[GRASSLIST:662] Re: Drive time analysis in GRASS?

[Radim Blazek]

On Wednesday 09 July 2003 01:41, Brian McEntire wrote:
> Hello folks,
>   I am interested in using GRASS/GIS to draw 5 minute driving time or
> driving distance contour lines around a point. I believe a good amount of
> road information is available in either of these sources:
>
>   1) National Highway Planning Network - "(NHPN) is a 1:100,000 scale
> network database that contains line features representing just over
> 450,000 miles of current and planned highways in the U.S. The NHPN
> consists of interstates, principal arterials, and rural minor arterials."
>   [The file is available in ARC/INFO Interchange (.e00) format.]
>
>   or 2) US Censes TIGER/Line 2k maps from the US Census
>
>
> Does anyone know if a GRASS module has already been developed to
> implement this? Or if implementing this in GRASS is a good idea to begin
> with? I don't want to reinvent the wheel, but I haven't turned up any
> open source or low cost applications that can do this.

v.net.iso / 5.1
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Radim