Download presentation
Presentation is loading. Please wait.
Published byReynold Dorsey Modified over 9 years ago
1
Can You Trust Google Earth? Math and Computer Science Department Seminar Wheaton College
2
Problem: Get directions to Osseo Circle, Lincoln, NH
3
MapQuest
5
Whoops! Database problem
6
Google Maps Same problem!
7
Google Earth Dear Ol' Wheaton
8
Google Earth Something's amiss!
9
Google Maps Huh?
10
Google Earth - Terrain
11
Terrain Storage: DEM DEM = Digital Elevation Model Regular grid of elevation points
12
Creating a DEM Traditional Spot Heights Stereo Aerial Photography Automated Stereo Matching Convert to DLG Convert to DEM Manual Contouring Errors!
13
Creating a DEM Traditional Spot Heights State of the Art Stereo Aerial Photography Automated Stereo Matching Convert to DLG Convert to DEM Manual Contouring Satellite SAR Plane LiDAR Internal Representation Convert to DEM Errors!
14
DEM Error Viewer
15
Error Visualization
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.