[Qgis-user] Re: [GRASS-user] image vectorization

[Markus Neteler]

On Sat, Nov 13, 2010 at 9:05 PM, ambrish dhaka <ambijat at hotmail.com> wrote:
> Hi All,
> I have tried to process a LANDSAT TM image for finer identification of
> features. The area represent the lower Ferghana valley region. See image
> attached. The difficulty is how to proceed further.
> I cannot create vector lines for the following reasons. r.thin does not
> produce neatly, vectorization produces intense line with poor feature
> demarcation. Can some efficient steps be suggested.

If you use GRASS 7, r.thin has been improved as of today by Markus Metz.

Markus