On Thu, Aug 28, 2014 at 10:32 PM, James Keener <[email protected]> wrote: > 6.4.3 sorry about not including that from the start. > > On August 28, 2014 3:42:45 PM EDT, Markus Neteler <[email protected]> wrote: ... >> On Thu, Aug 28, 2014 at 1:40 PM, James Keener <[email protected]> wrote: >>> >>> I'm trying to create a map with isolines for the road-distance places >>> are from bus routes. I was trying to roughly follow >>> >>> http://jcastellssala.wordpress.com/2012/05/07/basic-network-analysis-with-grass/
(nice tutorial, btw) Note that their projection is in meters, while... >>> I am using the following shapefiles in SRID 2272 (NAD83 / Pennsylvania >>> South (ftUS)): ... your's is in US feet (http://epsg.io/2272). This affect the threshold you use below: ... >>> So, the first thing I did is import these files: ... >>> Then I connect the stops to the network >>> >>>> v.net input=roads points=stops output=network operation=connect >>>> thresh=500 Note that the threshold is specified in map units (so, here feet in your case). Sidenote: in GRASS GIS 7 the module is a bit more advanced: http://grass.osgeo.org/grass70/manuals/v.net.html Perhaps (guessing, I didn't have time to test your data), the initial threshold makes the difference? Best, Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
