Since Blazegraph 2.0 provides implementation for geospatial indexing, we want to have support for geospatial operations in WDQS.
Minimal requirement for supported operations:
So queries won't have to be written like this any more ? :-)
Wikidata:SPARQL_query_service/queries#Working with co ordinates
In Blazegraph 2.0 the geospatial search looks like:
SELECT ?res WHERE {
SERVICE geo:search {
?res geo:search "inRectangle" .
?res geo:predicate example:locatedIn .
?res geo:spatialRectangleUpperLeft "0.00001#0.00002" .
?res geo:spatialRectangleLowerRight "0.00003#0.00003" .
}
}or:
SELECT ?res WHERE {
SERVICE geo:search {
?res geo:search "inCircle" .
?res geo:predicate example:locatedIn .
?res geo:spatialCircleCenter "0.00002#0.00002" .
?res geo:spatialCircleRadius "0.1" .
}
}So I think we can have something similar. I imagine indexing will also be better since now the query examples probably do not use indexes at all.