[Bigdata-developers] Geonames and Blazegraph Geospatial index

[Jem R. <jem...@ft...>]

Hello,

I would like to index geonames lat/long using Blazegraphs geospatial index.

Geonames lat/longs are provided in the following flavour of RDF:

<http://sws.geonames.org/4667981/> <
http://www.w3.org/2003/01/geo/wgs84_pos#lat> "35.79787" .
<http://sws.geonames.org/4667981/> <
http://www.w3.org/2003/01/geo/wgs84_pos#long> "-83.44683" .

I was wondering if anyone has already worked on Custom Geospatial Data
types, vocabularies etc for Geonames in Blazegraph ?


It appears that one would need flatten the objects into a single
multidimensional literal for indexing?

<http://sws.geonames.org/4667981/> somenamespace:latlong
"35.79787#-83.44683"

With the configuration and definition of a new literal type?

I am wondering if its possible to index on multiple known predicates rather
than multidimensional literals with extended data types?


Cheers
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*Jem Rayfield*
Head of Solution Architecture
Technology

+44 (0)7709 332482
Number One Southwark Bridge, London SE1 9HL


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