Design flaw? "simplify" does not maintain geometry validity.
Self-intersections or geometry collapses can occur. The docs state this
... well, that geometries may no longer be simple anyway.
I suppose we could change this so that a geometry clean-up is performed
after the simplification ... but we would need to develop a proper
geometry "rebuilder" function first :)
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Kevin Neufeld
Software Developer
Refractions Research Inc.
300-1207 Douglas St.
Victoria, B.C., V8W 2E7
Phone: (250) 383-3022
Email: [EMAIL PROTECTED]
Martin Davis wrote:
I think you'd call this a design flaw. It sounds like JTS has a
similar problem. Can you post your test cases?
Burgholzer,Robert wrote:
I have experienced an instance where using simplify, depending on the
threshold chose, creates a geometry collection, rather than a
multipolygon (which was my source shape type).
I am unsure of exactly what is happening, but I know that with my
particular shapes, a threshold of 0.0025 (dd) caused the problem, but
0.002 was OK.
Is this a bug, a feature, or operator error?
Robert W. Burgholzer
Surface Water Modeler
Office of Water Supply and Planning
Virginia Department of Environmental Quality
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
804-698-4405
Open Source Modeling Tools:
http://sourceforge.net/projects/npsource/
Web-Based Water Supply Planning Demo:
http://soulswimmer.dynalias.net/models/wsdemo/demo_hsi.php
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