That's your call. The subject has changed a lot, so you could write a new one, but if you want all this discussion together, keep this one.
On Thu, Sep 11, 2014 at 4:01 PM, Alireza Rezaei M <[email protected]> wrote: > Thanks a lot Craig, > I will look at it and perhaps come back with some questions. In that case, > should I write in this post > or create a new one? > > Alireza > > On Thu, Sep 11, 2014 at 3:55 PM, Craig Taverner <[email protected]> wrote: > >> 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 <[email protected]> >> wrote: >> >>> Any example on how to build such customized GeometryEncoder? >>> >>> Alireza >>> >>> On Thu, Sep 11, 2014 at 3:07 PM, Craig Taverner <[email protected]> >>> 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 >>>> [email protected]. >>>> 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 [email protected]. >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- >> 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 >> [email protected]. >> 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 [email protected]. > 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
