I did not answer everything. But the JTS distance method will work for all geometries, so that answers most of your questions.
The GeoPipeline methods also provide ways to find objects within distances of other objects (using the rtree for optimized searches). And it provides sorting too, so you can, for example, search for everything within some maximum bounds, sort by distance and pick the closest 'k' elements. On Tue, Sep 23, 2014 at 8:14 PM, Craig Taverner <cr...@amanzi.com> wrote: > The distance is calculated best using JTS. For example: > double distance = pointA.distance(pointB) > > See > http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/geom/Geometry.html#distance(com.vividsolutions.jts.geom.Geometry) > > On Tue, Sep 23, 2014 at 3:26 PM, Alireza Rezaei Mahdiraji < > alireza...@gmail.com> wrote: > >> >> Hi All, >> >> Given two geometries how do compute the distance between >> them in neo4j spatial? For instance given two points stored in two nodes? >> >> What other kind of distance are defined? For instance, is it possible to >> find >> distance between a point and a linestring/polygon or distance between two >> polygons? >> >> Related to the concept of distance, it is possible to find objects within >> a given distance of a >> given object. But what about computing knn, i.e., finding k elements >> which are closets to the >> given object? Shall we compute all distances and then pick top k or there >> is implemented >> and optimized way to do this? >> >> Thanks, >> Best, >> Alireza >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Neo4j" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to neo4j+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
