How to Query Cadastral Big Data Using GeoSPARQL?
Wouter Beek (w.g.j.beek@vu.nl, wouter@triply.cc)
The Open Data Vision
Use (Geo)SPARQL endpoints i.o. copying data locally.
Properties of Cadastral Big Data
- Over 1,000,000,000 graph edges
- Over 100,000,000 geo shapes
- Precision
- Performance
Implementations of GeoSPARQL
GeoSPARQL: Executive summary
- Only few implementations to choose from.
- FOSS implementations do not perform.
- Commercial vendors cannot deliver an open endpoint.
- Commercial solutions do not work out-of-the-box.
“Nobody has complained about this before”
Questions to you
- Should we drop the vision? (i.e., no open endpoints)
- Is GeoSPARQL too demanding for the web?
- Is there no market? (Open Government)
- Can we --- commerce, FOSS, OGC, academia --- work something out here?