Andrew Walsh created GEOS-4951:
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Summary: WFS request with OGC filter subtracts time zone offset
from database date_time - GML output only
Key: GEOS-4951
URL: https://jira.codehaus.org/browse/GEOS-4951
Project: GeoServer
Issue Type: Bug
Components: WFS
Affects Versions: 2.1.3
Environment: Geoserver 2.1.3 with Geotools 2.7.4, Windows XP/Jetty,
ARCSDE datastore with ESRI 9.3 SDK jars
Reporter: Andrew Walsh
Assignee: Andrea Aime
Fix For: 2.1.4
Adding an OGC filter to a WFS request say filter by LOCATION='Bilgola' causes
subraction/addition of the local server time zone offset in GML output
apparently to convert
back to UTC. For example in the Oracle SDE table OBS_DATE_TIME=2004-11-14
11:37:00
(its a simple ORACLE DATE type in format YYYY-MM-DD hh:mm:ss)
but on output to GML 11 hours is subtracted (we are now in zone GMT+11
Australian EST (10) + Daylight Saving (1))
to OBS_DATE_TIME=2004-11-14 00:37:00. Not good for us -:( as for scientific data
we don't wan't to mislead/confuse clients about observation time.
Example request:
http://localhost:8080/geoserver/wfs?&VERSION=1.1.0&SERVICE=WFS&REQUEST=GetFeature&TYPENAME=test:RAN.BEACH_TEMP&Filter=<Filter><PropertyIsEqualTo><PropertyName>LOCATION</PropertyName><Literal>Bilgola</Literal></PropertyIsEqualTo></Filter>
GML you get back in browser:
<?xml version="1.0" encoding="UTF-8"?>
<wfs:FeatureCollection numberOfFeatures="3"
timeStamp="2012-02-07T06:13:55.734Z" .........">
<gml:featureMembers>
<test:RAN.BEACH_TEMP gml:id="RAN.BEACH_TEMP.10638">
<test:LON>151.3282</test:LON>
<test:LAT>-33.646</test:LAT>
<test:META_UUID>2d96ee5a-bc79-4d29-b627-f09f81f9e163</test:META_UUID>
<test:LOC_ID>5.0</test:LOC_ID>
<test:LOCATION>Bilgola</test:LOCATION>
<test:OBS_DATE_TIME>2004-11-14T00:37:00.593Z</test:OBS_DATE_TIME>
<test:TZONE>+11:00</test:TZONE>
<test:SST>19.3</test:SST>
<test:SHAPE>
<gml:Point srsDimension="2"
srsName="urn:x-ogc:def:crs:EPSG:4326">
<gml:pos>-33.646000000000015
151.32820000000004</gml:pos>
</gml:Point>
</test:SHAPE>
</test:RAN.BEACH_TEMP>
.....
.......
....
</gml:featureMembers>
</wfs:FeatureCollection>
Feature RAN.BEACH_TEMP.10638 has date_time 2004-11-14 11:37:00 in Oracle db
but on output to GML reports 2004-11-14T00:37:00.593Z. That is 11 hours
has been subtracted and its assuming that its a UTC time with the 'Z'
suffix. This is confusing and could be wrong as Geoserver is making assumption
about the time zone the observations were done in.
I note also the same request with CSV output issue doesn't happen i.e:
http://localhost:8080/geoserver/wfs?&VERSION=1.1.0&SERVICE=WFS&REQUEST=GetFeature&TYPENAME=test:RAN.BEACH_TEMP&Filter=<Filter><PropertyIsEqualTo><PropertyName>LOCATION</PropertyName><Literal>Bilgola</Literal></PropertyIsEqualTo></Filter>&outputFormat=csv
Note also if you just request all features in layer with NO filter
the date_time is unchanged.
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