Please use this identifier to cite or link to this item: http://hdl.handle.net/10125/20606

Global Positioning System and Total Station Field Methods Utilized to Derive the Accuracy of USGS 10-Meter Digital Elevation Models on Oahu

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Item Summary

Title:Global Positioning System and Total Station Field Methods Utilized to Derive the Accuracy of USGS 10-Meter Digital Elevation Models on Oahu
Authors:Silver, Joseph R.
Contributors:Wingert, Everett (advisor)
Geography and Environment (department)
Keywords:USGS DEM
GPS data collection
digital elevation models
DEMs
United States Geologic Survey
show 3 moreUSGS
global positioning system
GPS
show less
Date Issued:May 2008
Publisher:[Honolulu] : [University of Hawaii at Manoa], [May 2008]
Abstract:Through my own experience with DEM reliability and usage on Oahu, I have found inaccuracies within the data. Working with the 10-Meter DEM data for cartographic production purposes has been challenging when these errors present themselves. Unfortunately, public misconception and undiscerning use of the data results from these errors and inconsistencies. Specifically, some coastal areas are depicted as being flat and/or below sea level, and some hillsides are misrepresented. Coastal areas have been depicted as being underwater especially when errors in sea level height are present. Hillsides have been represented with steep and jagged edges, when the terrain is actually smooth with a gentle upslope. In addition, terrain with abrupt up slopes that transition from low lying areas to hillsides are inconsistently represented within the DEM. These areas of inconsistency are the reason for my inquiry into the accuracy of 10-meter DEMs. The data set in question is the 10-Meter Level 2 DEM quadrangles provided by the USGS for Oahu.
The methodology undertaken to test the USGS data is a new approach to determining DEM accuracy. The combination of technologies, and the manner with which they are utilized, is a new technique that has its roots in field methods. Past researchers have taken a variety of approaches to determining DEM accuracy, and some of those techniques are outlined in the following chapter. The goal of this research is to determine if this method is a reliable approach to DEM accuracy inquiry. If so, future researchers can continue the effort and conduct field methods in a similar fashion.
Description:MA University of Hawaii at Manoa 2008
Includes bibliographical references (leaves 92–93).
Pages/Duration:viii, 93 leaves, bound : illustrations, maps ; 29 cm
URI/DOI:http://hdl.handle.net/10125/20606
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: M.A. - Geography


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