Re: [Neo4j] path finding using OSM ways
craig.taverner wrote > > ... > - Create a way-point node for these > ... > Hi together, I wonder why to add extra nodes to the graph (if I understand Craig correctly)? Wouldn't you then end up in expanding twice the node count (way-point nodes and OSM nodes themself, because you have to query the OSM id (or any other identification value of the end node) in every expand and lat / lon if you don't have precompiled edge weights)? I would just connect the OSM nodes directly with new edges to form a routing subgraph. Best Regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-path-finding-using-OSM-ways-tp3004328p3564688.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Now I missed another important point: With that settings the database would still not return any results. I changed the bounding box values to 9.9 and 48.4. I then got an error message with insufficient heap space. With more digits it would load even more from the R-tree. I increased the cache sizes from the standard few megabytes to several hundreds of megabytes and now can do the queries. (600k nodes, 1M properties, 1M relationships) -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3548384.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter,
the tests are running and now I get the following results:
cypher> start n=node:geom('bbox:[9.9996186, 9.9996186, 48.4027913,
48.4027913]')
cypher> return n
cypher>
==> +--+
==> | n|
==> +--+
==> | Node[205373]{vertices->1,bbox->[D@4613e058,gtype->1} |
==> +--+
==> 1 rows, 194 ms
http> POST /db/data/ext/SpatialPlugin/graphdb/findGeometriesInLayer
{"layer":"geom","minx":9.9996186,"maxx":9.9996186,"miny":48.4027913,"maxy":48.4027913}
==> 200 OK
==> [ {
==> "outgoing_relationships" :
"http://localhost:7474/db/data/node/205373/relationships/out";,
==> "data" : {
==> "bbox" : [ 9.9996186, 9.9996186, 48.4027913, 48.4027913 ],
==> "vertices" : 1,
==> "gtype" : 1
==> },
==> "traverse" :
"http://localhost:7474/db/data/node/205373/traverse/{returnType}";,
==> "all_typed_relationships" :
"http://localhost:7474/db/data/node/205373/relationships/all/{-list|&|types}",
==> "property" :
"http://localhost:7474/db/data/node/205373/properties/{key}";,
==> "self" : "http://localhost:7474/db/data/node/205373";,
==> "properties" : "http://localhost:7474/db/data/node/205373/properties";,
==> "outgoing_typed_relationships" :
"http://localhost:7474/db/data/node/205373/relationships/out/{-list|&|types}",
==> "incoming_relationships" :
"http://localhost:7474/db/data/node/205373/relationships/in";,
==> "extensions" : {
==> },
==> "create_relationship" :
"http://localhost:7474/db/data/node/205373/relationships";,
==> "paged_traverse" :
"http://localhost:7474/db/data/node/205373/paged/traverse/{returnType}{?pageSize,leaseTime}";,
==> "all_relationships" :
"http://localhost:7474/db/data/node/205373/relationships/all";,
==> "incoming_typed_relationships" :
"http://localhost:7474/db/data/node/205373/relationships/in/{-list|&|types}"
==> } ]
To get to this point I have to follow exactly the following steps:
1. Create a new database
2. Run the OSMImporter and name the layer 'geom' (Cypher don't like "\ / :")
-> separate osmPath and Layername in importer
3. Start the server and call the following through HTTP:
http> POST /db/data/ext/SpatialPlugin/graphdb/addSimplePointLayer
{"layer":"geom", "lat":"lat", "lon":"lon"}
==> 200 OK
==> [ {
==> "outgoing_relationships" :
"http://localhost:7474/db/data/node/582567/relationships/out";,
==> "data" : {
==> "layer_class" : "org.neo4j.gis.spatial.osm.OSMLayer",
==> "layerprops" : [ "FIXME", "TMC:cid_58:tabcd_1:Class",
"TMC:cid_58:tabcd_1:Direction", "TMC:cid_58:tabcd_1:LCLversion",
"TMC:cid_58:tabcd_1:LocationCode", "TMC:cid_58:tabcd_1:NextLocationCode",
"TMC:cid_58:tabcd_1:PrevLocationCode", "access", "addr:city",
"addr:country", "addr:housenumber", "addr:postcode", "addr:state",
"addr:street", "admin_level", "agricultural", "alt_name", "amenity", "area",
