[udig-devel] intersection/disjunction of layers?

[Jody Garnett]

The validation tools included in udig should be able to provide a check; 
list all the duplicates as "issues". In general you are going to do a 
"join" between the two featureSources; using a good old fashioned loop 
as seen on this page:
- 
http://docs.codehaus.org/display/GEOTDOC/12+Using+a+Loop+to+Join+FeatureCollections

Cheers,
Jody

> I have several layers related to a road network.  Each is composed of 
> LineStrings or similar.  These layers are all different views/subsets 
> of an underlying postgres table of road segments -- all referenced by 
> a primary "road segment id" key.
>
> I'm wondering if uDig (or any community plugins) provide an easy way 
> to see, for any pair of such layers, which road segments are shared by 
> the two layers and which are not shared - i.e. intersection and 
> disjunction of the sets of road segments.
>
> Any known capabilities which cover this?
>
> regards,
>
> Vince.
>
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