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

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 context

No 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

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

Feature Connections

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 context

Links

geonames.org (Unxos GmbH): 8M features openstreetmap.org (OSM Foundation): 500K contributors linkedgeodata.org (University of Leipzig): 1B nodes, 100M ways geovocab.org
https://github.com/sgillies/lawdi-2013-intro-geospatial-linked-data

THE END