[GRASS-user] v.net.iso setup - whats missing?

GRASS GRASS user
1

I am having trouble getting this function to work properly. I ran the v.net
function to connect my centres to my network (presumably sucsessfully). Then
i input the arc file and centre (point) files into the alayer=1, nlayer=2
respectivly, set my categories and distances, and when i run it, nothing is
allocated. My output network's attribute table consists of one column, with
a row for each line segment, and 1's for each segment... However, the roads
that are inaccessible b/c of region clip are removed, so i beleive the
routing process is running, i just cant seem to get it to split the network
using distances... I think i am missings something fairly simple, but cannot
seem to get it... Any help is much appreciated; i have been trying to figure
this out through trial and error for over a week, and am getting tired! :confused:

Cheers,
Evan

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2

On Wed, Jun 22, 2011 at 5:25 AM, RKiTect <evan.apostol@gmail.com> wrote:

I am having trouble getting this function to work properly. I ran the v.net
function to connect my centres to my network (presumably sucsessfully).

You used v.net operation=connect ?

Then
i input the arc file and centre (point) files into the alayer=1, nlayer=2
respectivly, set my categories and distances, and when i run it, nothing is
allocated.

It is not clear what you mean with files, can you post the command you
used? The output of v.net must be the input for v.net.iso, and the
numbers used for alayer and nlayer with v.net.iso must be the same
like those used with v.net.

My output network's attribute table consists of one column, with
a row for each line segment, and 1's for each segment... However, the roads
that are inaccessible b/c of region clip are removed, so i beleive the
routing process is running, i just cant seem to get it to split the network
using distances... I think i am missings something fairly simple, but cannot
seem to get it... Any help is much appreciated; i have been trying to figure
this out through trial and error for over a week, and am getting tired! :confused:

Have you tried different distances (the costs option of v.net,iso)?

Markus M