Perhaps I'm missing something, but the concave hull only provides the outer
ring for the unioned geometry, right? i.e. how does it help with extracting
the rectangles?
On Tuesday, December 9, 2014 1:25 PM, sstein <[email protected]> wrote:
i general, you could use a concave hull algorithm (there is on by Eric Grosso
: rotefabrik.fr?) - but then you are still left to parameter tuning... my 2
centssyefan ------ Originalnachricht ------
Von: Shahak Nagiel
Datum: 09.12.2014 13:17
An: [email protected];
Betreff:[Jts-topo-suite-user] Rectangular-ize a geometry
I have some arbitrary collection of Envelopes (or rectangular Polygons) which
are often clustered together (adjacent to one another). I need to find some
way to extract the coarser-grained (larger) rectangles which comprise the
overall shape.
For example, think of an "L"-shaped polygon, comprised of a number of smaller
geometries (something like
http://www.nctm.org/uploadedImages/About_NCTM/President/Problem_to_Ponder/2011_0915_PTP_Figure2.jpg).
The end result (output) would be N envelopes/polygons that--merged
together--represent the original geometry.
Step one--merging--is simple (CascadedPolygonUnion). But how then to split
them apart? Maybe the right approach is to avoid merging them at first and try
instead to build the envelopes serially?
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