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OGC Standards & OGC Standards & New Web Map ServicesNew Web Map Services
Which to Use When?Which to Use When?EamonEamon WalshWalshCTO,CTO, eSpatialeSpatial
January 2007January 2007
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AgendaAgenda
1. New Web Map Services• Google, Yahoo, Microsoft…
2. Relationship to OGC
3. When to Use Which• With Examples
Conclusions, Questions…
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Web Map Sites Web Map Sites Google, Yahoo, Microsoft…Google, Yahoo, Microsoft…
Yahoo MapsYahoo Maps
MS Virtual Earth(MapPoint)
MS Virtual Earth(MapPoint)
Google MapsGoogle Maps
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MashMash--ups & Web Map Servicesups & Web Map ServicesGoogle / Yahoo / MS APIsGoogle / Yahoo / MS APIs
JavaScript APIs for Web PageCall Web Service from VendorGoogle Most PopularYahoo, Microsoft also availableFree for Free Use
Commercial offerings…
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Google EarthGoogle Earth
Excellent User Interface!• Fly Through…
Fetches Imagery and other Data from Google
Can add data…
Free Basic Version + Charged Commercial versions
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Google Earth #2Google Earth #2KML & Web ServicesKML & Web Services
KML is a file format read by Google Earth• Published• But defined by Google
“KMZ” is compressed KMLCan exchange as FileCan serve Dynamically to Google EarthGoogle Earth is NOT only Viewer – ESRI, NASA, …• But these also support
OGC standards…
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OGC &OGC & GoogleGoogle……
• Google Maps Service similar to OGC WMS
• & similar Web API available
• KML similar to OGC GML
• Exact copy in parts
• But simpler…
• KML services similar to OGC WFS
• Google Now a member of OGC
• Due to submit KML as standard…
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“Why Not Always Use Google “Why Not Always Use Google ––Its Free”Its Free”
Its Not Necessarily Free.
Its great for its purpose but not necessarily yours:• Its Branded…• Its limited - Functions,
Data…
Example…
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Web API to WMS Web API to WMS –– Open LayersOpen Layers
Integrate into any web application
But Need a WMS service with the data…
http://www.openlayers.org/
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New Services are Good Because… New Services are Good Because…
“Cool” Excellent User Interfaces! Have Data• BUT not always up-to-date• Or all the data you need
Easy to Integrate• “One Stop Shop” but also “One size fits all”
Free• But only in Free, Public, non-commercial sites –
With Branding & advertising from Map Provider
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OGC is Good Because… OGC is Good Because…
Standards agreed by GIS community…Being mandated for Government, INSPIRECan use your data• + Standards to Add and Edit Data• + Many Data Services
Supported by wide choice of Vendors• Including Open Source
Easy to IntegrateCustomise your application -• & No Branding nor advertising from vendor
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ConclusionsConclusions
Use Public Map Services to:• Create simple public free sites where branding
not an issue and maps can be “good enough”• Provide visualisation in Google Earth
Use OGC standards & supporting technologies to:• Provide richer functionality• Provide restricted or charged applications• Build or integrate custom applications• Integrate proprietary data – yours or partners
Format: KML becoming “open” …
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Conclusion & Thank YouConclusion & Thank You
Thank you for your time.
Contact:Eamon Walsh – [email protected]
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OGC Standards & OGC Standards & New Web Map ServicesNew Web Map Services
Which to Use When?Which to Use When?
EamonEamon WalshWalshCTO,CTO, eSpatialeSpatial
January 2007January 2007
