On Nov 27, 2005, at 8:30 PM, David Hunt wrote:
I want to insure that the external boundary of polygon has its
vertices oriented
clockwise and the vertices of interior voids are oriented
counter-clockwise.
Also the goal is to remove the duplicate edges that are shared among
polygons
because I need the shapefile to be converted into a coverage.
Basically I want the clean tool to perform the functionality of ESRI's
CleanShapeFile.exe.
Thanks
Dave
Quoting Stephen Woodbridge <[EMAIL PROTECTED]>:
Hi Dave,
What type of cleaning do you want to do?
What do you expect such a utility to do?
-Steve
David Hunt wrote:
Hello all,
Does anyone know of a free utility to clean shapefiles? I am also
looking
for a
utility to take a coverage and convert it into a coverage.
Thanks for the help.
David
[EMAIL PROTECTED]
Dave,
I think what you are referring to is "topological cleaning" of a
shapefile: i.e. convert a shapefile to an ESRI coverage via building of
topology.
GRASS can build a topologically correct vector from a shapefile, which
can then be exported to a variety of formats which can be converted
into a "Coverage" .
Cheers,
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341
