[Qgis-user] How to convert raster routes into vector format?

[Havard Tveite]

If you are going to use GRASS r.to.vect (for instance through QGIS
Processing), you will need a binary skeleton image.
You could get one by using the raster calculator to extract
your single colour as a binary image, and then GRASS r.thin
(available in QGIS Processing) to get the skeleton.

Håvard

On 29/7/2015 8:36:AM, Nick Papadonis wrote:
> Hi Folks,
>
> I have a map with numerous trails in a single color and would like to vectorize these.  Is there a mode Qgis can be placed in such that a color can be selected for inclusion in the vectorization process?  I.e. to make converting these routes to vector format easier?
>
> Thanks again
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