WMS GetFeatureInfo beyond scale?

[doug@…]

I don't know if I would call this a bug, but the current behaviour of
MapServer's WMS GetFeatureInfo is to allow a request to be made even when the
layer is not shown on the map (outside of its scale range). I think that the
scale dependencies of a layer should be respected for both the GetMap and
GetFeatureInfo requests, and a request made using BBOX where the layer wouldn't
be visible should return an exception.

[doug@…]

Test case (may not be permanently available):
Version 4.2.3
Note: Feature geometry suppressed by code change.

GetMap (empty image returned because out of scale):

http://www.moxi.ca/wms/gisi?VERSION=1.1.1&REQUEST=GetMap&LAYERS=ROADS&STYLES=&SRS=EPSG%3A4326&BBOX=-123.15395251488823,49.244232067451485,-123.08537775741607,49.31280682492365&WIDTH=350&HEIGHT=350&FORMAT=image/png&TRANSPARENT=TRUE&EXCEPTIONS=application/vnd.ogc.se_inimage&

GetFeatureInfo (same map parameters):

http://www.moxi.ca/wms/gisi?VERSION=1.1.1&REQUEST=GetFeatureInfo&LAYERS=ROADS&STYLES=&SRS=EPSG%3A4326&BBOX=-123.15395251488823,49.244232067451485,-123.08537775741607,49.31280682492365&WIDTH=350&HEIGHT=350&FORMAT=image/png&QUERY_LAYERS=ROADS&INFO_FORMAT=application/vnd.ogc.gml&FEATURE_COUNT=25&X=147&Y=164&

... returns a bunch of results.

[assefa]

looking into this. When I quickly checked the code It seemed that this shoudl 
not be happen (the map extents/width are modified before the query is done so 
the query should have failed if layer was out of sacale).

BTW : before I check this I just checked the gml file returned from your 
requests and there seems to be no geometry component in it ? Is this a problem 
with the data ? That could explain why we do not see anything in the GetMap 
request.  Can you please check this aspect for me ?

<msGMLOutput 
	 xmlns:gml="http://www.opengis.net/gml"
	 xmlns:xlink="http://www.w3.org/1999/xlink"
	 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<ROADS_layer>
		<ROADS_feature>
			<gid>61520</gid>
			<streetname>Nelson St</streetname>
			<aliasname></aliasname>
			<rd_class>local</rd_class>
			<rd_classid>8</rd_classid>
		</ROADS_feature>
                 ...
 

 

[dmorissette]

I have had reports that scale is ignored by GetFeatureInfo in MapServer 5.0.

This would be nice to fix in 5.2.