"asb", "atm", "backrest", "barrier", "bell", "bench", "bicycle",
"bicycle_parking", "boundary", "brand", "bridge", "building",
"building:cladding", "building:height", "building:levels", "building:roof",
"building:type", "building:use", "bus", "cables", "capacity",
"capacity:disabled", "class:bicycle", "collection_times", "covered",
"created_by", "crossing", "crossing_ref", "cuisine", "cutting", "cycleway",
"denomination", "denotation", "description", "destination", "detail",
"direction", "ele", "electrified", "email", "emergency", "fax", "fee",
"fixme", "foot", "frequency", "from", "gauge", "grade", "hgv", "highway",
"historic", "history", "horse", "hour_off", "hour_on", "incline", "int_ref",
"is_in", "junction", "landuse", "lanes", "layer", "leisure", "light", "lit",
"man_made", "material", "maxheight", "maxspeed", "maxspeed:source",
"maxweight", "moped", "motor_vehicle", "motorcar", "motorcycle",
"motorroad", "mtb:scale", "name", "natural", "network", "noexit", "note",
"note:de", "office", "oneway", "onkz", "openGeoDB:auto_update",
"openGeoDB:community_identification_number", "openGeoDB:is_in",
"openGeoDB:is_in_loc_id", "openGeoDB:layer", "openGeoDB:license_plate_code",
"openGeoDB:loc_id", "openGeoDB:name", "openGeoDB:sort_name",
"openGeoDB:version", "opening_hours", "operator", "park_ride", "parking",
"payment:coins", "payment:telephone_cards", "phone", "place", "postal_code",
"power", "power:type", "priority", "psv", "public_transport", "rail",
"railway", "recycling:clothes", "recycling:glass", "recycling:paper", "ref",
"ref:color", "religion", "restriction", "route", "sac_scale", "segregated",
"service", "shelter", "shop", "smoking", "smoothness", "source",
"source:lit", "source:maxspeed", "sport", "surface", "tactile_paving", "to",
"tourism", "tracks", "tracktype", "traffic_sign", "trail_visibility",
"tram", "tunnel", "type", "usability:skate", "vehicle", "vending",
"voltage", "waterway", "website", "wheelchair", "wheelchair:description",
"width", "wikipedia", "wires
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter, that works, yes! But I still can't do spatial queries with the OSMLayer over the server page. Today I have written a small test program in Java which also includes a bbox query for a specific point and then traverses to the corresponding OSM node. So far I am satisfied with that (I will also continue in Java), maybe you can still get this 'issue' to work at your side - or I just don't get it :) Regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3542618.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] path finding using OSM ways
Hi together, Maybe I am bit late on this topic but how is the progress so far? Greetz, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-path-finding-using-OSM-ways-tp3004328p3542322.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Thanks Peter! -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3536012.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter, unfortunately I can't get it to work. The layer named after osmpath could not be used in query because of ':' and '/'. I don't know how to escape them here. However I did not like the layer to be named in this way, so I changed the OSMImporter to take 'layerName' and 'osmPath'. I now import the OSM file with the layer named 'geom' and added the indexprovider. A bbox query now stops with "GC overhead limit exceeded" :/ Can you please verify the OSMimport with bbox query over Cypher / HTTP? Regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3535681.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter,
I now have a graph with the 'geom' index + testnode from the above code and
imported some OSM data afterwards. I now want to find 2 nodes by bbox query
- 550349 and 205372 (see http://dl.dropbox.com/u/18693700/graph.png). How
can I achieve this? If I query for the bbox I should at least find the
corresponding GEOM nodes and then traverse over the incoming edge?
