On 31/08/16 16:32, Daniel Victoria wrote:
Hi List,
This is probably more due to my lack of understanding of how v.edit
works. But here it goes.
I have a polygon vector layer where some of the polygons have a 'No
data' label. I'd like to delete those polygons so I ran the command,
with the following output:
v.edit map=teste@isna tool=delete where="label like '%no data%'"
Selecting features...
207 of 7200 features selected from vector map <teste@isna>
207 features deleted
Building topology for vector map <teste@isna>...
Registering primitives...
6993 primitives registered
29546 vertices registered
Building areas...
2195 areas built
264 isles built
Attaching islands...
Attaching centroids...
Number of nodes: 3086
Number of primitives: 6993
Number of points: 0
Number of lines: 0
Number of boundaries: 5017
Number of centroids: 1976
Number of areas: 2195
Number of isles: 264
v.edit complete.
After that, the offending polygons where deleted however, their
boundaries are still present. That is, when I load the vector in the map
display, I still see the boundaries in some polygons, even though the
area is not filled. Is this the intended behavior? I tried using the
areadel tool but then the whong polygon was deleted. I'm guessing the
shared boundary of a valid polygon was removed and his caused problems.
Attached is a sample of what I'm seeing after v.edit delete
Attributes of areas are linked to the centroid of the area. So the
features you select through your query are these centroids, not the
boundaries.
It would probably be nice to have a type=area option in v.edit.
To get the same result, you could use v.extract -r type=area.
Moritz
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