[GRASS5] [bug #4225] (grass) v.clean: rmdac tool doesn't create the error vector

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this bug's URL: http://intevation.de/rt/webrt?serial_num=4225
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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


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