[GRASS-user] road extraction using grass

[Micha Silver]

Nathaniel Iwuchukwu wrote:

> So far, i have been able to extra road from a satellite imagery but it 
> has broken lines and it also captured buildings. these are the steps i 
> followed to arrive at this stage:
>

Just curious. If you're interested in a vector road layer, why not use 
openstreetmaps?
QGIS, for example, has a plugin to view and download OSM layers.