Comparisons of Three Types of DEMs: A Case Study of the Randleman Reservoir, North Carolina

Comparisons of Three Types of DEMs: A Case Study of the Randleman Reservoir, North Carolina Abstract: Three major developments in the delivery of digital elevation models (DEMs) to the general public include the USGS national elevation dataset (NED), worldwide Shuttle Radar Topography Mission (SRTM) DEM for land area between latitudes 60°N and 60°S, and light detection and ranging (LIDAR) DEM for the state of North Carolina. These DEMs were created using different acquisition methods and technologies, and they can differ in how they represent the topography of the same area. This paper assesses the differences in these DEMs and illustrates how these differences can produce different analytical outcomes when used to study local problems. The Randleman Reservoir project in Guilford and Randolph counties, North Carolina, is used as a case study for comparing the DEMs. We found that a) the USGS, SRTM, and LIDAR DEMs differed, b) modeled reservoir extents and volumetric capacities differed substantially, with the USGS DEMs producing the smallest capacity and extent measurements and the LIDAR DEM producing the largest, and c) there was noncontiguous “ponding” on the reservoir extents derived from the USGS or SRTM DEM, but almost no “ponding” on the reservoir extents derived from the LIDAR DEM. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Southeastern Geographer University of North Carolina Press

Comparisons of Three Types of DEMs: A Case Study of the Randleman Reservoir, North Carolina

Southeastern Geographer, Volume 48 (1) – Jul 10, 2008

Loading next page...
 
/lp/university-of-north-carolina-press/comparisons-of-three-types-of-dems-a-case-study-of-the-randleman-pfYWznXqpV
Publisher
University of North Carolina Press
Copyright
Copyright © 2008 Southeastern Division of the Association of American Geographers
ISSN
1549-6929
Publisher site
See Article on Publisher Site

Abstract

Abstract: Three major developments in the delivery of digital elevation models (DEMs) to the general public include the USGS national elevation dataset (NED), worldwide Shuttle Radar Topography Mission (SRTM) DEM for land area between latitudes 60°N and 60°S, and light detection and ranging (LIDAR) DEM for the state of North Carolina. These DEMs were created using different acquisition methods and technologies, and they can differ in how they represent the topography of the same area. This paper assesses the differences in these DEMs and illustrates how these differences can produce different analytical outcomes when used to study local problems. The Randleman Reservoir project in Guilford and Randolph counties, North Carolina, is used as a case study for comparing the DEMs. We found that a) the USGS, SRTM, and LIDAR DEMs differed, b) modeled reservoir extents and volumetric capacities differed substantially, with the USGS DEMs producing the smallest capacity and extent measurements and the LIDAR DEM producing the largest, and c) there was noncontiguous “ponding” on the reservoir extents derived from the USGS or SRTM DEM, but almost no “ponding” on the reservoir extents derived from the LIDAR DEM.

Journal

Southeastern GeographerUniversity of North Carolina Press

Published: Jul 10, 2008

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off