I can for example do the following:
cypher> start n=node:node(way_osm_id = '119810554')
cypher> return n
cypher>
==>
+--+
==> | n
|
==>
+--+
==> |
Node[550349]{way_osm_id->119810554,oneway->"BOTH",timestamp->1309673329000,highway->"residential",name->"Frauenstraße",version->"2"}
|
==>
+--+
==> 1 rows, 168 ms
In the posts before I could query the geometry with index 'geom'. The index
manager only has the following entries:
node lucene {"_blueprints:type":"MANUAL", "type":"exact"}
relation lucene {"_blueprints:type":"MANUAL", "type":"exact"}
geom spatial {"_blueprints:type":"MANUAL"}
way lucene {"_blueprints:type":"MANUAL", "type":"exact"}
changeset lucene {"_blueprints:type":"MANUAL", "type":"exact"}
user lucene {"_blueprints:type":"MANUAL", "type":"exact"}
I also have uploaded the complete folder of Neo4j spatial + graph.db:
http://dl.dropbox.com/u/18693700/neo4j_spatial_osm_graphdb.rar
Regards, Daniel
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Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter,
I have posted the statements in 1 line, but no success with cURL. I think I
have messed up the database at work, it was allready filled with nodes from
OSM testing. I now started a new database at home and also included one
additional line:
http> POST /db/data/ext/SpatialPlugin/graphdb/addSimplePointLayer
{"layer":"geom", "lat":"lat", "lon":"lon"}
http> POST http://localhost:7474/db/data/index/node/ {"name":"geom",
"config":{"provider":"spatial"}}
http> POST http://localhost:7474/db/data/node {"lon": 15.2, "lat": 60.1}
http> POST
http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addNodeToLayer
{"layer":"geom","node":"http://localhost:7474/db/data/node/5"}
http> POST /db/data/ext/SpatialPlugin/graphdb/findGeometriesInLayer
{"layer":"geom","minx":15.0,"maxx":15.3,"miny":60.0,"maxy":60.2}
==> 200 OK
==> [ {
==> "outgoing_relationships" :
"http://localhost:7474/db/data/node/5/relationships/out";,
==> "data" : {
==> "lon" : 15.2,
==> "bbox" : [ 15.2, 60.1, 15.2, 60.1 ],
==> "gtype" : 1,
==> "lat" : 60.1
==> },
==> "traverse" :
"http://localhost:7474/db/data/node/5/traverse/{returnType}";,
==> "all_typed_relationships" :
"http://localhost:7474/db/data/node/5/relationships/all/{-list|&|types}",
==> "property" : "http://localhost:7474/db/data/node/5/properties/{key}";,
==> "self" : "http://localhost:7474/db/data/node/5";,
==> "properties" : "http://localhost:7474/db/data/node/5/properties";,
==> "outgoing_typed_relationships" :
"http://localhost:7474/db/data/node/5/relationships/out/{-list|&|types}",
==> "incoming_relationships" :
"http://localhost:7474/db/data/node/5/relationships/in";,
==> "extensions" : {
==> },
==> "create_relationship" :
"http://localhost:7474/db/data/node/5/relationships";,
==> "paged_traverse" :
"http://localhost:7474/db/data/node/5/paged/traverse/{returnType}{?pageSize,leaseTime}";,
==> "all_relationships" :
"http://localhost:7474/db/data/node/5/relationships/all";,
==> "incoming_typed_relationships" :
"http://localhost:7474/db/data/node/5/relationships/in/{-list|&|types}"
==> } ]
After a restart of the server I could also do the following :)
cypher> start n=node:geom('bbox:[15.2, 15.2, 60.1, 60.1]')
cypher> return n
cypher>
==> +-+
==> | n |
==> +-+
==> | Node[5]{lon->15.2,lat->60.1,gtype->1,bbox->[D@7e64eff0} |
==> +-+
==> 1 rows, 44 ms
Tomorrow I am going to achieve this state on the other machine and then look
how it works with the OSM data. Well after that "schwere Geburt" I am happy
with the progress :) Thanks so far.
Best regards, Daniel
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Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter,
first cURL doesn't like me:
C:\>curl -X POST
http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addSimplePointLayer
{
"message" : "Mandatory argument \"layer\" not supplied.",
"exception" : "java.lang.IllegalArgumentException: Mandatory argument
\"layer\" not supplied.",
"stacktrace" : [
"org.neo4j.server.plugins.ParameterExtractor.extract(ParameterExtractor.java:47)",
"org.neo4j.server.plugins.PluginMethod.invoke(PluginMethod.java:53)",
"org.neo4j.server.plugins.PluginManager.invoke(PluginManager.java:168)",
"org.neo4j.server.rest.web.ExtensionService.invokeGraphDatabaseExtension(ExtensionService.java:300)",
"org.neo4j.server.rest.web.ExtensionService.invokeGraphDatabaseExtension(ExtensionService.java:122)",
"sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)",
"sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)",
"sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)",
"java.lang.reflect.Method.invoke(Method.java:597)", "com.sun.jersey.
spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)",
"com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:205)",
"com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)",
"com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288)",
"com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)",
"com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)",
"com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)",
"co
m.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)",
"com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469)",
"com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400)",
"com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)",
"com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)",
"com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)",
"com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)",
"com.sun.jersey.spi.container.servlet.ServletContai
ner.service(ServletContainer.java:699)",
"javax.servlet.http.HttpServlet.service(HttpServlet.java:820)",
"org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)",
"org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)",
"org.neo4j.server.statistic.StatisticFilter.doFilter(StatisticFilter.java:62)",
"org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)",
"org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)",
"org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)",
"org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)",
"org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)",
"org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)",
"org.mortbay.jetty.Server.handle(Server.java:326)",
"org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)",
"org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)",
"org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)",
"org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)",
"org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)",
"org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)",
"org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)"
]
}
C:\>-H "Content-Type:application/json" -d '{"layer":"geom", "lat":"lat",
Der Befehl "-H" ist entweder falsch geschrieben oder
konnte nicht gefunden werden.
