[udig-devel] accuracy of GetFeatureInfo

[Jody Garnett]

Good question, it makes a direct call when able to make a direct 
rendering of the WMS image (ie udig is using a coordinate system 
supported by the WMS). In rare cases it may have to resample the image 
onto the screen (making up for lack of WMS projections), we could check 
that we back project the query into the coordinate space of the original 
image... but as I recall I wrote this one and went to some trouble to 
get it right.

Can you point us at a service illustrating the problem, perhaps in a 
jira report.
Jody
> Hi list,
>
> how accurate is uDIG with respect to GetFeatureInfo?
>
> I have tried it against 2 WMS's, Geoserver and Deegree, and at the 
> borders of provinces, a lot of times the wrong element is returned. 
> Ofcourse this could also be due to the WMS's.
>
> So I checked Gaia, and using Gaia it is very accurate for Geoserver, 
> so I am assuming it is a uDIG problem.
>
> Any input appreciated.
>
> Best regards,
> Bart
>