current and potential uses for gis in academic arctic research michael f. goodchild university of...
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Current and Potential Uses for GIS in Academic Arctic Research
Current and Potential Uses for GIS in Academic Arctic Research
Michael F. Goodchild
University of California
Santa Barbara
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Workshop objectivesWorkshop objectives
To promote the creation and flow of georeferenced data and related discoveries
Consistent with current thinking about GIS– technology for communicating what we know
about the planet’s surface in digital form– extending what we know
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OutlineOutline
GIS– functionality and representation
Geolibraries– storing and disseminating
The Arctic context The user perspective
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GIS basicsGIS basics
Geographic information– associates points on the Earth’s surface with
properties (and times)– the atomic fact <x,t,z>– maps, Earth images– a container of maps and Earth images in
digital form– organized in layers
or in classes of objects
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GIS functionalityGIS functionality
Basic housekeeping and file management
Visualization Query Measurement Transformation Analysis and hypothesis testing
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Modeling using GISModeling using GIS
Add-ons, coupling Finite difference, finite element models
– hydrology, tides, ecology, climate Cellular automata
Diffusion model
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Representation optionsRepresentation options
Raster Vector Discrete objects
– points, lines, areas, volumes, and their attributes
Fields– functions of location f(x,y,z,t)
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Value of a GIS approachValue of a GIS approach
Visualization– easy access, query– geographic context
Integration– between layers, between disciplines
Spatial analysis– interpretation of patterns, residuals, outliers
Spatially explicit modeling
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Sharing and communicating dataSharing and communicating data
Geographic location as a search key The geolibrary
– a library whose primary search mechanism is geographic
– what have you got about there– impossible to build a physical one
Any information object with a footprint
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NRC reportNRC report
"Distributed Geolibraries: Spatial Information Resources”, 1999
www.nap.edu
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Organizing information by locationOrganizing information by location
Information with a geographic footprint Organizational metaphors
– the desktop, office, workbench– the surface of the Earth
Metadata– the description needed to support search– FGDC Content Standard for Digital
Geospatial Metadata
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CLM of the Alexandria Digital Library
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Knowing where to lookKnowing where to look
Approaches to CLM– by data type
ortho.mit.edu
– by area of the globe Arctic Data Directory
– the one stop shop www.fgdc.gov
– a new generation of search engines identifying footprints
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The Arctic contextThe Arctic context
Symmetry with Antarctica?– NSF/USGS Antarctic GIS Workshop 1995– SOLA Planning Workshop 1997– importance of base mapping, data
integration
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Hongxing Liu’s Antarctic DEM
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Is there symmetry?Is there symmetry?
Many national rights to data Land vs ocean
– lack of fixed features, moving surface– fixed ocean floor
Wright and Bartlett, Marine and Coastal Geographic Information Systems (Taylor and Francis, 2000)
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A user perspectiveA user perspective
Build or buy– skill levels vary among academic researchers– from Unix hackers to the computer-
challenged GIS is COTS
– the open GIS software community is small (e.g. GRASS)
– industry is shifting to reusable software components
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The Unix hackerThe Unix hacker
Uses discipline-specific and science-specific standards– DODS, HDF, CDF
Will use geolibrary tools Will use GIS when there is a need for:
– integration across disciplines– collaboration outside the discipline– interaction with policy-makers
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The computer-challengedThe computer-challenged
Will use geolibrary tools Will use GIS as the preferred solution
for display of data, analysis, modeling
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Impediments to data sharingImpediments to data sharing
Horizontal vs vertical integration IP issues
– the private sector– international variation in practices
The CLM problem The interoperability problem
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Concluding commentsConcluding comments
Is the Arctic special?– if not, build on experience from other
spatial data infrastructure efforts A user perspective
– the scientist needs to see that GIS adds sufficient value to offset the perceived diversion of resources
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GISGIS
Comprehensive technology for working with geographic data
Integrating data through common geographic location
Seeing data in easily comprehended form
Seeing data in context
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GIS as infrastructureGIS as infrastructure
The Hubble telescope, the South Pole station
Mechanisms for storing and sharing data– computational models
Tools, training, experience To promote a science that is more
integrated, leads to new insights, more readily linked to policy