[GRASS-user] problem with v.proj building topology

Margherita Di Leo diregola at gmail.com
Sat Dec 4 14:18:34 EST 2010


Hi List,

I have a problem using v.proj. In in the destination location the vector map
is incomplete, it seems that the topology is not completely built. In
particular, there are missing polygons. The command line:

v.proj input=suolo_paes_ext location=UTM_32_ED50 mapset=mimmo
output=suolo_paes_ext --o

gives the following WARNING:

Building topology for vector map <suolo_paes_ext>...
Registering primitives...
5305 primitives registered
26646 vertices registered
Building areas...
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
WARNING: Area of size = 0.0 ignored
 100%
462 areas built
35 isles built
Attaching islands...
 100%
Attaching centroids...
 100%
Number of nodes: 4665
Number of primitives: 5305
Number of points: 0
Number of lines: 0
Number of boundaries: 4934
Number of centroids: 371
Number of areas: 462
Number of isles: 35
Number of incorrect boundaries: 4116
Number of centroids outside area: 224
Number of duplicate centroids: 12
Number of areas without centroid: 327

I'm using Debian, and tried both with grass6.4 debian package and grass6.5
svn

I also tried to use v.build after that, without results.

Any hints?

Thanks

-Margherita
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