[GRASSLIST:5650] Re: vector export to GMT->simplify vectors

[Dylan Beaudette]

Sorry about replying to my original post... but I have a bit more information 
to refine my problem:

the 18 "boundaries" are actually 18 line segments that make up the 2 real 
boundaries. 

Thus, the question would then be:

is it possible to convert a set of line segments into a single line...?

thanks!

On Friday 04 February 2005 06:48 pm, Dylan Beaudette wrote:
> Greetings!
>
> I have a simple vector that is composed of 2 areas:
> http://169.237.35.250/~dylan/gmt/ptuff.png
>
> v.info reports:
> |   Number of points:       0               Number of areas:      2
> |   Number of lines:        0               Number of islands:    2
> |   Number of boundaries:   18              Number of faces:      0
> |   Number of centroids:    2               Number of kernels:    0
>
> I am interested in exporting the boundaries that represent the 2 areas in
> this vector with v.out.asci, for useage in GMT...
>
> However, when i run v.out.ascii format=standard ....
>
> I am left with an ascii file that describes all 18 boundaries that exist in
> the vector ptuff.... resulting in a file that is of little use in GMT...
> see the result (blue polygon is the problem one...):
> http://169.237.35.250/~dylan/gmt/geology.png
>
>
> Where do all 18 boundaries come from? How can I only export the ones
> associated with the 2 areas?
>
> Any ideas?
>
> PS I am using GRASS6
>
> Thanks,

-- 
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341