C:\>"lon":"lon"}'
Die Syntax für den Dateinamen, Verzeichnisnamen oder die
Datenträgerbezeichnung ist falsch.
C:\>curl -X POST
http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addSimplePointLayer
-H "Content-Type:application/json" -d '{"layer":"geom", "lat":"lat",
"lon":"lon"}'
{
"message" : "Unexpected character (''' (code 39)): expected a valid value
(number, String, array, object, 'true', 'false' or 'null')\n at [Source:
java.io.StringReader@c6ac0be; line: 1, column: 2]",
"exception" : "org.neo4j.server.rest.repr.BadInputException: Unexpected
character (''' (code 39)): expected a valid value (number, String, array,
object, 'true', 'false' or 'null')\n at [Source:
java.io.StringReader@c6ac0be; line: 1, column: 2]",
"stacktrace" : [
"org.neo4j.server.rest.repr.formats.JsonFormat.readMap(JsonFormat.java:91)",
"org.neo4j.server.rest.repr.RepresentationFormat.rea
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter,
I am more stuck today than yesterday oO I can't get the index to appear in
the indexmanager any more. First I dropped the database and started from
zero:
C:\neo4j-community-1.5\bin>Neo4j.bat start
SERVICE_NAME: Neo4j-Server
TYPE : 10 WIN32_OWN_PROCESS
STATE : 2 START_PENDING
(NOT_STOPPABLE, NOT_PAUSABLE,
IGNORES_SHUTDOWN)
WIN32_EXIT_CODE: 0 (0x0)
SERVICE_EXIT_CODE : 0 (0x0)
CHECKPOINT : 0x0
WAIT_HINT : 0x7d0
PID: 2132
FLAGS :
C:\neo4j-community-1.5\bin>b:
B:\>curl http://localhost:7474/db/data/
{
"relationship_index" : "http://localhost:7474/db/data/index/relationship";,
"node" : "http://localhost:7474/db/data/node";,
"relationship_types" : "http://localhost:7474/db/data/relationship/types";,
"neo4j_version" : "1.5",
"batch" : "http://localhost:7474/db/data/batch";,
"extensions_info" : "http://localhost:7474/db/data/ext";,
"node_index" : "http://localhost:7474/db/data/index/node";,
"reference_node" : "http://localhost:7474/db/data/node/0";,
"extensions" : {
"CypherPlugin" : {
"execute_query" :
"http://localhost:7474/db/data/ext/CypherPlugin/graphdb/execute_query";
},
"SpatialPlugin" : {
"addEditableLayer" :
"http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addEditableLayer";,
"addCQLDynamicLayer" :
"http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addCQLDynamicLayer";,
"updateGeometryFromWKT" :
"http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/updateGeometryFromWKT";,
"findGeometriesInLayer" :
"http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/findGeometriesInLayer";,
"addGeometryWKTToLayer" :
"http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addGeometryWKTToLayer";,
"getLayer" :
"http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/getLayer";,
"addSimplePointLayer" :
"http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addSimplePointLayer";,
"addNodeToLayer" :
"http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addNodeToLayer";
},
"GremlinPlugin" : {
"execute_script" :
"http://localhost:7474/db/data/ext/GremlinPlugin/graphdb/execute_script";
}
}
}
B:\>curl -d "layer=geom&lon=lon&lat=lat"
http://localhost:7474/db/data/ext/SpatialPlugin/graphdb/addSimplePointLayer
[ {
"outgoing_relationships" :
"http://localhost:7474/db/data/node/2/relationships/out";,
"data" : {
"layer_class" : "org.neo4j.gis.spatial.EditableLayerImpl",
"layer" : "geom",
"geomencoder" : "org.neo4j.gis.spatial.encoders.SimplePointEncoder",
"geomencoder_config" : "lon:lat",
"ctime" : 1322045456422
},
"traverse" : "http://localhost:7474/db/data/node/2/traverse/{returnType}";,
"all_typed_relationships" :
"http://localhost:7474/db/data/node/2/relationships/all/{-list|&|types}",
"property" : "http://localhost:7474/db/data/node/2/properties/{key}";,
"self" : "http://localhost:7474/db/data/node/2";,
"properties" : "http://localhost:7474/db/data/node/2/properties";,
"outgoing_typed_relationships" :
"http://localhost:7474/db/data/node/2/relationships/out/{-list|&|types}",
