[GRASS-user] Re: Drivetime Isochrones

[Markus Metz]

On Sat, Jun 25, 2011 at 8:02 PM, RKiTect <evan.apostol at gmail.com> wrote:
> i think i have figured out where my problem lies. It is in the centre node
> costs... from the manual is says right at the top that centre node must be
> opened (costs >= 0). however i have not defined costs for the centre node at
> any point... could this be the issue? how do i go about defining costs for
> the centre node?
>
Defining costs or a cost column for nodes is not needed. If no cost
column is given, a cost value of 0 (zero) is used for nodes, which is
most of the time ok.

It would help a lot if you could post the commands and the output,
then it is much easier to figure out what goes wrong. You can cut and
paste the output from the GUI output window. The command can be copied
by clicking on the copy button.

Markus M