[GRASS-user] problem on vectorizing a float point raster

Milton Cezar Ribeiro miltinho.astronauta at gmail.com
Tue Jun 9 16:59:49 EDT 2009

Dear Grass-Gurus,

I have a 2400x2200 raster image with values ranging
from 0.1 to 42, in float format. Now I need
vetororize the image, on the way that each pixel
come to be a polygon and the pixel value be stored as

I am trying to do this using:
r.to.vect input=temp71.img output=temp71_img_integer_vect_200m --o -b

but grass return the following error messages:

GRASS 6.4.0svn (newLocation):C:/GRASS-6-SVN/msys/home/mjfortin > r.to.vect
t=temp71.img output=temp71_img_integer_vect_200m --o -b
WARNING: Vector map <temp71_img_integer_vect_200m> already exists and will
         be overwritten
WARNING: Table <temp71_img_integer_vect_200m> linked to vector map
         <temp71_img_integer_vect_200m> does not exist
Extracting lines...
ERROR: Raster map is not thinned properly.
       Please run r.thin.
By the way, I am running grass under a WinXp 64bit.
Any help are welcome.


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