Lecture14b

Lecture14b - Technical Issues for 3D Rendering(of...

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From: Workshop #9 Virtual Globes or Virtual Geographic Reality: How Much Detail Does a Digital Earth Require? Dr. Arzu Coltekin, University of Zurich Dr. Keith Clarke, University of California Santa Barbara Tuesday, November 16th, 7:45 am to 12:15 pm Technical Issues for 3D Rendering (of Geographic Content)
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Gore’s Earth in the Balance (1992) “A multi-resolution, three dimensional representation of the planet, into which we can embed vast quantities of geo- referenced data.” Source: http://www.filmweb.no
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Gore’s Digital Earth Hardware • virtual digital globe display • head-mounted display (immersive VR) • data glove Interactive Capabilities • voice recognition • zoom • search • 3-D visualization and movement • time-lines Source: www.5dt.com
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Interactive capability • Voice recognition • Navigation • Zoom: “Drill down”: Progression • Search • 3-D visualization and movement • Time-line • Multimedia : web portals
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Content • “numerous kinds of data” = Themes • Participant content • Seamlessly fused • Hyperlinks • Multi-temporal http://www.ruraltech.org
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Virtual Globes: Wikipedia A virtual globe is a 3D software model or representation of the Earth or another world. A virtual globe provides the user with the ability to freely move around in the virtual environment by changing the viewing angle and position. Compared to a conventional globe , virtual globes have the additional capability of representing many different views on the surface of the Earth. These views may be of geographical features, man-made features such as roads and buildings , or abstract representations of demographic quantities such as population. In 1998 , Microsoft released a popular offline virtual globe in the form of Encarta Virtual Globe 98 . The first widely publicized online virtual globes were NASA World Wind (released in mid-2004) and Google Earth (mid-2005).
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Examples NASA World Wind * CitySurf Globe Bing Maps SkylineGlobe Google Earth Marble , part of the K Desktop Environment , with OpenStreetMap * ArcGIS Explorer EarthBrowser Earth3D * WorldView Bhuvan
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Lecture14b - Technical Issues for 3D Rendering(of...

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