On Wed, Mar 18, 2015 at 06:58:06PM -0400, Stefan Steiniger wrote: > Dear GeoCoders, > > I am having a database of traffic accidents. All accidents that > happened at an intersections are described by giving the two street > names. Is there an option to send such a request to Nominatim? > I tried it with "Street A, and, Street B, City", without success. > > Or: Would I have to fetch the geometry of either road and do then > some processing with my client a la JTS: geom.intersect(geom2)? > Assuming a small area -> planar 2D should be fine. > If I need to do it this way: Does "polygon_geojson=1" give me the > complete LineString as in the DB? > > thanks and cheers from Santiago de Chile, > Stefan > > PS: Btw. I am using iPython Notebook, so I guess shapely helps me > here to do the JTS stuff, in case someone knows? > PPS: no worries, I got my own instance of Nominatim sucessfully > installed: thank you for that guide and work!
I had the same problem - accident stats from local police. I uses postgis loaded with the osmosis simple schema. Then you select all ways with name A and make a collection and all ways with name B and then create the nodes with their junction e.g. ST_Intersect. You then end up with one or a few intersection nodes. I interpolated them to a single node if they were less than 60m apart. Otherwise you might have a U shaped street having 2 junctions with the same street. Flo -- Florian Lohoff [email protected] We need to self-defense - GnuPG/PGP enable your email today!
signature.asc
Description: Digital signature
_______________________________________________ Geocoding mailing list [email protected] https://lists.openstreetmap.org/listinfo/geocoding
