Craig, Peter, Its useful if I get the latitude and longitude in the correct order for the Point. Ugh. I've found that SearchPointsWithinOrthodromicDistance, SearchClosest, and SpatialTopologyUtils.findClosestEdges all work for me. Looks like my project is well on its way now, thanks for the help.
Bryce On Sun, Jan 16, 2011 at 3:16 PM, Craig Taverner <[email protected]> wrote: > The SearchPointsWithinOrthodromicDistance basically does a search on a > rectangular bounding box, and then inside the result set filters by > distance > from the center. The filter probably works only on points as implied by the > class name. > > The SpatialTopologyUtils class has a method findClosestEdge, which will do > what you are looking for. If you call it without a distance value, it will > take 1% of the total span of your layer as the search window, so if this > does not make sense for your data (eg. your layer covers a small area, as > you hinted at), then pass in the distance in units of the coordinate system > of the layer (probably WGS84, degrees, if you are using only OSM data). Try > it out and let us know. > > See: > > - > > https://github.com/neo4j/neo4j-spatial/blob/master/src/main/java/org/neo4j/gis/spatial/SpatialTopologyUtils.java > - > > https://github.com/neo4j/neo4j-spatial/blob/master/src/test/java/org/neo4j/gis/spatial/TestSpatialUtils.java > > > On Sun, Jan 16, 2011 at 11:19 AM, Peter Neubauer < > [email protected]> wrote: > > > Bryce, > > I think (Craig, correct me if I'm wrong) you need to have a Point > > layer to be able to do that search. The default OSM layer is > > containing a lot of geometries, so I think you first should define a > > layer on top of the full imported one, then search. I did something > > like that in another spike, see > > > > > https://github.com/popdevelop/snapplr/blob/master/server_java/src/main/java/com/geosnappr/TaginfoImporter.java#L312 > > > > The layer is defined with something like > > > > > https://github.com/neo4j/neo4j-spatial/blob/master/src/test/java/org/neo4j/gis/spatial/TestDynamicLayers.java#L26 > > on top of the imported full data layer. > > > > Does that help? > > > > Cheers, > > > > /peter neubauer > > > > GTalk: neubauer.peter > > Skype peter.neubauer > > Phone +46 704 106975 > > LinkedIn http://www.linkedin.com/in/neubauer > > Twitter http://twitter.com/peterneubauer > > > > http://www.neo4j.org - Your high performance graph > database. > > http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party. > > > > > > > > On Sat, Jan 15, 2011 at 10:58 PM, bryce hendrix <[email protected]> > > wrote: > > > I'm pretty new to neo4j, so please excuse me if this is a FAQ. > > > > > > I exported OSM data for a city from the OSM site, then imported it > using > > the > > > OSMImporter. I can see the layer via the webserver, so I know if got > > > imported okay. Now I would like to find the way nearest to a coordinate > > via > > > the Java API, but I'm not really sure how to do that. I've tried using > > > SearchPointsWithinOrthodromicDistance, but the results of the query are > > > always empty. Can someone give me some tips, or provide a simple > example? > > > > > > Thanks in advance, > > > Bryce > > > _______________________________________________ > > > Neo4j mailing list > > > [email protected] > > > https://lists.neo4j.org/mailman/listinfo/user > > > > > _______________________________________________ > > Neo4j mailing list > > [email protected] > > https://lists.neo4j.org/mailman/listinfo/user > > > _______________________________________________ > Neo4j mailing list > [email protected] > https://lists.neo4j.org/mailman/listinfo/user > _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
