EduServ

GeoSPARQL Tutorial

Wouter Beek (wouter@triply.cc)

Kadaster
Triply B.V.

GeoSPARQL Components

  1. Core
  2. Geometry Extension
  3. Topology Vocabulary Extension
  4. Geometry Topology Extension
  5. RDFS Entailment Extension
  6. Query Rewrite Extension

GeoSPARQL Core

Link to the GeoSPARQL vocabulary: ogc/geo

Geometry Extension (1/2)

Classes

Properties

Datatype IRIs

Geometry Extension (2/2)

Functions

Geometry Extension Applied

A feature can have 2D ánd 3D shapes; it can have; serializations in GML ánd WKT.

Link to a Dutch building: kadaster/bag

Query Geometries

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Query Geometries: Abbreviations

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*
The generic projection includes all visible variables.
[ P O ]
Anonymous node notation (square brackets, […]) can be used to abbreviate unused subject terms.

Find a Dutch Building

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3D Geometries

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?shapeColor
Color of the shape bound to ?shape.
?shapeHeight
Height of the shape bound to ?shape.
?shapeLabel
Label for the shape bound to ?shape.
values (?var … ?var) { (?term … ?term) … (?term … ?term) }
Specify multiple bindings.

Color map (Corona Infections)

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Topology Vocabulary Extension

Properties

Link to a dataset from the Dutch Statistics Office: cbs/wbk

Thanks for Your Attention!

Wouter Beek (wouter@triply.cc)

Kadaster
Triply B.V.