Hi,
I found a strange / undocumented feature when trying to chain a Mapserver WMS
service with a MapServer WFS. Both are using 4.2.2.
In the WMS map configuration, I defined the layer that was to come from the WFS
as follows (following the HowTo on the website):
...
LAYER
NAME airports
TYPE POINT
STATUS ON
CONNECTIONTYPE WFS
CONNECTION
"http://geoserver.itc.nl/cgi-bin/mapserv.exe?map=D:/Inetpub/geoserver/kobben/thailand/wfs_config.map&";
METADATA
"wfs_typename" "airportsWFS"
"wfs_version" "1.0.0"
"wfs_request_method" "GET"
"wfs_connectiontimeout" "60"
"wfs_maxfeatures" "100"
END
...
But this yielded an error message that went:
<?xml version='1.0' encoding="ISO-8859-1" standalone="no" ?>
<!DOCTYPE ServiceExceptionReport SYSTEM
"http://schemas.opengeospatial.net/wms/1.1.1/exception_1_1_1.dtd";>
<ServiceExceptionReport version="1.1.1">
<ServiceException>
msBuildWFSLayerGetURL(): WFS connection error. Metadata wfs_service must be set
in the layare
</ServiceException>
</ServiceExceptionReport>
Cryptic message, and it took me a looooong time to find that it DID work when I
added SERVICE=WFS to the CONNECTION string, although the HowTo states that
adding such things there is deprecated...
...
CONNECTION
"http://geoserver.itc.nl/cgi-bin/mapserv.exe?map=D:/Inetpub/geoserver/kobben/thailand/wfs_config.map&&SERVICE=WFS&";
...
You can try it out yourself at
http://geoserver.itc.nl/cgi-bin/mapserv.exe?map=D:/Inetpub/geoserver/kobben/thailand/chain_config.map&&VERSION=1.1.1&REQUEST=GetMap&LAYERS=world,airports&SRS=EPSG:4326&BBOX=97,5,106,21&WIDTH=600&HEIGHT=800&FORMAT=image/png
Is this a bug, or does it mean it's time to upgrade my Mapserver, or....?
--
Barend Köbben
International Institute for Geo-information
Sciences and Earth Observation (ITC)
PO Box 6, 7500AA Enschede (The Netherlands)
ph: +31 (0)53 4874253; fax: +31 (0)53 4874335