"incoming_relationships" :
"http://localhost:7474/db/data/node/2/relationships/in";,
"extensions" : {
},
"create_relationship" :
"http://localhost:7474/db/data/node/2/relationships";,
"paged_traverse" :
"http://localhost:7474/db/data/node/2/paged/traverse/{returnType}{?pageSize,leaseTime}";,
"all_relationships" :
"http://localhost:7474/db/data/node/2/relationships/all";,
"incoming_typed_relationships" :
"http://localhost:7474/db/data/node/2/relationships/in/{-list|&|types}"
} ]
B:\>curl -X POST http://localhost:7474/db/data/index/node/ -H "Content-Type:
application/json" -d '{"name":"geom", "config":{"provider":"spatial"}}'
{
"message" : "Unexpected character (''' (code 39)): expected a valid value
(number, String, array, object, 'true', 'false' or 'null')\n at [Source:
java.io.StringReader@78d10502; line: 1, column: 2]",
"exception" : "org.neo4j.server.rest.repr.BadInputException: Unexpected
character (''' (code 39)): expected a valid value (number, String, array,
object, 'true', 'false' or 'null')\n at [Source:
java.io.StringReader@78d10502; line: 1, column: 2]",
"stacktrace" : [
"org.neo4j.server.rest.repr.formats.JsonFormat.readMap(JsonFormat.java:91)",
"org.neo4j.server.rest.web.RestfulGraphDatabase.jsonCreateNodeIndex(RestfulGraphDatabase.java:594)",
"sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)",
"sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)",
"sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)",
"java.lang.reflect.Method.invoke(Method.java:597)",
"com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)",
"com.sun.jersey.server.impl.model.method.dispatch.Abstr
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter,
I could now register the spatial index 'geom' to my database (I was missing
the zip file) - thanks so far.
cypher> start n=node:geom('bbox:[10.0020654, 10.0020654, 48.4126496,
48.4126496]')
cypher> return n
cypher>
==> +---+
==> | n |
==> +---+
==> +---+
==> 0 rows, 24 ms
So zero results for this query. Maybe that node is not indexed by 'geom'?
How can I check to which nodes the spatial index has been applied?
Regards, Daniel
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Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter, How do I add the Spatial plugin? I only have Cypher and Gremlin as server extensions installed. I unzip Neo4j spatial into the plugins folder and then send the JSON via curl to the database. But he can't find any of the needed classes. Which files do I need from the spatial project and where are they copied to the server exactly? Regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3528052.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Hi together,
That would be cool. Atm I am deleting the data folder, that works too for my
testing purpose. I have played around with cypher and encounter some
problems. I have OSM nodes in the database and I 'guess' they have a spatial
index on the geometry (lat, lon). The view on the server administration page
also shows Rtree indices. The indexmanager only shows me some sort of lucene
indices (can I get a more detailed overview of the used indices by query?).
I tried the 'node' index with the following command:
cypher> start n=node:node('bbox:[10.0061535, 10.0061535, 48.4125871,
48.4125871]')
cypher> match (n) -[r] - (x)
cypher> return n
cypher>
==> Error: RuntimeException - org.apache.lucene.queryParser.ParseException:
Cannot parse 'bbox:[10.0061535, 10.0061535, 48.4125871, 48.4125871]':
Encountered " "48.4125871, "" at line 1, column 30.
==> Was expecting:
==> "]" ...
==>
I was expecting to get the node with this coordinates. Can I query bbox for
point geometry at all? I may have typos in the command, so please help me,
these are my first steps with Neo4j :) After playing around with the server
console I will go deeper into the java code.
