Hello Grass-Users, I'm having problems with this sequence of commands: r.to.vect -s input=lszone output=lszone10 feature=area v.clean input=lszone10 output=lszone10_clean tool=rmarea thresh=2800 Below is the output. Overlaying lszone and lszone10_clean, I see that there are large holes that have been replaced with polygons. Is this a bug? Btw, I've tried this with QGIS on Windows XP as well as GRASS 6.4.svn with the same results. Bob
====================================================================== r.to.vect -s in=lszone out=lszone10 feature=area Extracting areas... 100% 100% Building topology for vector map <lszone10>... Registering primitives... 50074 primitives registered 629002 vertices registered Building areas... 100% 27613 areas built 17107 isles built Attaching islands... 100% Attaching centroids... 100% Number of nodes: 39568 Number of primitives: 50074 Number of points: 0 Number of lines: 0 Number of boundaries: 33886 Number of centroids: 16188 Number of areas: 27613 Number of isles: 17107 Number of areas without centroid: 11425 r.to.vect complete. v.clean in=lszone10 out=lszone10_clean tool=rmarea thresh=2800 -------------------------------------------------- Tool: Threshold Remove small areas: 2.800000e+03 -------------------------------------------------- Copying vector lines... Rebuilding parts of topology... Building topology for vector map <lszone10_clean>... Registering primitives... 50074 primitives registered 629002 vertices registered Building areas... 100% 27613 areas built 17107 isles built Attaching islands... 100% Attaching centroids... 100% Number of nodes: 39568 Number of primitives: 50074 Number of points: 0 Number of lines: 0 Number of boundaries: 33886 Number of centroids: 16188 Number of areas: 27613 Number of isles: 17107 Number of areas without centroid: 11425 -------------------------------------------------- Tool: Remove small areas 26251 areas of total size 9.34119e+06 removed -------------------------------------------------- Rebuilding topology for output vector map... Building topology for vector map <lszone10_clean>... Registering primitives... 4913 primitives registered 222687 vertices registered Building areas... 100% 1362 areas built 1127 isles built Attaching islands... 100% Attaching centroids... 100% Number of nodes: 4678 Number of primitives: 4913 Number of points: 0 Number of lines: 0 Number of boundaries: 4185 Number of centroids: 728 Number of areas: 1362 Number of isles: 1127 Number of duplicate centroids: 3 Number of areas without centroid: 637 Bob Moskovitz Research Analyst I Seismic Hazard Zonation Project California Geological Survey http://www.conservation.ca.gov/cgs/shzp<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /> CONFIDENTIALITY NOTICE: This communication is intended only for the use of the individual or entity to which it is addressed. This message contains information from the State of California, California Geological Survey, which may be privileged, confidential and exempt from disclosure under applicable law, including the Electronic Communications Privacy Act. If the reader of this communication is not the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited.
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