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Near Real Time Flood Area Analysis Based on SAR Image and GIS  

Sohn, Hong-Gyoo (School of Civil and Environment Eng., Yonsei University)
Song, Yeong-Sun (School of Civil and Environment Eng., Yonsei University)
Kim, Gi-Hong (GIS/LBS Project Center, Korea Institute of Construction Technology)
Yun, Kong-Hyun (School of Civil and Environment Eng., Yonsei University)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.4, no.4, 2004 , pp. 35-42 More about this Journal
Abstract
Accurate classification of water area is a preliminary step to analyze the flooded area and damages caused by flood. This is essential process for monitoring the region where annually repeating flood is a problem. The accurate estimation of flooded area can ultimately be utilized as a primary source of information for the policy decision. In this paper, flooded areas was classified using 1:25,000 land use map and a RADARSAT image of Ok-Chun and Bo-Eun located in Chung-Book province taken in 12th of August, 1998. Then we analyzed the flood area based on GIS. A RADARSAT image was used to classify the flooded areas with slope theme generated from digital elevation model. In processing on a RADARSAT image, the geometric correction was performed by a backwardgeocoding method based on ephemeris data and one control point for near real time flood area analysis.
Keywords
Classification of water area; Flood monitoring; RADARSAT image; Slope theme; GIS;
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