When I am executing the IndexProviderTest I get an error:
http://dl.dropbox.com/u/18693700/IndexProviderTest.txt
I appreciate your help again,
Daniel
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Re: [Neo4j] Neo4j Spatial build / run problems
Tried Eclipse Java Edition and it seems that everything is working as it should. I could at least start an OSMImport to an embedded database and nodes were copied. I will have a detailed look tomorrow. I still have a few problems with the Neo4j server itself. When I try to batchinsert I get the message that the database was not shutdown in a clean way. I start / stop the server as a service, can I somehow correct this state? How can I delete all the nodes of the database in an easy way? I tried https://github.com/jexp/neo4j-clean-remote-db-addon, but the jar is for version 1.4 and when I execute the rest call no nodes are deleted from the database. Thanks in advance, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3526379.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter, JDK 1.6 does the job! But only for building the project. Netbeans still shows an error for the missing KernelExtension meta-inf, however it does not prevent from running the OSMImporter. Lucene is still not working, maybe it has something to do with that error which is at the SpatialIndexProvider? Should I try it with Eclipse instead (even though I dislike Eclipse^^ / can I provide arguments for individual projects within the IDE?) - which IDE do you use with Neo4j? See you tomorrow :) Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3526111.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter, I have JDK 1.7.0_01 on a Windows 7 64bit machine. After I added the "missing" meta-inf entry org.neo4j.kernel.KernelExtension I could build the project. Now I have a few more problems. I can run the tests for the DynamicLayers and OSMImport without failure but then I am stuck at the OSMImporter itself now. To just get any sort of a result I played around with this class a bit. I set the arguments in the main class by hand (not nice, but I haven't figured out how to pass them in Netbeans project settings when the project is based on Maven). Embedded database and batchinserter works until it wants to use the lucene index. The error message is corresponding to this one: http://neo4j.org/forums/#nabble-td3185975 I guess I have to checkout more than only neo4j spatial and add / fix some of the dependencies. Unfortunately I don't have a Skype setup here :/ Regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3525302.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Hi Peter, I guess the meta-inf entry for the org.neo4j.kernel.KernelExtension is still missing. The repo URL https://github.com/neo4j/spatial.git is correct? It states last commit was 4 days ago... The build ends with error: http://dl.dropbox.com/u/18693700/git21.txt Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3524586.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j Spatial build / run problems
Sure, here are the files, first after the checkout directly and then after I add the missing entry (maybe you can correct this on the repository?). http://dl.dropbox.com/u/18693700/git.txt http://dl.dropbox.com/u/18693700/meta-inf_fixed.txt -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3515786.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Neo4j Spatial build / run problems
Hi I have some problems with the new build of Neo4j Spatial. First if I checkout and try to build the following error occurs "[ERROR] spatial\src\main\java\org\neo4j\gis\spatial\indexprovider\SpatialIndexProvider.java:[38,0] error: Internal error: java.io.FileNotFoundException: META-INF/services/org.neo4j.kernel.KernelExtension". This is the current state after checkout. In the next step I have done the checkout in Netbeans and added the missing META-INF entry. Also there is currently only a "TestKernelExtension" class and not "KernelExtension". After that I could build the project and tried to run the OSMImporter.main inside Netbeans. I can't pass Parameters from project->properties->run->arguments, I guess it has something to do with the Maven project (I am a .NET / VS developer, I do it by trial and error atm). Finally I tried to load the project by console with parameter passing: "mvn exec:java -Dexec.mainClass="org.neo4j.gis.spatial.osm.OSMImporter.main" -Dexec.classpathScope=runtime -Dexec.args=""C:/Program Files/neo4j-community-1.5/data/graph.db" "C:/Users/UserName/Dropbox/WBIS/osm/berlin.osm"". I had to copy the pom.xml (in netbeans project folder) to C:/users/username first to prevent an error from loading this file. After this I am stuck here: [WARNING] [WARNING] Some problems were encountered while building the effective model for org.neo4j:neo4j-spatial:jar:0.7-SNAPSHOT [WARNING] 'reporting.plugins.plugin.version' for org.apache.maven.plugins:maven-surefire-plugin is missing. @ line 532, column 15 [WARNING] [WARNING] It is highly recommended to fix these problems because they threaten the stability of your build. [WARNING] [WARNING] For this reason, future Maven versions might no longer support building such malformed projects. [WARNING] [WARNING] The POM for cuke4duke:cuke4duke-maven-plugin:jar:0.4.4 is missing, no dependency information available [WARNING] Failed to retrieve plugin descriptor for cuke4duke:cuke4duke-maven-plugin:0.4.4: Plugin cuke4duke:cuke4duke-maven-plugin:0.4.4 or one of its dependencies could not be resolved: Failed to read artifact descriptor for cuke4duke:cuke4duke-maven-plugin:jar:0.4.4 [WARNING] The POM for cuke4duke:cuke4duke-maven-plugin:jar:0.4.4 is missing, no dependency information available [WARNING] Failed to retrieve plugin descriptor for cuke4duke:cuke4duke-maven-plugin:0.4.4: Plugin cuke4duke:cuke4duke-maven-plugin:0.4.4 or one of its dependencies