Hi,
I would like to retrieve Infos from a WMS (MapServer 4.10.0) with the
getFeatureInfo request, using GeoTools (2.3.0), but the LAYERS parameter is
missing in my final request.
I create first my getMap request using myWebMapServer.createGetMapRequest(),
then, create my getFeatureInfo request using
myWebMapServer.createGetFeatureInfoRequest(), finally, I ask the server using
myWebMapServer.issuerequest(myGetFeatureInfoRequest). But albeit my
getMapRequest has the good LAYERS parameter, my getFeatureInfoRequest has not
it.
Is someone know why I have this issue?
This is my code:
// START CODE
/**
* Makes a GetFeatureInfo request on the current WebMapServer.
* @param size Output size of the Map.
* @param crse Bounding Box of the Map.
* @param p Requested point (warning: with Java Y-axis !).
* @throws java.io.IOException
* @throws org.geotools.ows.ServiceException
* @return GetFeatureInfo of a point of current WebMapServer.
*/
public String getFeatureInfo( Dimension size , CRSEnvelope crse , Point p )
throws IOException, ServiceException {
StringBuffer sb = new StringBuffer();
// GetFeatureInfo needs a GetMap before
GetMapRequest gmReq = wms.createGetMapRequest();
// We add the requested Layer
gmReq.addLayer( getLayerByName(layerasstring) );
// We set the BBOX of the requested Map
gmReq.setBBox( crse );
// We set the dimensions of the output
gmReq.setDimensions(size.width, size.height);
// We set the output format
gmReq.setFormat("image/png");
// We set the SRS
gmReq.setSRS( crse.getEPSGCode() );
// We want a transparent background
gmReq.setTransparent(true);
// Now, we can create our GetFeatureInfo, from the previous GetMap
GetFeatureInfoRequest gfiReq = wms.createGetFeatureInfoRequest(gmReq);
// We want request this layer
gfiReq.addQueryLayer( getLayerByName( layerasstring ) );
// We need information from this point (warning : java Y-axis goes from
top to bottom, geographic goes from bottom to top !)
gfiReq.setQueryPoint( p.x , size.height - p.y );
// Tummy (Bidouille) used to circle an issue with LAYERS parameter...
gfiReq.setProperty( "LAYERS" , layerasstring );
// Debug
System.out.println( gmReq.getFinalURL().toString() );
System.out.println( gfiReq.getFinalURL().toString() );
// We ask the server
GetFeatureInfoResponse gfiRep = wms.issueRequest( gfiReq );
// We read the response
sb.append( FileReader.read( gfiRep.getInputStream() ) );
return sb.toString();
}
// END CODE
- layerasstring is the name of the layer.
- getLayerByName(String) function is a function which returns a
org.geotools.data.ows.Layer of the current server from his name.
- The tummy (is it the good word for "bidouille" in french ?!) is here for the
moment to make the code working, but I prefer find the bug. ;-)
- In the Debug output, the LAYERS parameter is here for gmReq (getMap), but not
for gfiReq (getFeatureInfo).
Thanks in advance,
bests,
______________________________
François Tertre
BRGM STI/AD
3, avenue Claude Guillemin
BP 6009 - 45060 Orléans Cedex 2
France
Tel:+33 238 643 642
Fax: +33 238 644 830
Secr: +33 238 643 999
Mail: [EMAIL PROTECTED]
Web: http://www.brgm.fr
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