MingHsiang Tsou Email: mtsoumail.sdsu.edu phone: [phone] Fax: [phone]

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Ming-Hsiang TsouEmail mtsou_at_mail.sdsu.eduphone
619-5940205Fax [phone]
CA-OES CAL(IT)2 Feb. 20, 2002

• Internet GIServices

From Centralized Systems to Distributed Services
Department of Geography, San Diego State
University
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Why Internet GIServices?
Flexible Information Access / Exchange (End-Users
only need a Web browser) Information Sharing
and Integration (Access multiple Internet Map
Servers at the same time Local governments,
USGS, EPA, Census, etc.) Real-time Information
Update and Distribution Gather data from client
sides (polices, firefighters), Distribute
updated data from server sides (control centers)
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Internet Map Server

• Three-Tie Architecture
• http//map.sdsu.edu

Client (Web browser) Java applets
Internet Map Server ArcIMS
Web Server map.sdsu.edu
Internet
Client (Web browser) IMS Viewer
Client (Web browser)
Regional Database (GIS)
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Three Types of Internet GIServices

• Data Warehouse (Catalog Metadata)
• Interactive Internet Mapping Facilities
  (Internet Map Servers)
• Real-time Analytical Tools for GIS modeling and
  analysis applications. (wide fire spreading
  model, flooding area prediction,)

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Key Technologies

• Internet Map Server (ESRIs ArcIMS, AutoDesks
  MapGuide, INTEGRAPHs GeoMedia Web Map,
  SmallWorlds Internet Application Servers, etc.)
• Java Programming (cross-platform Java applets
  and Java Servlets)
• XML (Extensible Markup Language) for metadata and
  communication with Internet Map Servers (ArcIMS
  ArcXML).

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ESRI ArcIMS http//maps.esri.com/
AutoDesk MapGuide http//usa.autodesk.com/adsk/i
ndex/0,,939407-123112,00.html
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GeoMedia Web Map http//www.intergraph.com/gis/cus
tomers/default.asp
Internet Mapping Software Comparisons http//map.
sdsu.edu/software-demo.htm
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Problems for Internet GIS packages

• Heterogeneous Geospatial Data Formats
• ArcIMS Shapefiles and Images
• MapGuide Spatial Data Files (SDFs)
• GeoMedia Web Map ActiveCGM
• Security and Upgradeability
• Access control, password protection, Intranet
  solution
• Upgrade from 100 clients to 1000 clients.
• Customizable Interfaces and functions
• require advanced programming efforts.
• lack of on-line GIS operations and modeling
  functions.

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NASA ARC project Web-based GIS and Analytical
Tools

• Http//map.sdsu.edu/arc
• Required Web Browser Java applets capability (IE
  5.0 or Netscape 4.0 later)
• Suggested Screen Resolution 1024x768

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Project Demonstration http//map.sdsu.edu/arc
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GPS / Remote Sensing Images Data Integration

• GPS data collected by MTRP Park Rangers with
  their Trimble GPS units and Pathfinder Office
  software.
• Research teams converted the GPS data sets to
  Shapefiles and integrate them with our ArcIMS
  server.

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MTRP BMX (motor-crossing bicycling) GPS Data in
ArcIMS
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Image Overlay Function(Change Detection)
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• Image Processing
• Image Filtering
• Image Viewing

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Current Internet GIS Capabilities

• What can we do now?
• On-line display (spatial features)
• On-line query (attributes)
• Very limited GIS functions. (Identifying,
  selections, buffering? ).
• On-line editing new graphs/data and send back to
  servers.
• What can we not do now?
• Full GIS operations (overlay, network analysis,
  3D)
• Upload a GIS Model or procedures to server side.
• Integration of different vendors packages
  (ArcIMS, MapGuide, GeoMedia Web Map).

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Future Development

• Smart Mapping Software
• Intelligent Software Agents,
• (searching requested GIS data automatically)
• Mobile devices
• GPS / Cellular Phone/ PDA Integration
• Real-time GIS functions and Modeling
• Hydrology modeling (flood control ALERT
  systems), Wide fire modeling, Earth Quake
  simulations, etc.

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GPS Integration and Mobile GIServices