Please what's the procedure or commands for extrating road network from a<br>raster map? i think i have been going round the circle with classofocation<br>and rectification of image. i have used this commands but i don't get any<br>
results:<br>i.group<br>i.composite<br>i.class<br>i.cluster<br>r.digit<br>i.maxlik<br>i.gensigset<br>nothing seems to get me the road network result i want.<br>Please i need help and i am running GRASS on Linux Ubuntu.<br>
thanks.