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Article: DEM decisions: Ferris State University team evaluates and utilizes national digital elevation models for orthophotography applications.
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- Article date:
- August 1, 2006
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CopyrightCOPYRIGHT 2006 BNP Media. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Two of the freely available national Digital Elevation Model (DEM) data sets--the National Elevation Dataset (NED) and the Shuttle Radar Topographic Mission (SRTM)--are important for many engineering and mapping applications. Compared to surfaces derived from Real-Time Kinematic (RTK) GPS surveying, these DEMs have various qualities and different limitations. At Michigan's Ferris State University, a team of students and professors performed a study to demonstrate the use of these freely available data for orthophotography creation.
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Accuracy Requirements for Elevations
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