the geospatial web matt kenny ridolfi, inc 02/23/2010 e-mail: [email protected]@ridolfi.com web:
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The Geospatial Web
Matt KennyRIDOLFI, Inc02/23/2010
E-mail: [email protected]: http://www.mkgeomatics.com/apps/sal
Outline
• Defined• Google’s Revolution• Web Mapping vs. Web GIS?• A Typical System• ESRI’s Take• An Open-Source Alternative
Defined
• Web mapping is the process of designing, implementing, generating and delivering maps on the World Wide Web. – Encyclopedia of GIS
• XEROX’s PARC Map Viewer– An Early Web Mapping App– Static, Slow, But Innovative
Defined
“Web GIS harnesses the power and reach of the Web and integrates the rich knowledge resources of GIS—authoritative databases, models, and spatial analysis. Web GIS goes far beyond simple visualization and mapping and provides access to full geographic knowledge to everyone. Over time, Web GIS will become an essential part of the infrastructure of society.” – Jack Dangermond, ESRI Founder and President.
Google Maps
• Feburary, 2005– Google Maps launches– Tiled Map Service– Ease-of-use and speed
fundamentally shift our expectations of web mapping applications
Google Maps
• How does it work?– Basemaps are cut into small tiled-images at
eighteen pre-defined scales– Download only the required
tiles to fill the current mapextent
Web Mapping to Web GIS
• Cached map services are great for display, but lack intelligence.
• Augmented with GIS server technology, cached maps provide a cartographic backdrop to Web GIS applications.– Query– Identify– Geoprocessing
Web GIS
• Web GIS applications extend the GIS analyst’s reach
• Empower non-GIS users with access to spatial data– Policy (Managers /
Decision Makers)– Public (Citizens)– Technical (Biologists /
Cultural Resource Surveyors)
Web GIS
• Potential to free the Lone-GIS-Professional from filling redundant map requests– Allows focus to shift from making cartographic
outputs to producing analysis data• After deployment, a GIS analyst can update
application with updated layers– Update map services via ArcDesktop or ArcGIS
Server web management interface
An Open-Source Alternative
• FOSS GIS IS:– Highly Developed– Customizable– Supported– FREE
http://www.osgeo.org/
http://opengeo.org/
An Open-Source Alternative
• OSGeo:– 8/21 Projects Related to
Web Mapping• OpenGeo:– OpenGeo Suite
http://www.osgeo.org/
http://opengeo.org/