[GRASS-user] Tobler's hiking function

[mlage at usal.es]

Hello Hamish.
There are several anisotropic functions. Each one produces different
results. For the accumulated cost surfaces I most generate Tobler’s Hiking
Function will produce more accurate results.
Thank you anyway.


----- Original Message -----
From: "Hamish" <hamish_nospam at yahoo.com>
To: <mlage at usal.es>
Cc: <grassuser at grass.itc.it>
Sent: Thursday, January 25, 2007 11:12 PM
Subject: Re: [GRASS-user] Tobler's hiking function


>> I am trying to express Tobler's Hiking Function with r.mapcalc.
>
> see also "r.walk":
> "Outputs a raster map layer showing the anisotropic cumulative cost of
> moving between different geographic locations on an input elevation
> raster map layer whose cell category values represent elevation combined
> with an input raster map layer whose cell values represent friction
> cost."
>
>
>
> Hamish
>