[GRASS-user] v.in.ascii incorrect boundaries
Morten Sickel
Morten.Sickel at nrpa.no
Wed Jul 25 10:04:08 EDT 2007
I am trying to define a map using v.in.ascii. The map is basically a few
squares in the northern atlantic ocean defined in Lat lon, So I have
made this input file:
MAP NAME: hav
MAP DATE: 2007
VERTI:
B 5 1
-12 81
3 81
3 73.5
-12 73.5
-12 81
1 26
B 5 1
-12 71
3 71
3 73.5
-12 73.5
-12 71
1 38
B 5 1
-7 71
3 71
3 68
-7 68
-7 71
1 36
B 5 1
-7 71
-12 71
-12 68
-7 68
-7 71
1 35
and then I save it at Havomrder.txt and import it using
v.in.ascii --o input=Havomrder.txt output=hav fs=' ' format=standard
and get the following messages:
Building topology ...
4 primitives registered
Building areas: 100%
2 areas built
2 isles built
Attaching islands: 100%
Attaching centroids: 100%
Topology was built.
Number of nodes : 3
Number of primitives: 4
Number of points : 0
Number of lines : 0
Number of boundaries: 4
Number of centroids : 0
Number of areas : 2
Number of isles : 2
Number of incorrect boundaries : 2
Number of areas without centroid : 2
I thought I should have gotten 4 areas build and no isles and I do not
understand why I get the two last lines. Does it matter if I define the
areas CW or CCW? I have tried to remove the .5 and to save the file both
as a dos and unix file without any help.
I am running grass 6.2.2 on a Cygwin / win Xp system.
When displaying the file (d.vect hav), I get lines that looks
reasonable, but no vertexes or centroides, when using d.what.vect, I get
feature type Area but I never get any id when clicking in the uppermost
largest square and in the other three, I get (seemingly) randomly
categories 26, 38 and 36 wiht feature type Boundary...
I cannot see from the help file for v.in.ascii what may be wrong.
thanks
Morten Sickel
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