[GRASS-user] v.net.salesman unreachable nodes

[sebastian sauer]

Fri 03 Aug 2007 10:37, Joseph Guillaume wrote:
> I'm trying to run a travelling salesman analysis between point features on a
> road map, but it tells me that two nodes are unreachable from one another,
> which is a fatal error.
yes, i too guess vertex A is not connected with vertex B for some
reason.. 

..sometimes the problem is quite subtle, like not matching charsets while
importing data http://pgrouting.postlbs.org/discussion/12/27
etc..

there's some high-quality sample data available (download "Premium", free
registation required) which you could use to check if the issue is really 
GRASS or your own (faulty) data ..
http://www.adci.com/samples/navteq.html

> find an OSS alternative that works on Debian - and it seems GRASS is the
> only software currently able to do network analyses.
NAK, have there's also http://pgrouting.postlbs.org/.