Title :
Extraction of Stream Channels in High-Resolution Digital Terrain Images Using Morphology
Author :
Cho, Hyun-chong ; Srinivasan, Sridhar ; Sedighi, Ali ; Slatton, K.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Florida, Gainesville, FL
fDate :
July 31 2006-Aug. 4 2006
Abstract :
Our paper proposes an approach for the extraction of stream channels from airborne laser swath mapping (ALSM) data. Recent advances in technology have led to high-resolution topographic data acquisition by means of ALSM yielding digital elevation model (DEM) datasets with horizontal resolutions of lm and a vertical accuracy of 0.15 m. We apply morphological operations on an ALSM DEM to detect stream channels. The results are compared with an existing terrain analysis tool known as TauDEM. Tools like TauDEM use morphology over large-scale areas but they often fail in detecting stream networks over small-scale areas. The proposed method uses small-scale morphology to provide complementary results for streamline locations over a small catchment area.
Keywords :
data acquisition; digital elevation models; geophysical signal processing; image processing; remote sensing by laser beam; rivers; terrain mapping; TauDEM; airborne laser swath mapping data; digital elevation model datasets; high-resolution digital terrain images; image extraction; morphological operations; small-scale morphology; stream channels; streamline locations; terrain analysis tool; topographic data acquisition; water catchment area; Data engineering; Data mining; Digital elevation models; Laser modes; Laser radar; Morphology; Optical pulses; Sea measurements; Streaming media; Water resources;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2006. IGARSS 2006. IEEE International Conference on
Conference_Location :
Denver, CO
Print_ISBN :
0-7803-9510-7
DOI :
10.1109/IGARSS.2006.278