In this blog post, the author discusses the relative lack of spatial indexes for data in RDF triple stores, compared to data stored in GIS systems and a number of spatially enabled relational databases. He shares an example using the Ordnance Survey Data's API to obtain a location's URI, which is then used to construct a series of SPARQL queries based on several spatial relationships related to that location.
URL: https://johngoodwin225.wordpress.com/2013/08/02/ordnance-survey-linked-data-a-simple-spatial-query/
Keywords: Linked Open Data (LOD), Government Open Data, SPARQL
Author: Goodwin, John
Date created: 2013-08-02 04:00:00.000
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P15M
Educational use: professionalDevelopment
Educational audience: student
Interactivity type: expositive
- [MOVE] Knows portals and registries for finding RDF-based vocabularies.
- RDF vocabularies and application profiles
- Finding RDF-based vocabularies
- [MOVE] Knows portals and registries for finding RDF-based vocabularies.
- Finds properties and classes in the Linked Open Vocabularies (LOV) observatory and explores their versions and dependencies.
- [MOVE] Knows portals and registries for finding RDF-based vocabularies.
- Finding RDF-based vocabularies
- RDF vocabularies and application profiles
- Reads and understands high-level descriptions of the classes and properties of a dataset in order to write queries.
- Interacting with RDF data
- Querying RDF data
- Reads and understands high-level descriptions of the classes and properties of a dataset in order to write queries.
- Reads and understands high-level descriptions of the classes and properties of a dataset in order to write queries.
- Querying RDF data
- Interacting with RDF data
- Uses available tools, servers, and endpoints to issue queries against a dataset.
- Interacting with RDF data
- Querying RDF data
- Uses available tools, servers, and endpoints to issue queries against a dataset.
- Execute SPARQL queries using the Jena ARQ command-line utility.
- Queries multiple local data files using ARQ.
- Uses ARQ to evaluate queries on local data.
- Uses Fuseki server to evaluate queries on a dataset.
- Queries multiple data files using Fuseki.
- Accesses DBPedia's SNORQL/SPARQL endpoint and issues simple queries.
- Uses available tools, servers, and endpoints to issue queries against a dataset.
- Querying RDF data
- Interacting with RDF data