Interoperability Work Group Brodaric, 14-03-2007 1 1G, Interoperability, and GeoSciML Boyan Brodaric, Geological Survey of Canada, Ottawa Interoperability

1 Interoperability Work Group

Brodaric, 14-03-2007

1G, Interoperability, and

GeoSciMLBoyan Brodaric, Geological Survey of Canada, Ottawa

Interoperability Work Group, IUGS-CGI



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)



Outline Web mapping approaches

Levels of data interoperability

Demo



Two Approaches to Web Geology Maps Atlas (Geologic Cartographic System):

mosaic of geologic map images

GIS (Geologic Information System):

collection of geologic map data



Option 1: web ATLAS purpose: communication content: picture, text, URL function: view only standard: data systems



optional

optional

Option 2: web GIS purpose: science, policy content: map data function: view,

query,

symbolize,

download standard: data systems,

data structure,

data content



Levels of Map Data Interoperability

systems

syntax

schematic

semantic

Map System 1

scientific

systems

syntax

schematic

semantic

Map System 2

scientific

Integrated Map

Scientific Interpretation (Geologist)

Data Content (Ontology)

Data Structure (GeoSciML)

Data Language (GML)

Data Services (WMS, WFS, WCS)Atl

asG

IS



from www.GEONgrid.org

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)



GEOLOGIC AGE ROCK TYPE

but: heterogeneous data content, interpretation


Schematic Interoperability aligning heterogeneous data structures

STANDARD SCHEMA• for data transfer



GEOLOGIC AGE ROCK TYPE

Volcanic


Semantic Interoperability aligning heterogeneous definitions for data content

Era

Eon

Period

Series

STANDARD DEFINITIONS• data content: rock types, time scale, …• data schema, metadata

but: heterogeneous interpretation at map borders




Scientific Interoperability aligning heterogeneous scientific interpretations but: done by geologists, not computers (… for now?)

Differences in:• geometry• geohistory• description• classification



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



GML

Client

USGS schema

BRGM schema

GSC schema

BGS schema

SGU schema

GA schema

GeoSciML

GeoSciML

GeoSciML

GeoSciML

GeoSciML

GeoSciML

Australia

Sweden

UK

France

USA

CanadaWMS WFS

WMSWFS

WMSWFS

WMSWFS

WMSWFS

WMSWFS

Example of Schematic Interoperability GeoSciML Testbed 2 • multiple viewers

• custom tools

• many databases (ESRI, Oracle,shp, …)• local data control

• standard interface• custom translator• one output data format



Use-case 1: view map & query one object



Use-case 2: select objects and download



Use-case 3: symbolize by rock type, age



Some questions for 1G: Atlas or GIS or hybrid?

Level of interoperability?

Leverage GeoSciML Testbed 2?

GeoSciML Testbed 2 demonstration on Friday!



END

Demo

Documents

Interoperability Work Group Brodaric, 14-03-2007 1 1G, Interoperability, and GeoSciML Boyan Brodaric, Geological Survey of Canada, Ottawa Interoperability