Questions tagged [geosparql]
GeoSPARQL - A Geographic Query Language for RDF Data
9 questions
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How to represent that region is disjoint (the exact inverse) from another using GeoSPARQL
TDLR: Can I represent concepts like disjoint directly using GeoSPARQL?
I want to represent (in RDF using my own ontology along with GeoSPARQL) that I have an entity inside some area which is ...
- 111
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20
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Can I use GeoSPARQL without importing the ontology
I am building my ontology and i defined the data property :hasGeometry in my ontology and mapped it to geom column in the database. I didn't import the GeoSPARQL ontology. Can I in this case use ...
- 21
1
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39
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How to write GeoSPARQL query when hexadecimal representation of a binary encoded geometry
I am trying to write a GeoSPARQL using the geometry column of a layer imported from QGIS to PostGIS. The format of the geometry column is hexadecimal representation of a binary. When I try to use geo:...
- 21
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126
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ST_intersects with 500GB of data taking days to run in scala
I have a requirement of getting a bounding box filtered into exact country polygon boundary. For this I am using Sedona ST_intersects query. But this query when I run for 2 GB of data takes 15 mins ...
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1
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380
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Intersection of geometries as GeoSPARQL result
I'm querying two geosparql conform datasets at endpoint http://onto.fel.cvut.cz:7200/sparql trying to get intersectred geometry as result using GeoSPARQL language.
PREFIX rdf: <http://www.w3.org/...
- 153
3
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1
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318
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Loading Geospatial RDF in Virtuoso?
I want to know what kind of format (syntax) a geospatial rdf should have so I can load it into virtuoso (open source) and do a GeoSPARQL query over it. I found a very small and simple geospatial rdf ...
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2
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286
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bif:st_within set the correct tolerance
I am querying a Virtuoso store with SPARQL, and I want to retrieve some layer that are near a wkt geometry with a tolerance of 10 kilometers.
How I have to set the tolerance parameter? In which unit ...
- 143
2
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2
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381
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Representing coordinates on non-earth globes in semantic data
There are standards to represent geospatial data in the context of linked data, such as GeoSPARQL. However, I could not find a way to represent the coordinates that are not on Earth - such as, for ...
- 121
4
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504
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RDF representation of 3D-geodata?
When it comes to 2D-data it seems there are a couple standards out there to represent it in a semantic way (GeoSPARQL, NeoGeo, ...). However I couldn't really find one to do that for 3D-data. I have ...
- 381