Extraction of topographic features in landslide areas from ERS-1 SAR data

Author

Kusaka, Takashi ; Shikada, Masaaki ; Kawata, Yoshiyuki

Author_Institution

Kanazawa Inst. of Technol., Ishikawa, Japan

fYear

1993

fDate

18-21 Aug 1993

Firstpage

1222

Abstract

An analysis has been undertaken of characteristic features of the ERS-1 SAR image in areas where landslides may occur. First, statistical quantities of SAR data corresponding to landslide areas and non-landslide areas are computed for the study site (the Noto peninsula in Japan). As a result, it is shown that the difference of mean values of gray levels between landslide areas and non-landslide areas is of no significance. Moreover, the drainage system is extracted on the basis of the assumption that some streams will be defined by the dark strips caused by the combined effects of shadow and open water. It is found that the extracted drainage courses correspond to the dark strips that are visible on the SAR image as valleys

Keywords

geomorphology; geophysical techniques; remote sensing by radar; synthetic aperture radar; topography (Earth); ERS-1; Japan; Noto peninsula; SAR; drainage system; geology; geomorphology; geophysical measurement technique; hydrology; land surface imaging; landslide; radar; satellite remote sensing; stream; topographic feature; Data mining; Digital elevation models; Feature extraction; Pixel; Shape; Streaming media; Strips; Surfaces; Synthetic aperture radar; Terrain factors;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium, 1993. IGARSS '93. Better Understanding of Earth Environment., International

Conference_Location

Tokyo

Print_ISBN

0-7803-1240-6

Type

conf

DOI

10.1109/IGARSS.1993.322114

Filename

322114