[mapserver-users] Grouping WFS Layers to Output One GML file

[Rahkonen Jukka]

Hi,

It seems to be a bit complicated but perhaps reading this thread helps
http://osgeo-org.1560.n6.nabble.com/WFS-multiple-typenames-in-request-only-one-in-reply-td4232816.html

Strictly speaking your filter is rather bad. You are using WFS 1.1.0 and GML 3 but your filter is using GML 2 "box" which does not exist at all in GML 3 and "coordinates" which is deprecated. I would suggest to use WFS 1.0.0 when your filter is OK or then build correct GML 3 filters. Your mixture may work with Mapserver but most probably not with schema validating servers like TinyOWS and deegree.

-Jukka Rahkonen-

________________________________________
Lähettäjä: Donald Kerr [donald.kerr at dkerr.co.uk]
Lähetetty: 26. kesäkuuta 2012 11:46
Vastaanottaja: Rahkonen Jukka; 'MAPSERVER USERS'
Aihe: RE: [mapserver-users] Grouping WFS Layers to Output One GML file

I need some further help if possible. I have got more than one layer to work
but am getting an error "Wrong number of filter elements" when trying to
apply a BBOX filter to the GetFeature request.

I can get the WFS GetFeature query to work for a single layer as follows:

localhost/cgi-bin/mapserv.exe?map=MyMap.map&service=wfs&version=1.1.0&reques
t=getfeature&typename=Layer1&maxfeatures=50&outputformat=gml3

And for two layers as follows:

localhost/cgi-bin/mapserv.exe?map=MyMap.map&service=wfs&version=1.1.0&reques
t=getfeature&typename=Layer1,Layer2&maxfeatures=50&outputformat=gml3

I can also filter the single layer as follows:

localhost/cgi-bin/mapserv.exe?map=MyMap.map&service=wfs&version=1.1.0&reques
t=getfeature&typename=Layer1&maxfeatures=50&outputformat=gml3&Filter=<Filter
><BBOX><PropertyName>msGeometry</PropertyName><box
srsName="EPSG:27700"><coordinates>56273,779431
56273,779431</coordinates></box></BBOX></filter>

But, if I try to filter on two layers as follows:

localhost/cgi-bin/mapserv.exe?map=MyMap.map&service=wfs&version=1.1.0&reques
t=getfeature&typename=Layer1,Layer2&maxfeatures=50&outputformat=gml3&Filter=
<Filter><BBOX><PropertyName>msGeometry</PropertyName><box
srsName="EPSG:27700"><coordinates>56273,779431
56273,779431</coordinates></box></BBOX></filter>

I get an error:

 <?xml version="1.0" encoding="ISO-8859-1" ?>
- <ows:ExceptionReport xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:ows="http://www.opengis.net/ows" version="1.1.0" language="en-US"
xsi:schemaLocation="http://www.opengis.net/ows
http://schemas.opengis.net/ows/1.0.0/owsExceptionReport.xsd">
- <ows:Exception exceptionCode="InvalidParameterValue" locator="filter">
  <ows:ExceptionText>msWFSGetFeature(): WFS server error. Wrong number of
filter elements, one filter must be specified for each feature type listed
in the TYPENAME parameter.</ows:ExceptionText>
  </ows:Exception>
  </ows:ExceptionReport>

I've tried various methods for specifying multiple filters but cannot get it
to work. Can anyone advise please?

Many thanks.

Regards,

Donald








-----Original Message-----
From: Rahkonen Jukka [mailto:Jukka.Rahkonen at mmmtike.fi]
Sent: 25 June 2012 21:47
To: Donald Kerr; 'MAPSERVER USERS'
Subject: Re: [mapserver-users] Grouping WFS Layers to Output One GML file


Hi,

Have you tried what happens if you give a list of layers as typename? This
should send you some data from TinyOWS

http://188.64.1.61/cgi-bin/tinyows?service=WFS&version=1.0.0&request=Getfeat
ure&typename=lv:puolilehti_25t,lv:puolilehti_50t

-Jukka Rahkonen-
________________________________________
 Donald Kerr wrote:

> Is it possible to group WFS layers, in much the same way as WMS:
"wms_group_title" "Several_Layers", so that a single gml file is returned
from Mapserver?

> To explain what I'm trying to do: I want to output several WFS layers
> as GML
so that they can be imported to another program as a single GML file. I
would like to make this file available as a url, i.e. right click - save as,
so that the user could then import the lot as a single file.

The easiest way for me to do this would be if I could group the WFS layers
at the Mapserver level and provide a link to that WFS request.

Alternatively, can anyone provide some ideas as to how this could be done
by, for example, OpenLayers (I know, wrong group!) or maybe some sort of
server side joining of multiple WFS layers.

Many thanks.

Regards,

Donald


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