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Steve,
Have you
tried MapInfos built-in tool for this ? Here you specify a
3-Node Co-linear Deviation
value and a Node Separation tolerance.
And I'm pretty sure that MapInfo used the Douglas-Peucker algorithm.
This tool can be
found in the Object menu in the later versions of MapInfo, at least since
version 6..5
Peter Horsbøll Møller COWI har fået ny hjemmeside. Ydelserne GIS og IT, kort, kortlægning, 3D visualisering og arealforvaltning ligger under SAMFUND. Se mere her : www.cowi.dk COWI has changed its homepage. Our services within cadastre and landadministration, geodataproducts, mapping and GIS can be seen under SOCIETY. See our services here: www.cowi.com -----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Morrier, Steve Sent: Monday, November 21, 2005 9:14 PM To: [email protected] Subject: [MI-L] Intelligent Node Thinning Hi All,
Does anyone know of a tool that will do intelligent
node thinning? We have extracted a large number of forest blocks from 75cm
aerial photography using a spectral classification. The classification produces
a very "stepped" looking polygon with far too many nodes/points. I would like to
run a combination of smooth and generalize on the polygons. The problem is the
smooth seems to add more nodes and the generalize ends up really altering the
shape of the polygon. It would be nice to be able to specify an angle and a
distance that you could choose to keep or drop nodes based on the angle to the
next node and the distance. Does anything like this exist? Thanks very
much.
Steve
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