Query Geospatial Data using SPARQL Query Language
I will soon put my full attention to writing a very simple introduction to SPARQL that will make these demos much easier to understand. For now though, this is fundamentally about demonstrating a query solution production workflow that involves —
- Query Parsing
- Cost Analysis & Solution Plan Building that includes Image-Processing
- Data Visualization using an HTML5 & Javascript page
Screenshots
PivotViewer Page Links
[1] Polygon and multiple points on a map
[2] Multiple Polygons and multiple points on a map
[3] Lines and multiple points on a map
SPARQL Query Source Code Links
[1] Polygon and multiple points on a map
[2] Multiple Polygons and multiple points on a map
[3] Lines and multiple points on a map
Tools Used
[1] OpenLink Virtuoso — High-Performance, Scalable, and Secure Multi-Model RDBMS that supports SPARQL & SQL Query Languages
[2] Linked Open Data Cloud Cache — URIBurner Service (Live Virtuoso Instance)