Hi,
I'm just following up on the post I made last week. I've done some
more investigation on what was the reason why I was getting my feature
geometries having a YX coord sequence even if I've specifically asked
for it to be in XY sequence using
final Hints hints = new Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER,
Boolean.TRUE);
crsFactory = ReferencingFactoryFinder.getCRSAuthorityFactory("EPSG", hints);
I have access to two datasets, the first one returns this GML snippet...
<wfs:FeatureCollection>
<gml:featureMembers>
<DPCD:BH2010_Estates gml:id="BH2010_Estates.1">
<DPCD:gid>1</DPCD:gid>
<DPCD:estatename>Manor Lakes</DPCD:estatename>
<DPCD:the_geom>
<gml:MultiSurface srsDimension="2"
srsName="urn:x-ogc:def:crs:EPSG:4283">
<gml:surfaceMember>
<gml:Polygon srsDimension="2">
<gml:exterior>
<gml:LinearRing srsDimension="2">
<gml:posList>-37.88634 144.6066
-37.885634 144.602371 -37.885627 144.602335 -37.885593
...</gml:posList>
</gml:LinearRing>
</gml:exterior>
</gml:Polygon>
</gml:surfaceMember>
</gml:MultiSurface>
</DPCD:the_geom>
</DPCD:BH2010_Estates>
</gml:featureMembers>
</wfs:FeatureCollection>
And the second dataset returns this...
<wfs:FeatureCollection>
<gml:boundedBy>
<gml:Envelope srsDimension="2"
srsName="http://www.opengis.net/def/crs/EPSG/0/4283";>
<gml:lowerCorner>-37.73385732 144.74719276000008</gml:lowerCorner>
<gml:upperCorner>-37.66292699 144.84819889000005</gml:upperCorner>
</gml:Envelope>
</gml:boundedBy>
<gml:featureMember>
<wescml-sf0:CombinedMeterReadings
gml:id="CombinedMeterReadings.fid--2dd7eee8_14d0d6ba0c6_45e8">
<gml:boundedBy>
<gml:Envelope srsDimension="2"
srsName="http://www.opengis.net/def/crs/EPSG/0/4283";>
<gml:lowerCorner>-37.73385732
144.74719276000008</gml:lowerCorner>
<gml:upperCorner>-37.66292699
144.84819889000005</gml:upperCorner>
</gml:Envelope>
</gml:boundedBy>
<wescml-sf0:aggregationID>
http://wescml.org/yvw-water/combined-meter-readings/2000000
</wescml-sf0:aggregationID>
<wescml-sf0:geometryID>3036</wescml-sf0:geometryID>
<wescml-sf0:spatialRepresentation>
<gml:MultiSurface srsDimension="2"
srsName="http://www.opengis.net/def/crs/EPSG/0/4283";>
<gml:surfaceMember>
<gml:Polygon srsDimension="2"
srsName="http://www.opengis.net/gml/srs/epsg.xml#4283";>
<gml:exterior>
<gml:LinearRing srsDimension="2">
<gml:posList>-37.72848142
144.8301788 -37.72850366999995 144.83013113000004 ...</gml:posList>
</gml:LinearRing>
</gml:exterior>
</gml:Polygon>
</gml:surfaceMember>
</gml:MultiSurface>
</wescml-sf0:spatialRepresentation>
<wescml-sf0:propertyTypeURI>http://wescml.org/def/ResidentialProperty</wescml-sf0:propertyTypeURI>
</wescml-sf0:CombinedMeterReadings>
</gml:featureMember>
</wfs:FeatureCollection>
Now, here's the interesting part, for the first example, I get the
coordinate sequence right ie XY (long/lat) which is what I requested.
And for the second dataset, I get YX (lat/long) still.
And the cause of this?? See line 529 of
https://github.com/geotools/geotools/blob/master/modules/unsupported/wfs/src/main/java/org/geotools/data/wfs/v1_1_0/WFS_1_1_0_DataStore.java
Is there a reason why the colon is needed in the comparison
if (supportedCRSIdentifier.endsWith(":" + epsgCode))
Why is http://www.opengis.net/def/crs/EPSG/0/4283 treated differently
from urn:x-ogc:def:crs:EPSG:4283
Regards,
Gerson
On Wed, May 6, 2015 at 11:51 AM, Gerson Galang <[email protected]> wrote:
> Hi,
>
> I'd like to know if there's a way to force the coordinate sequence to
> be in long/lat if I am talking to a WFS 1.1 service.
>
> This page (http://docs.geoserver.org/latest/en/user/services/wfs/basics.html)
> talks about using either of the following formats EPSG:XXXX or
> http://www.opengis.net/gml/srs/epsg.xml#xxxx. This method works if I
> use this format as the value of the SRSName if I send my request
> directly to the WFS service via POST or GET request. But if I use
> geotools and setup my query like this...
>
> // ... set up the other query parameters
> // and now the SRS name
> CoordinateReferenceSystem crs =
> crsFactory.createCoordinateReferenceSystem("EPSG:4283");
> query.setCoordinateSystem(crs);
> featureSource.getFeatures(query);
>
> The call to adaptQueryForSupportedCRS((Query) query) will return an
> srsName in either these formats..
>
> http://www.opengis.net/def/crs/EPSG/0/XXXX
> or
> urn:x-ogc:def:crs:EPSG:xxxx
>
> If GT gives me the above two formats, I will always end up with a Y-X
> (lat/long) sequence in all my feature collection. Is there a way go
> around this issue?
>
> Thanks,
> Gerson
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