326&FILTER=<Filter xmlns=“http://www.opengis.net/ogc” xmlns:gml=“http://www.opengis.net/gml”>surveyname1998&format=image/jpeg
OGC spatial filter returns empty map (tested with both latlon and lonlat, as the order of coordinates in different formats/standards (and their combination) always appears to be a mess to me)
http://localhost:8080/geoserver/eposgo/wms?service=WMS&version=1.3.0&request=GetMap&layers=eposgo:MagnetotelluricStationsFeature&bbox=62,21,65,26&width=700&height=600&srs=EPSG:4326&FILTER=<Filter xmlns=“http://www.opengis.net/ogc” xmlns:gml=“http://www.opengis.net/gml”>geometrygml:Polygongml:exteriorgml:LinearRinggml:posList24 62 26 62 26 65 24 65 24 62</gml:posList></gml:LinearRing></gml:exterior></gml:Polygon>&format=image/jpeg
http://localhost:8080/geoserver/eposgo/wms?service=WMS&version=1.3.0&request=GetMap&layers=eposgo:MagnetotelluricStationsFeature&bbox=62,21,65,26&width=700&height=600&srs=EPSG:4326&FILTER=<Filter xmlns=“http://www.opengis.net/ogc” xmlns:gml=“http://www.opengis.net/gml”>geometrygml:Polygongml:exteriorgml:LinearRinggml:posList62 24 62 26 65 26 65 24 62 24</gml:posList></gml:LinearRing></gml:exterior></gml:Polygon>&format=image/jpeg
WFS 2.0:
Query for all features works as expected:
localhost:8080/geoserver/eposgo/ows?service=WFS&version=2.0.0&request=GetFeature&typeName=eposgo:MagnetotelluricStationsFeature&outputFormat=application/json
maxFeatures does not work, the query returns all features:
localhost:8080/geoserver/eposgo/ows?service=WFS&version=2.0.0&request=GetFeature&typeName=eposgo:MagnetotelluricStationsFeature&maxFeatures=10&outputFormat=application/json
Filtering the query by an inline bbox results in an <ows:Exception exceptionCode=“NoApplicableCode”></ows:Exception> (from Geoserver log: “java.lang.RuntimeException: Unable to evaluate template path against the template”):
localhost:8080/geoserver/eposgo/ows?service=WFS&version=2.0.0&request=GetFeature&typeName=eposgo:MagnetotelluricStationsFeature&BBOX=62,21,65,26,EPSG:4326&outputFormat=application/json
Spatial filtering the query by a CQL-BBOX does not work, it returns all features:
localhost:8080/geoserver/eposgo/ows?service=WFS&version=2.0.0&request=GetFeature&typeName=eposgo:MagnetotelluricStationsFeature&CQL-FILTER=BBOX(62,21,65,26)&outputFormat=application/json
Spatial filtering the query with an OGC BOX or Contains returns <ows:Exception exceptionCode=“NoApplicableCode”></ows:Exception> (java.lang.NullPointerException):
localhost:8080/geoserver/eposgo/ows?service=WFS&version=2.0.0&request=GetFeature&typeName=eposgo:MagnetotelluricStationsFeature&FILTER=<Filter xmlns=“http://www.opengis.net/ogc” xmlns:gml=“http://www.opengis.net/gml”>geometrygml:coordgml:X21</gml:X>gml:Y62</gml:Y></gml:coord>gml:coordgml:X26</gml:X>gml:Y65</gml:Y></gml:coord></gml:Box>&outputFormat=application/json
localhost:8080/geoserver/eposgo/ows?service=WFS&version=2.0.0&request=GetFeature&typeName=eposgo:MagnetotelluricStationsFeature&FILTER=<Filter xmlns=“http://www.opengis.net/ogc” xmlns:gml=“http://www.opengis.net/gml”>geometrygml:Polygongml:exteriorgml:LinearRinggml:posList21 62 26 62 26 65 21 65 21 62</gml:posList></gml:LinearRing></gml:exterior></gml:Polygon>&outputFormat=application/json
CQL-Filter on an attribute does not work, it returns all features:
localhost:8080/geoserver/eposgo/ows?service=WFS&version=2.0.0&request=GetFeature&typeName=eposgo:MagnetotelluricStationsFeature&CQL-FILTER=surveyname=‘1998’&outputFormat=application/json
OGC-filter on an attribute works as expected:
localhost:8080/geoserver/eposgo/ows?service=WFS&version=2.0.0&request=GetFeature&typeName=eposgo:MagnetotelluricStationsFeature&FILTER=<Filter xmlns=“http://www.opengis.net/ogc” xmlns:gml=“http://www.opengis.net/gml”>surveyname1998&outputFormat=application/json
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