geodata conversion & interoperability dr nigel trodd coventry university
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Geodata conversion & interoperability
Dr Nigel TroddCoventry University
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Converting data: R2V – V2R
Most, but not all, GIS can handle raster & vector data
Many GIS functions have been implemented for only one data model
Users of GIS frequently have to rasterise vectors & vectorise rasters
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rasterisation
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Some complications? 1
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Vectorisation: many more complications
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Project based file conversion
Corporate interoperability
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interoperabilityWhat? Why?In a perfect world all data would come in one data format… but the world is not perfect!!Therefore, we adopt standard procedures & protocols to describe dataIf a GIS complies with these standards then it can read the data, …no matter what its’ internal format.
Partial interoperability
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Making interoperability happen: formats & standards, procedures & protocols
de facto industry formats software vendors e.g. ESRI ‘shp’, Google Earth KML
National / international standardse.g. Ordnance Survey NTF
Web-based open standards… HTML, XMLe.g. Open Geospatial Consortium (OGC) specificationsGML, WMS, WFS
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Interoperability in action
Local governmentMultiple stakeholders in the planning processVirtual Planning Environment
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DEM,weather
data
Naturalenvironment
Legacy data
Simulationdata e.gacoustic
properties
3D IFCschema
Legacy applications
Visualisations & interactions
OO databasesRelational databases
Builtenvironment
Topographic,Infrastructure
data
Health,crime dataHuman
environment
Multispectralimages
Other files
Files
Simulation & prediction models
e.g. GIS viewer …
Research applicatio
ns
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Legacy data
Sta
nd
ard
Layers
INTELCITIES applications
Legacy applications
VR / AR visualisations & interactions
OO databasesRelational databases
Files
Simulation & prediction models
Naturalenvironment
Builtenvironment
Humanenvironment
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summary & conclusion
• The future is bright, the future is
InteroperableGIS