[GRASSLIST:7046] Re: vector map from scanned streetmap

[Jachym Cepicky]

well,
one could do it by

r.mapcalc streets="if(input == color, 1, null())"
r.thin in=streets out=streets.th
r.to.vect feature=line in=streets.th out=streets
v.clean in=streets out=streets2 tool=prune

Jáchym

On Tue, Jun 07, 2005 at 09:14:30AM +0100, dooshiant wrote:
> Hi all,
> 
> I am new to using GIS and would like some help with GRASS 6.0.
> I am trying to digitise old streetmaps into vector format. The scanned
> images are in TIFF/PNG format and I want to draw vector graphics from
> them. Any hint of the best way of doing this? Is there any online
> documentation/tutorials you could point me to?
> 
> Thanks & regards,
> 
> dooshiant
> 
> 
> 	
> 	
> 		
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-- 
Jachym Cepicky
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