could not be resolved: Failed to read artifact descriptor for cuke4duke:cuke4duke-maven-plugin:jar:0.4.4 [WARNING] The POM for org.eclipse.m2e:lifecycle-mapping:jar:1.0.0 is missing, no dependency information available [WARNING] Failed to retrieve plugin descriptor for org.eclipse.m2e:lifecycle-mapping:1.0.0: Plugin org.eclipse.m2e:lifecycle-mapping:1.0.0 or one of i ts dependencies could not be resolved: Failed to read artifact descriptor for org.eclipse.m2e:lifecycle-mapping:jar:1.0.0 Downloading: http://repo1.maven.org/maven2/org/codehaus/mojo/maven-metadata.xml Downloading: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-metadata.xml Downloaded: http://repo1.maven.org/maven2/org/codehaus/mojo/maven-metadata.xml (19 KB at 18.5 KB/sec) Downloaded: http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-metadata.xml (11 KB at 8.0 KB/sec) [INFO] [INFO] BUILD FAILURE [INFO] [INFO] Total time: 2.417s [INFO] Finished at: Thu Nov 17 12:44:42 CET 2011 [INFO] Final Memory: 13M/309M [INFO] [ERROR] No plugin found for prefix 'Files/neo4j-community-1.5/data/graph.db C' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (C:\Users\UserName\.m2\repository), central (http://repo1.maven.org/maven2)] -> [ Help 1] I would appreciate every help. Can I get it to work in Netbeans with parameter passing? -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-Spatial-build-run-problems-tp3515519p3515519.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j in GIS Applications
Hello Peter, that sounds fine. I will probably compare some quad-tree against the existing R-tree implementation. It will take some time until I start with implementing something, but I will keep you informed. Regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-in-GIS-Applications-tp3393925p3437567.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j in GIS Applications
Hello there, first I have written a wall of text, previewed it and then the forum went grey and all of the text has gone - AR! In short: I have read some papers about different spatial indices in the last days. The standard R-tree can be improved in various ways or even replaced by a quad-tree. In one of the upcoming PostgreSQL versions they will probably have a quad-tree based SP-GiST implementation. Early proto-typing shows a speedboost of a factor of 6 in several bounding box queries. In Neo4j there are less spatial operations based on an index compared to a relational database and therefore it should be easier to find an appropriate index (which hopefully will speed up some spatial operations). In the course of my master thesis (which starts next week - wish me luck and success) I could have a look into this. So before everything is gone again - DOOOH - I finish this now... Regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-in-GIS-Applications-tp3393925p3419657.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j low-level data storage
First thanks to all of you for the hints and the detailed explanation of Craig. Peter I was not into any code in detail yet, but I have had a look on the (beta) wiki of Neo4j spatial. Some more questions on the storage format of Neo4j: So the nodes, properties and relationships are stored in seperate files with their own id space. If I load information from the database I will probably have to hit each store. So lets say I have a large database of several gigabytes I will end up with three sequentiell reads (at best) at three different locations on the harddisk. If I store everything in three tables in the relational approach I will come to the same result in terms of data locality - if my assumption is correct. So no way to do a bounding box read from contiguous space when using all of the datastores? The next question goes to the way how OSM ways are stored. I thought the relationships connect the nodes to a way like "is-part-of". Now there are "proxy nodes" which connect the nodes to a way. How does the relationships now come into play? From some presentations I have seen that nodes have lat/lon and name information. Was that only for illustration and that information would normally be stored in the property store or how many information can be stored in a node at all? This would favor the way I can retrieve data then. Lets stay at OSM: How would I store a closed way which isn't connected to anything else? It would have no connection to the rest of the graph. How would that fit from a design perspective? For my master thesis I will have to write comparable importers for Neo4j and PostGIS. Your proposal to lower fragmentation sounds reasonable. I think I can adapt that (or any other approach that comes to my mind) in a branch and also add configuration options to the importer. Regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-low-level-data-storage-tp3336483p3409162.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] Neo4j in GIS Applications
Retrieving data in constant time sounds very promising especially for routing
purposes. Did you allready have thoughts on algorithms that use hierarchies
or contraction of the network? In our students project we implemented some
approaches to reduce search space and have thoughts on the heuristics used
for A*. When travel speed comes into concern we got very different results
with SLD heuristics. Maybe this could be of interest for Neo4j.
When doing bounding box queries the only advantage of Neo4j could be better
spatial locality of data ('nodes' and 'ways' both stored in the same
container). Everything else is up to the r-tree performance as in PostGIS,
which uses an improved r-tree in GIST. Maybe you can do an r-tree search for
the first node near the center of the bounding box and with some magic
retrieve the surrounding nodes with graph traversing... At least I will
think about this, if you can improve bounding box queries over PostGIS.
