Transcript Document

1G, Interoperability, and
GeoSciML
Boyan Brodaric, Geological Survey of Canada, Ottawa
Interoperability Work Group, IUGS-CGI
Brodaric, 14-03-2007
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Acknowledgements
 IUSG-CGI Interoperability Work Group
Canada: Eric Boisvert, Boyan Brodaric (GSC)
UK: Tim Duffy, John Laxton, Marcus Sen (BGS)
US: Bruce Johnson (USGS), Steve Richard (Arizona)
France: Jean-Jacques Serrano, Dominique Janjou, Christian Bellier, Francois Robida (BRGM)
Sweden: Lars Stolen, Jonas Holmberg, Thomas Lindberg (SGU)
Australia: Simon Cox (CSIRO), Bruce Simons, Alistair Ritchie (GeoScience Victoria),
Ollie Raymond, Lesley Wyborn, Dale Percival (Geoscience Australia)
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Outline
 Web mapping approaches
 Levels of data interoperability
 Demo
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Two Approaches to Web Geology Maps
 Atlas (Geologic Cartographic System):
mosaic of geologic map images
 GIS (Geologic Information System):
collection of geologic map data
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Option 1: web ATLAS
 purpose: communication
 content: picture, text, URL
 function: view only
 standard: data systems
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Option 2: web GIS
 purpose: science, policy
 content: map data
 function: view,
optional
query,
symbolize,
download
 standard: data systems,
data structure,
optional
data content
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Levels of Map Data Interoperability
Atlas
GIS
Map System 1
Map System 2
Integrated Map
scientific
Scientific Interpretation (Geologist)
scientific
semantic
Data Content (Ontology)
semantic
schematic
Data Structure (GeoSciML)
schematic
syntax
systems
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Data Language (GML)
syntax
Data Services (WMS, WFS, WCS)
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systems
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Systems Interoperability
 aligning data system interfaces (web services)
 but: heterogeneous structure, content, interpretation
STANDARD DATA INTERFACES
• to different data systems
• e.g. open geospatial web services (OGC)
from www.GEONgrid.org
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Schematic Interoperability
 aligning heterogeneous data structures
 but: heterogeneous data content, interpretation
GEOLOGIC AGE
ROCK TYPE
STANDARD SCHEMA
• for data transfer
from www.GEONgrid.org
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Semantic Interoperability
 aligning heterogeneous definitions for data content
 but: heterogeneous interpretation at map borders
Era
GEOLOGIC AGE
Eon
ROCK TYPE
Volcanic
Period
STANDARD DEFINITIONS
• data content: rock types, time scale, …
• data schema, metadata
Series
from www.GEONgrid.org
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Scientific Interoperability
 aligning heterogeneous scientific interpretations
 but: done by geologists, not computers (… for now?)
Differences in:
• geometry
• geohistory
• description
• classification
from www.GEONgrid.org
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Example of Schematic Interoperability
 GeoSciML Testbed 2
IUGS-CGI Interoperability Work Group (IWG)
- Use open standards for system & syntax (WxS,GML)
- Develop standard schema for data exchange (GeoSciML)
- Demonstrate the need for semantic standards
- Three use-cases: view & query, download, symbolize
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Example of Schematic Interoperability
 GeoSciML Testbed 2
Canada
USA
GSC schema
WMS
WFS
USGS schema
WMS
WFS
BRGM schema
WMS
WFS
France
• multiple viewers
• custom tools
• standard interface
• custom translator
• one output data format
GML
Client
BGS schema
WMS
WFS
SGU schema
WMS
WFS
GA schema
WMS
WFS
UK
Sweden
Australia
• many databases
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• local data control
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Use-case 1: view map & query one object
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Use-case 2: select objects and download
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Use-case 3: symbolize by rock type, age
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Some questions for 1G:
 Atlas or GIS or hybrid?
 Level of interoperability?
 Leverage GeoSciML Testbed 2?
GeoSciML Testbed 2 demonstration on Friday!
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END
Demo
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