Linked Open Geo Data – A Quick Introduction
Linked Open Geo Data – A Quick Introduction
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lawdi-2013-intro-geospatial-linked-data
On Github sgillies / lawdi-2013-intro-geospatial-linked-data
Linked Open Geo Data
A Quick Introduction
Created by Sean Gillies / @sgillies
Institute for the Study of the Ancient World, New York University
5 ★ Open Data
- 2010 addendum to T. Berners-Lee's Linked Data - Design Issues
- See also: 5 ★ Open Data
5 Stars of Open Geo Data
Downloadable, openly licensed maps (PDFs, PNGs, &c.) Structured feature data (shapefiles, geodatabases) Open formats (KML, GeoJSON, RDF) Features denoted by URIs, so others can use them in their maps Link from features to other things to provide contextNo Stars
★ Downloadable, open
★ ★ Structured features
★ ★ ★ Open formats
★ ★ ★ ★ URIs, URIs, URIs
★ ★ ★ ★ ★ Links
★ ★ ★ ★ ★ More Links
★ ★ ★ ★ ★ Even More Links
★ ★ ★ ★ ★ Links!
Features and relationships
- Ordnance Survey Ontology
- GeoVocab Geometry and Spatial Ontologies
- CIDOC-CRM
- Pleiades
Ordnance Survey
- Contains, Touches, Within
- Very specific to OS data
- Very influential
- http://data.ordnancesurvey.co.uk/ontology
OS Contains
GeoVocab
- Inspired by the OS Ontology
- Classes: spatial:Feature, geom:Geometry
- Properties: spatial:C ("connected with"), &c.
- Supports quantitative and qualitative GIS analysis
- geovocab.org
CIDOC-CRM
- E53 Places are geometries (of previous)
- GIS features are subclasses of E18 Physical Thing
- E47 Spatial Coordinates weakly specified
- E53 Place relationships: P121 Overlaps, P122 Borders With
- Many other relationships involving things, events
CRM Spatial
Pleiades Places
- Equivalent to spatial:Feature and crm:E27_Site
- Precise locations expressed using GeoVocab Geometry Ontology
- Rough locations expressed using OS Spatial Relations
- Networks expressed using GeoVocab Spatial Ontology