When I switch to a low zoomlevel I want to use generalization and
simplification of mapdata. In Neo4j I can model that within subgraphs I
guess? For example have different relationships for different zoomlevels (I
skip some nodes of a way for example). I could also build a routing network
within subgraphs where I skip non-junction nodes for example?
Btw what do you think from building a graph inside a relational database? As
I understand now it would be very inefficient because you would have at
least two tables (vertices and edges) and have to do time demanding joins
with the two foreign key colums in the edge table.
Regards, Daniel
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Re: [Neo4j] Neo4j low-level data storage
Hello Chris, thanks for your postings, they are a great starting point for me to assume a good performance of this database. However I have some questions left. Lets say I have a node store and a property store. Both of them are individual files. I am going to implement a GIS application which fetches OSM data from the hard disk. When I load a bounding box I want to avoid to many random reads from the disk. More precisely I want to load nodes and properties inside a given bounding box. It would be great if both the nodes and the properties are organized in successive blocks. Is there one id-pool for both nodes and properties, so that I can load for example the nodes with id 1 and 2 and the properties 3, 4 and 5 with one block read? I can be totally wrong because if I save a new node file with id 1, 2 and then save a new property file with id 3, it will start on a new block (windows block size like 4K). When then writing a new node id it would be saved in the first block I guess. What about fragmentation? And is there an improvement when using a Linux system (inodes? I don't know Linux well)? When I am finished with saving the nodes and properties is there some way of reorganization on the hard disk? Lets say I want to enter a new node which is connected to a low id. Will it get the first free id (and it will be saved on the other end of the harddisk perhaps) or does it just get an allready used id and the following records will be reorganized (insert performance)? Maybe I am totally wrong about this, but I would appreciate an efficient way of storage for GIS data. best regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-low-level-data-storage-tp3336483p3402827.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Neo4j in GIS Applications
Hello everyone, I am going to write my master thesis about the suitability of graph databases in GIS applications (at least I hope so^^). The database has to provide topological queries, network analysis and the ability to store large amount of mapdata for viewing - all based on OSM-data of Germany (< 100M nodes). Most likely I will compare Neo4j to PostGIS. As a starting point I want to know why you would recommend Neo4j to do the job? What are the main advantages of a graph database compared to a (object-)relational database in the GIS environment? The main focus and the goal of this work should be to show a performance improvement over relational databases. In a student project (OSM navigation system) we worked with relational (SQLite) and object-oriented (Perst) databases on netbook hardware and embedded systems. The relational database approach showed us two problems: If you transfer the OSM model directly into tables then you have a lot of joins which slows everything down (and lots of redundancy when using different tables for each zoom level). The other way is to store as much as possible in one big (sparse) table. But this would also have some performance issues I guess and from a design perspective it is not a nice solution. The object-oriented database also suffered from many random reads when loading a bounding box. In addition we could not say how data was stored in detail. The performance indeed increased after caching occured or by the use of SSD hardware. You can also store everything in RAM (money does the job), but for now you have to assume that all of the data has to be read from a slow disk the first time. Can Neo4j be configured to read for example a bounding box of OSM data from disk in an efficient way (data locality)? Maybe you also have some suggestions where I should have a look at in this work and what can be improved in Neo4j to get better results. I also would appreciate related papers. kindly regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-in-GIS-Applications-tp3393925p3393925.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
[Neo4j] Neo4j low-level data storage
Hello everybody, I have some questions regarding data storage in neo4j. How does neo4j store the data on the physical level? Are elements which have a close relationship in the graph stored in an adjacent way on disk? Any special binary format? How do you treat SSDs compared to common harddisks? What are your measures to improve I/O? Is there a technical documention which describes this? regards, Daniel -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-low-level-data-storage-tp3336483p3336483.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
Re: [Neo4j] finding top 10 shortest path
Hello you both could have a look at the so-called "k-shortest-paths problem". There is some related scientific work[1] and implementations[2] for further investigation. regards, Daniel [1] http://www.mat.uc.pt/~eqvm/cientificos/investigacao/r_papers.html#K [2] http://code.google.com/p/k-shortest-paths/ -- View this message in context: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-finding-top-10-shortest-path-tp3235128p3330443.html Sent from the Neo4j Community Discussions mailing list archive at Nabble.com. ___ Neo4j mailing list User@lists.neo4j.org https://lists.neo4j.org/mailman/listinfo/user
