Hi,
I am looking for a solution to the following problem (that, I am sure, will
heavily relate on JTS, but I could not come with an easy solution by reading
the docs) :
I am looking for a function that will mimic my understanding of the UNION
operator in ArcGIS-
http://webhelp.esri.com/arcgisdesktop/9.2/index.cfm?TopicName=How%20Union%20%28Analysis%29%20works
[first figure, right] (do not have the option to test this), as opposed to the
typical union behaviour from JTS (geometry with a footprint covering all
argument geometries). So the result is a collection of "shards", small
geometries.
I do, however, do not want to end up with overlapping geometries with
duplicated arguments. As a result, I want a featureCollection with a schema
with all the attributes from the argument featureCOllections.
Imagine two features with geometries A and B, and attributes X and Y f1(A,X)
and f2(B,Y)(for instance, see the old JTS Technical Specifications guide,
Figure 10), that overlap.
More formally: as a result of mymethod(f1,f2), it returns a featureCollection
(f3,f4,f5), such that f3 = (A-B,X,Y=null), f4=(A interesection B, X,Y),
f5=(B-A, X=null, Y).
Now, by preference, this should be able to take as input N>2
featureCollections. I can come with all of this, but am looking for the best
way to implement the geometry cracking.
Anyone has a hint how to approach this?
Thanks,
Martin
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