On 26 April 2010 15:13, Jerry Clough - OSM <[email protected]> wrote:
> GRASS seems to have some kind of Voronoi algorithm, but I find its > interface very non-intuitive, so have not found it to try it out. This may > be worth pursuing as an alternative route. > > As an aside: I notice that virtually all postcode boundaries are obviously > created in this way. For instance the Philips Street Atlas shows totally > implausible boundaries along the River Trent in S. Notts. Given that > postcode boundaries are ultimately determined by logistically sensible walks > for postmen, in this case it's pretty safe to assume that the boundary is > actually the river. What this means is that by applying a bit of local > knowledge and the existing points it is possible to create better > delineating zones in OSM than appear in current mapping. Whether this is a > good thing to do, or not, I leave for others to decide. > > I think that GEOS has now implemented both voronoi and Delaunay triangulation algorithms. I am not quite though that they have a Python Binding. Some part of GEOS is expose through the GDAL binding, but it is incomplete. Emilie Laffray
_______________________________________________ Talk-GB mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-gb
