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Integration of a Spatial Data Infrastructure into an e-learning

environment

GI-Tage, Münster

06-27-2002

Ingo Simonis

Stephan Merten

Institute for Geoinformatics

University of Münster, Germany

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geoinformation.net

• BMBF (FMER) funded project• 2 ½ years• Ends 12/2003• Partners

• University Bonn • University Karlsruhe• University Munich (2x)• University Potsdam

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www.geoinformation.net

• Goal: Development of a e-learning environment• e-learning modules (all)• geo-algorithms editor (Bonn)• SDI-portal (Münster)

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Driving forces

• Encourage “active learning”

• Data availability for lectures

• Different formats, different CS

Spatial Data Infrastructure

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Mapping Services

Raster-data

Oracle

WCS

WMS

ArcSDE

WMS

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Feature Services

Oracle

WFS

ArcSDE

Geographic Markup Language (GML 2.1)

GML

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Catalog Services

Oracle

Catalog/WRS

ArcSDE

• Metadata for services and data

• FGDC/ISO• service chaining• service plug-and-play

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Open GIS Consortium

• International consortium of well-known GIS-, OS-, DBMS –providers, developers, and users (ESRI, SICAD, SUN, MS, Oracle, Informix, etc.)

• non profit, founded in 1994

• Close cooperation with ISO

• worldwide leadership at description of interoperable GIS• Availability of spatial data through SDI• Approach: Interoperability of services based on interface

specifications

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Architecture Part 1

(Spatial)-DB

RegistryWMS

WFS WCS

http

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GI-Software at German Universities

• expertise on COTS rather than SCOTS• based on ESRI educational programs

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Architecture Part 2

(Spatial)-DB

ArcSDE

ArcIMS

ArcPad

ArcGIS

ArcExplorer

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GI-Software at German Universities

• expertise on COTS rather than SCOTS• based on ESRI educational programs• two phase development

• COTS working environment• SCOTS gaining experiences

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Architecture Part 3

(Spatial)-DB

ArcSDE

ArcIMS

RegistryWMS

WFS

ArcPad

WCS ArcGIS

http

ArcExplorer

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Academic vs. commercial SDI

• case study• search for suitable data:

• meta data: • SCOTS: ISO 19115 (core)• COTS: FGDC / ISO• minimal capacities to pay attention on• automatic mapping required • leads to a simplified and adapted meta data

subset (based on ISO 19115)

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Academic vs. commercial SDI

• Catalog responses and needs in class• Response: URI of a shape file• Exploring capacities• No standardized way to feed a shape file to a WMS

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Academic vs. commercial SDI

• data access• WFS: usability of GML encoded data• Visualization aspects• how to visualize arbitrary data?• WMS -SLD a first solution• Map manipulation?• SMS = discussion paper• follow every spec?

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Academic vs. commercial SDI

• data processing• COTS: lots of processing functionality • SCOTS?• web based GIS?

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Summary I

• Turnover rates at universities• ArcIMS: 300+ pages manual• Continuity necessary• Financial aspects• Commercial model conceivable:

• Self-financing by participating universities• Integration of new technologies

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Summary II

• Standardized infrastructures do not fulfill the daily needs entirely

• COTS products still needed• New services allow integration of simulation models into SDIs

• SDI main role: Data acquisition• Things will change when more processing capacity will be available as services

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Thank you!