[OpenLayers-Users] the WMSGetFeatureInfo control, exceptions & infoFormats

[Bart van den Eijnden]

Hi Andrew,

the control just uses the EXCEPTIONS parameter value as specified on the WMS Layer. So you can control it that way.

infoFormat can also be specified on a WMS layer: parameter name is INFO_FORMAT

wrt the type value, e.g. ArcGIS Server returns an XML structure that does not allow us to determine from which layer a feature came when requesting GetFeatureInfo for multiple layers from an ArcGIS service. Not much we can do about this. I've reported this to ESRI in the past.

Best regards,
Bart

-- 
Bart van den Eijnden
OSGIS - http://osgis.nl

On Dec 21, 2011, at 5:25 PM, Andrew Bailey wrote:

> WMSGetFeatureInfo control & Exceptions.
> 
> If I use a Control.Click to build some GetFeatureInfo requests I can
> define an Exceptions parameter as part of the request. I've noticed that
> if I'm using the WMSGetFeatureInfo control then there is Exceptions
> parameter to define. I'm wondering if this is something that's missing
> from the control or it's handled deep within the library. Or as a
> developer is it something to be worried about.
> 
> infoFormats.
> 
> To place this in context: I'm working on an OL application with a
> collection of WMS layers of interest on top of some national base
> mapping. We're dealing with probably about 40-50 WMS publishers who use
> a good healthy mix of supported infoFormats :-/
> 
> We wish to implement an Info tool for all visible layers. The
> WMSGetFeatureInfo control is rather attractive for us as it allows a
> drillDown but I'm wondering if a more resilient approach would be to
> capture the infoFormats when we do our initial getCapabilities (as part
> of the GeoExt tree panel) and then build separate GetFeatureInfo
> requests for each layer. That way we would at least be able to identify
> which features come from which WMS layer. I've noticed that with the
> drillDown/WMSGetFeatureInfo approach not all features are returning with
> a type value. If two separate WMS layers are defined from the same WMS
> then i can't distinguish between the two.
> 
> Your thoughts/code would be appreciated on either matter!
> Andy
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