[GRASSLIST:4892] Re: adding mile markers to curvy roads

[David Mahoney]

It seems to me I did this in GRASS 5.0 using r.cost and r.mapcalc. I 
can't remember the exact sequence, but you set the pixel value of the 
the roads to something equal to the cell resolution. Then you can use 
r.cost to generate a map that shows the cumulative distances between 
each cell and a input point, your starting point. Use r.mapcalc to 
select out only the cells that are an even multiple of a mile, and 
convert them to sites. Not a vector solution, such as is all the rage 
now, but effective.

Dave

On Friday, November 19, 2004, at 07:56 PM, Dan Jacobson wrote:

> I seems all the neat solutions mentioned are not available here in
> ancient Debian sid grass 5.0.3.  Don't have the bandwidth to download
> source nor the brains to compile. Maybe instead I can give the roads a
> constant incline, and then create contour labels or something.