[OpenLayers-Users] getFeatureInfo projection

[Alexandre.Laplante at statcan.gc.ca]

I'm still stumped on this one. Does anyone know what a Scale of -1
means? Or a Cellsize of 0? Is openlayers sending the coordinates in
meters, while mapserver is expecting them in latlon?
 
Thanks again,
Alexandre Laplante

	-----Original Message-----
	From: Laplante, Alexandre - AGRI/AGRI 
	Sent: July 23, 2009 2:25 PM
	To: 'users at openlayers.org'
	Subject: FW: [OpenLayers-Users] getFeatureInfo projection
	
	
	Yeah, I added getName because I have multiple layers, and I
needed to know which one is being queried. Should have mentioned that. 

		-----Original Message-----
		From: Dave Winfield [mailto:winfield.dave at gmail.com] 
		Sent: July 21, 2009 12:10 PM
		To: Alexandre.Laplante at statcan.gc.ca
		Subject: Re: [OpenLayers-Users] getFeatureInfo
projection
		
		
		I'm not totally sure, but what is map.getName()
returning?  You want it to be the layer that's on your wms layer.
		
		
		On Tue, Jul 21, 2009 at 11:52 AM,
<Alexandre.Laplante at statcan.gc.ca> wrote:
		

			Hello, 

			I have a map in EPSG:42304 projection. I'm
trying to have a getFeatureInfo return information about clicked
features, but there are always 0 results. I'm using mapserver, and when
I use a template header with:
			
			                        <tr> 
			                                 <th>Bounding
box</th> 
	
<td>[minx],[miny],[maxx],[maxy]</td> 
			                         </tr> 
			                         <tr> 
			                                 <th>Image
Coordinates</th> 
			                                 <td>[img.x],
[img.y]</td> 
			                         </tr> 
			                         <tr> 
			                                 <th>Map
Coordinates</th> 
			                                 <td>[mapx],
[mapy]</td> 
			                         </tr> 
			                         <tr> 
			                                 <th>Number of
results</th> 
			                                 <td>[nr]</td> 
			                         </tr> 
			                         <tr> 
			                                 <th>Scale</th> 
	
<td>[scale]</td> 
			                         </tr> 
			                         <tr> 
	
<th>Cellsize</th> 
	
<td>[cellsize]</td> 
			                         </tr> 

			I get back something like: 
			
			Bounding box
1593723.472943,6433235.946381,1740788.283491,6511201.698335 
			Image Coordinates 227, 115 
			Map Coordinates 1663128.279584, 6476040.672944 
			Number of results 0 
			Scale -1.000000 
			Cellsize 0.000000 
			Is this an issue of projection? What does a
scale of -1 mean? 

			This is the relevent openlayers javascript:
			map.events.register('click', map, function (e) {

	
OpenLayers.Util.getElement('nodeList').innerHTML = "Loading... please
wait..."; 

			            var url =
wms.getFullRequestString({ 
			                            REQUEST:
"GetFeatureInfo", 
			                            EXCEPTIONS:
"application/vnd.ogc.se_xml", 
			                            BBOX:
wms.map.getExtent().toBBOX(), 
			                            X: e.xy.x, 
			                            Y: e.xy.y, 
			                            INFO_FORMAT:
'text/html', 
			                            //QUERY_LAYERS:
wms.params.LAYERS, 
			                            QUERY_LAYERS:
map.getName(), 
			                            WIDTH:
wms.map.size.w, 
			                            HEIGHT:
wms.map.size.h}); 
			            OpenLayers.loadURL(url, '', this,
setHTML); 
			            OpenLayers.Event.stop(e); 
			      }); 
			    function setHTML(response) { 
	
OpenLayers.Util.getElement('nodeList').innerHTML =
response.responseText; 
			    } 

			Thank you, 
			Alexandre Laplante 


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