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International Cartographic Conference, Dresden
Spatial Identifier Reference Framework (SIRF)Realising the potential of SDI using spatial identifiers to link multiple information systems.
GOVERNMENT AND COMMERCIAL SERVICES THEME
Rob Atkinson | Paul Box | Laura Kostanski August 2013
Today’s Presentation
• The Vision
• The Problem
• A Spatial Identifier Reference Framework (SIRF)
• Mechanisms
• Status
Vision Versions….
• “Evidence based decision making”
• Discovering and integrating data from multiple sources• because problems are multidimensional• geographic basis of issues and actions • geography is shared
• Spatial Data Infrastructures
• manage spatial data once, and share it
• efficiency and efficacy
• Semantic Web
• machine interpretation
access rights
The Linked Data Vision
Data about the world
application
The Web
Object ID (URL)
context
Magic
Spatial identifiers describe ‘the Somewhere’
Spatial Data Infrastructure (SDI)
• Fundamental component of spatial datasets • Used to reference data
Geospatial information
BPS-ID Name GER ‘08 Tpop’10
003 Nusa Tenggara Barat 111.08 1,318,840
005 Nusa Tenggara Timur 112.09 335,805
Statistical information (Implicitly geospatial)Spatial
identifiers
Bureau of Stats - 003
West Nusa Tenggara
5 |
UNSDI Spatial Identifier Reference Framework | Paul Box
“Distributed” references
Catchment ExtractionRate Storage
1123343 730 300
Internet
How to ask for this entity
How to deliver this entity
Catchment Boundary Area Geometry
1123343 33535.4 151.3344,-35.330…….
One real world feature - multiple representations
Multiple - names, identifiers, geometries, versions
Geospatial information
UNSTATS Name GRP’08 $
IND03 NTB 8,080
IND05 NTT 4,769
BPS-ID Name GER ‘08 Tpop’10
003 Nusa Tenggara Barat 111.08 1,318,840
005 Nusa Tenggara Timur 112.09 335,805
Statistical information (Implicitly geospatial)Spatial
IdentifierReference FrameworkGazetteer ID - 002234
Bureau of Stats - 003
Spatial Data Infrastructure (SDI)
7 |
UNSDI Spatial Identifier Reference Framework | Paul Box
Gazetteer – a special case of Spatial Identifier
GAZETTEERID, placename(s), feature type, location
• Official list of names • Related to mapping process (toponymic)• Used for map lookup
Names are ambiguous
One name – many places
One place - many names• Australia, Australie, أستراليا• Wollongong, ‘the gong’ • Sydney, City of Sydney
Melbourne – locality – Victorian Gazetteer –Official
Melbourne – municipal council boundaries – official
discovery
relevance
access rights
CSIRO. UN Gazetteer - Common Semantic Framework for the UNSDI
Barriers to use of common spatial references
Spatial feature dataset
access mechanism
format
semantics
identifier stability
changecitation
application
Is any platform going to work?
• A single “big bucket” doesn’t work (well enough)• Authority vs. coverage
• Spatial Data Infrastructures are slow to emerge and hard to use• Informal data and Big Data increasingly important• Legacy systems using incompatible identifiers• Specialised systems needing specific views• Semantic Web unproven and unfriendly to existing systems• Linked Data has too much variability
Spatial Identifier Reference Framework
• Respect multiple views, authorities, usages• Better description of existing systems and
resources• Semantic Web and Linked Data for better
discovery• Provenance and authority linked to SDI where
available• Small set of extensions to various standards to
support interoperability of spatial identifiers
http://id.unsdis/id/catchment/567http://id.unsdis/id/catchment/567
URL: spatial data accessURL: spatial data access
URL: observation data archive accessURL: observation data archive access
URL: live data accessURL: live data access
representations Basic properties provenance
URL: virtual data productURL: virtual data product
Identifier Architecture
Sensor Web (image OGC 2006)
Spatial Data Infrastructure
WFS WCS
Spatialdatabases
Services
Linked Data Web
Observation Archive(Data Warehouse)
Transactions
Data Marts Services
Application
Reports
ComputationalModels
Status
• Testing with Australian and Indonesian gazetteers and administrative boundaries, hydrological catchments, Open Street Map data
• Ways to describe resources
• Working services (machine interfaces)
• (Very crude) HTML applications implementation
• Testing federation across multiple nodes
• Documentation and software being prepared for open release
CSIRO. UNSDI Gazetteer for Social Protection in Indonesia
CSIRO. UNSDI Gazetteer for Social Protection in Indonesia
Resource “graph”
CSIRO. UNSDI Gazetteer for Social Protection in Indonesia
