[Neo4j] Neo4j Spatial question

Axel Morgner axel at morgner.de
Wed Oct 27 23:36:34 CEST 2010


All I found is this, but didn't tested any of them:

http://jira.codehaus.org/browse/GEOT-1924
http://www.mapfish.org/svn/mapfish/contribs/java-geojson/trunk/src/main/java/org/mapfish/geo/



Am 27.10.2010 23:29, schrieb Peter Neubauer:
> Alex,
> I can't find any good code example to parse the GeoJSON with GeoTools,
> asking on the lists. After that, it should be much the same as the
> ShapefileImporter,
> http://github.com/neo4j/neo4j-spatial/blob/master/src/main/java/org/neo4j/gis/spatial/ShapefileImporter.java
> . Just need some advice.
>
> Craig, Davide - any skillz with that?
>
> Cheers,
>
> /peter neubauer
>
> VP Product Management, Neo Technology
>
> GTalk:      neubauer.peter
> Skype       peter.neubauer
> Phone       +46 704 106975
> LinkedIn   http://www.linkedin.com/in/neubauer
> Twitter      http://twitter.com/peterneubauer
>
> http://www.neo4j.org               - Your high performance graph database.
> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
>
>
>
> On Wed, Oct 27, 2010 at 9:39 PM, Axel Morgner<axel at morgner.de>  wrote:
>> Sure, I attached an archive with some countries.
>>
>> But ..attachments are filtered by the list, aren't they?
>>
>> Am 27.10.2010 21:27, schrieb Peter Neubauer:
>>> Axel,
>>> do you have a small sample of that data? It might be very useful to
>>> write a small GeoJSON importer and corresponding test for importing
>>> stuff into Neo4j Spatial, much like the Shapefile importer. I am
>>> thinking of using something like
>>>
>>> https://svn.osgeo.org/geotools/trunk/modules/unsupported/geojson/src/test/java/org/geotools/geojson/GeometryJSONTest.java
>>> if you have some sample data?
>>>
>>> Cheers,
>>>
>>> /peter neubauer
>>>
>>> VP Product Management, Neo Technology
>>>
>>> GTalk:      neubauer.peter
>>> Skype       peter.neubauer
>>> Phone       +46 704 106975
>>> LinkedIn   http://www.linkedin.com/in/neubauer
>>> Twitter      http://twitter.com/peterneubauer
>>>
>>> http://www.neo4j.org               - Your high performance graph database.
>>> http://www.thoughtmade.com - Scandinavia's coolest Bring-a-Thing party.
>>>
>>>
>>>
>>> On Wed, Oct 27, 2010 at 8:59 PM, Axel Morgner<axel at morgner.de>    wrote:
>>>> Hi,
>>>>
>>>> a part of my current project is about rendering an abstract world map
>>>> (countries filled with a color gradient). I'm using Polypmaps on a 10 MB
>>>> geoJSON file with high-res vector data, containing 246 features defining
>>>> all the world's countries as multi-polygons (about 1.5 million points
>>>> overall). Now even when the map is zoomed in, the hole file is processed
>>>> instead of a small set of countries. Polymaps renders SVG path elements
>>>> for each request, and rendering the whole map is by far too slow (4-5 s
>>>> even on a fast machine).
>>>>
>>>> My idea is to store all features in Neo4j and determine only a subset of
>>>> individual countries to process for a given map section
>>>> programmatically. There's already a neo4j instance containing all CMS
>>>> data, so this approach seems natural to me.
>>>>
>>>> With Polymaps I can easily get the coordinates (lat,lon) of the box
>>>> corners. Now I only have to get all points within that box and get their
>>>> corresponding country to be loaded and rendered.
>>>>
>>>> Can Neo4j spatial support me here? F.e. is there a geoJSON importer? And
>>>> I saw different search classes in org.neo4j.gis.spatial.query, could
>>>> that help? Or is there a better approach at all?
>>>>
>>>> Thank you in advance
>>>>
>>>> Axel
>>>>
>>>>
>>>>
>>>>
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>>
>> --
>> Axel Morgner
>> Creative Solutions - Software Engineering
>> GUI&    UX Design - Project Management
>>
>> c/o inxire GmbH
>> Hanauer Landstr. 293a
>> 60314 Frankfurt
>> Germany
>>
>> Phone +49 151 40522060
>> E-mail axel at morgner.de
>> Web http://www.morgner.de
>>
>>
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-- 
Axel Morgner
Creative Solutions - Software Engineering
GUI&  UX Design - Project Management

c/o inxire GmbH
Hanauer Landstr. 293a
60314 Frankfurt
Germany

Phone +49 151 40522060
E-mail axel at morgner.de
Web http://www.morgner.de



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