Spatial Indexing in Neo4j

Posted By : Abhay Garg | 30-Mar-2015

Hello ,

Neo4j Spatial is a library facilitating the import, storage and querying of spatial data in the Neo4j open source graph database

Query Neo4j spatial in Neo4j Console -> If you get this error 

No index provider 'spatial' found. Maybe the intended provider (or one more of its dependencies) aren't on the classpath or it failed to load. 

by running this Query  

START user=node:userLocations(withinDistance:[78.0,29.0,3.45]')return user

then you need to add Neo4j Library in Neo4j lib folder

 

Download neo4j-spatial-0.13-neo4j-2.1.6-server-plugin.zip , extract it and paste all jars into lib folder inside neo4j-community-2.1.7 

 

Now run this Query again  

START user=node:userLocations(withinDistance:[78.0,29.0,3.45]')return user

, and now error might change , but you did not see this error

 

No index provider 'spatial' found. Maybe the intended provider (or one more of its dependencies) aren't on the classpath or it failed to load. 

If you did not see this error then Neo4j is ready to do Spatial Indexing

Runnign Neo4j Spatial Indexing in Grails Project

 

Add mavenRepo in BuildConfig.groovy inside repositories{}

    mavenRepo "https://raw.githubusercontent.com/neo4j-contrib/m2/master/releases"

 

Add Dependency in BuildConfig.groovy inside dependencies {}

        compile "org.neo4j:neo4j-spatial:0.13-neo4j-2.1.6"

 

Add  

@NodeEntity
class UserDomain {

@Indexed(indexType = IndexType.POINT, indexName = userLocations)
 Point wkt

}




in User.groovy Domain 

make sure that Location os user should be named as wkt 

while saving user 

user.wkt= =new Point(lat,lon)

 

Now you find user as per the Locations 

START user=node:userLocations(withinDistance:[78.0,29.0,3.45]')return user

 

For more information https://github.com/neo4j-contrib/spatial

or email : abhay.garg@oodlestechnologies.com

THANKS

 

 

About Author

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Abhay Garg

Abhay is a Grails Developer expertise in OptaPlanner and Angular js framework.

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