Download - Can You Trust Google Earth?
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Can You Trust Google Earth?
Math and Computer Science Department Seminar
Wheaton College
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Problem:
Get directions to Osseo Circle, Lincoln, NH
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MapQuest
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MapQuest
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MapQuest
Whoops!
Database problem
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Google Maps
Same problem!
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Google Earth
Dear Ol' Wheaton
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Google Earth
Something's amiss!
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Google Maps
Huh?
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Google Earth - Terrain
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Terrain Storage: DEM
DEM = Digital Elevation Model
Regular grid of elevation points
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Creating a DEM
Traditional
Spot Heights
Stereo Aerial Photography
AutomatedStereo Matching
Convert toDLG
Convert toDEM
Manual Contouring
Errors!
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Creating a DEM
Traditional
Spot Heights
State of the Art
Stereo Aerial Photography
AutomatedStereo Matching
Convert toDLG
Convert toDEM
Manual Contouring
Satellite
SAR
Plane
LiDAR
InternalRepresentation
Convert toDEM
Errors!
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DEM Error Viewer
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Error Visualization
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Error Visualization