> I am specifically trying to get legngth downslope
> to a watershed outlet.
> 
...
> 
> 1. does a script or program exist to display a flow line as
> well as calculate it's length to the outlet that is more 
> accurate? (based on the DEM)
> 

Perhaps I can partially help - have a look at r.flow program placed
on moon server. It uses a raster/vector approach in construction
of flow lines and calculates also flowpath lengths. Play with
s.surf.tps /more smoothing and so on/ to get smoother DEM with less
depressions.

Good Luck,

Jaro


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Jaro Hofierka
Dept. of Cartography, Geoinformatics & Rem. Sensing
Comenius University
842 15 Bratislava
Slovakia			E-mail: hofierka@devin.fns.uniba.sk
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