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Extracting topographic structure from digital elevation data for geographic information system analysis. Photogrammetric Engineering and Remote (1988)
| Venue: | Sensing |
| Citations: | 235 - 0 self |
BibTeX
@ARTICLE{Jenson88extractingtopographic,
author = {S. K. Jenson and J. O. Domingue},
title = {Extracting topographic structure from digital elevation data for geographic information system analysis. Photogrammetric Engineering and Remote},
journal = {Sensing},
year = {1988},
volume = {54},
pages = {1593--1600}
}
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Abstract
ABSTRACT: Software tools have been developed at the U.S. Geological Survey’s EROS Data Center to extract topographic structure and to delineate watersheds and overland flow paths from digital elevation models. The tools are special purpose FORTRAN programs interfaced with general-purpose raster and vector spatial analysis and relational data base management packages. The first phase of analysis is a conditioning phase that generates three data sets: the original DEM with depressions filled, a data set indicating the flow direction for each cell, and a flow accumulation data set in which each cell receives a value equal to the number of cells that drain to it. The original DEM and these three derivative data sets can then be processed in a variety of ways to optionally delineate drainage networks, overland paths, watersheds for user-specified locations, sub-watersheds for the major tributaries of a drainage network, or pour point linkages between watersheds. The computer-generated drainage lines and watershed polygons and the pour point linkage information can be transferred to vector-based geographic information systems for further analysis. Comparisons between these computer generated features and their manually delineated counterparts generally show close agreement, indicating that these software tools will save analyst time spent in manual interpretation and digitizing.
Keyphrases
topographic structure geographic information system analysis digital elevation data photogrammetric engineering data set original dem drainage network software tool eros data center user-specified location close agreement vector spatial analysis overland flow path vector-based geographic information system flow accumulation data set relational data base management package general-purpose raster point linkage flow direction conditioning phase major tributary digital elevation model u.s. geological survey watershed polygon analyst time derivative data set computer-generated drainage line first phase special purpose fortran program pour point linkage information manual interpretation
