Yes, look at the ones included in the library. See one I made as a sample years ago that can encode a LineString as a chain of connected nodes: https://github.com/neo4j-contrib/spatial/blob/master/src/main/java/org/neo4j/gis/spatial/encoders/SimpleGraphEncoder.java
You could copy this and extent it to handle Point, LineString and Polygon. The OSMGeometryEncoder is one that can handle those types, but it uses a more complex graph model you perhaps don't want to be burdened by. I think the graph model I suggested in my earlier mail, and the sample code linked to here, are more appropriate for you. On Thu, Sep 11, 2014 at 3:50 PM, Alireza Rezaei M <alireza...@gmail.com> wrote: > Any example on how to build such customized GeometryEncoder? > > Alireza > > On Thu, Sep 11, 2014 at 3:07 PM, Craig Taverner <cr...@amanzi.com> wrote: > >> >> I want to build a graph out of the result of this query, is there any >>> such >>> solution already in Neo4j, i.e., to recieve a query result as yet >>> another graph not >>> just a list of node? >>> >> >> This sounds very domain specific. What kind of graph do you want? I would >> assume you would need to build whatever graph you want yourself. >> >> However, if the graph you are talking about is the graph structure of the >> geometries themselves, then I recommend my previous suggestion, with a >> custom GeometryEncoder that allows the LineString and Polygon geometries to >> already be graphs. In that case your data model for a three point Polygon >> could be (p)-[:points]->(a)-[:first]->(b)->[:next]->(c)-[:last]->(a), where >> (a), (b) and (c) could all be Point Geometries in your index, and (p) would >> be the polygon containing those three points. The bbox and gtype for each >> point is stored on the a,b,c nodes, and the bbox and gtype of the entire >> polygon is stored on the (p) node, and your GeometryEncoder knows how to >> convert from graphs to Geometry objects and back. >> >> This way you control entirely the data model, while still being able to >> use the spatial library for geometry searches. >> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "Neo4j" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/neo4j/svcOw_S0l1A/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> neo4j+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Best Regards > > Alireza Rezaei Mahdiraji > > -- > 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.
