On Thu, Mar 29, 2012 at 8:40 AM, Richard Weait <[email protected]> wrote: > On Wed, Mar 28, 2012 at 8:48 AM, Ian Dees <[email protected]> wrote: >> On Wed, Mar 28, 2012 at 5:47 AM, Josh Doe <[email protected]> wrote: > > [ ... ] >>> I was thinking more about using TIGER 2011 >>> to find roads that seem to be missing in the OSM database. My PostGIS >>> skills are nil, but it seems like it should be a fairly trivial query >>> to buffer the >>> OSM ways and find TIGER segments which don't intersect the buffered ways. > [ ... ] >> I started playing with this last night and ended up with the Chicago area >> metro extract from Mike and the Cook County TIGER roads data as layers in >> QGIS. Next up is to play with various queries to find missing roads in OSM. >> I like the idea of buffer and joining as a start and will probably move over >> to PostGIS to do that. > > We used OpenJUMP and the RoadMatcher plugin in the early days of > Canadian imports to generate lists of matching or missing roads.
I've actually just converted the conflation JOSM-plugin to use the Java Conflation Suite (JCS), which RoadMatcher is based on. I don't expect to have RoadMatcher-like capabilities in there for quite a while, but I should soon at least be able to find which segments don't have a match in OSM based on string similarity (e.g. Levenshtein) and curve similarity (e.g. Hausdorff, Frechet). -Josh _______________________________________________ Talk-us mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-us
