Details Ticket 4225


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Serial Number 4225
Subject v.clean: several tools don't create the error vector
Area grass6
Queue grass
Requestors tutey@o2.pl
Owner mlanda
Status resolved
Last User Contact Thu Oct 5 12:37:41 2006 (2 yr ago)
Current Priority 30
Final Priority 70
Due No date assigned
Last Action Wed Jul 18 12:15:10 2007 (1 yr ago)
Created Thu Mar 30 13:47:38 2006 (2 yr ago)

Transaction History Ticket 4225


Thu, Mar 30 2006 13:47:38    Request created by guest  
Subject: v.clean: rmdac tool doesn't create the error vector

Platform: GNU/Linux/x86
grass obtained from: CVS
grass binary for platform: Compiled from Sources
GRASS Version: 2006-03-29

v.clean tool=rmdac removes multiple centroids from input OK, but fails to create
the "error" vector:



### There are 2 redundant centroids which I want to spot:

$ v.build parcels
Building topology ...
4137 primitives registered
Building areas:  100%
1112 areas built
12 isles built
Attaching islands:  100%
Attaching centroids:  100%
Topology was built.
Number of nodes     :   3037
Number of primitives:   4137
Number of points    :   0
Number of lines     :   0
Number of boundaries:   3023
Number of centroids :   1114
Number of areas     :   1112
Number of isles     :   12
Number of duplicate centroids    :   2

### ... So I use v.clean to put duplicate centroids into the error vector file,
so I could find out where they are; but as you can see below the error vector
is empty (though cleaning took place, since there are 2 centroids less and no
duplicates in the output):

$ v.clean input=parcels output=parcels_cl error=parcels_err tool=rmdac
+---------------------------------+---------------+
| Tool                            | Threshold     |
+---------------------------------+---------------+
| Remove duplicate area centroids  | 0.000000e+00 |
+---------------------------------+---------------+
Copying vector lines ...
--------------------------------------------------
Rebuilding parts of topology ...
Building topology ...
4137 primitives registered
Building areas:  100%
1112 areas built
12 isles built
Attaching islands:  100%
Attaching centroids:  100%
Topology was built.
Number of nodes     :   3037
Number of primitives:   4137
Number of points    :   0
Number of lines     :   0
Number of boundaries:   3023
Number of centroids :   1114
Number of areas     :   1112
Number of isles     :   12
Number of duplicate centroids    :   2
--------------------------------------------------
Tool: Remove duplicate area centroids
Duplicate area centroids:     2
--------------------------------------------------
Rebuilding topology for output vector ...
Building topology ...
4135 primitives registered
Building areas:  100%
1112 areas built
12 isles built
Attaching islands:  100%
Attaching centroids:  100%
Topology was built.
Number of nodes     :   3035
Number of primitives:   4135
Number of points    :   0
Number of lines     :   0
Number of boundaries:   3023
Number of centroids :   1112
Number of areas     :   1112
Number of isles     :   12
--------------------------------------------------
Building topology for error vector ...
Building topology ...
0 primitives registered
0 areas built
0 isles built
Attaching islands:
Attaching centroids: Topology was built.
Number of nodes     :   0
Number of primitives:   0
Number of points    :   0
Number of lines     :   0
Number of boundaries:   0
Number of centroids :   0
Number of areas     :   0
Number of isles     :   0

Maciek
Thu, Mar 30 2006 13:58:42    Mail sent by msieczka  
Testing dataset:

http://www.biol.uni.wroc.pl/sieczka/udostepnione/grass/vclean_rmdac.tar.bz2
Maciek
Wed, May 10 2006 20:50:02    Mail sent by msieczka  
As of CVS 2006.05.08, the 'snap' tool doesn't create error layer either. It
would be good if we could now where exctly the snapping took place. A
bug/missing feature?

Maciek
Wed, Jul 26 2006 18:21:56    User changed to tutey@o2.pl by msieczka  
Thu, Oct 5 2006 12:37:41    Mail sent by msieczka  
Same thing regarding rmdangles tool.
Tue, Nov 21 2006 18:20:59    Subject changed to v.clean: several tools don't create the error vector by msieczka  
Tue, Jul 17 2007 16:02:27    Taken by mlanda  
Wed, Jul 18 2007 12:15:10    Status changed to resolved by mlanda  
Wed, Jul 18 2007 12:15:10    Comments added by mlanda  
Fixed in CVS, resolved...
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