A great earthquake and following great tsunami occurred on 11 March 2011 over the wide areas of the north-east of
Japan. The agricultural fields along the coast were submerged under the seawater caused by the Tsunami tidal wave for
some periods. The soil in such farmland suffered from salt of sea water. As soil salinity is hindrance to the crop growth,
the detection of Tsunami flooded farmland is important for agriculture. ALOS satellite data were obtained from March
13th including both optical sensor data and SAR data. And aerial photograph for photogrammetry was taken from the next day of the earthquake by Geospatial Information Authority of Japan. Many research institutes and universities
performed ground survey and made Tsunami flooded extent maps in that region. But as for cloud and large areas, SAR
data has advantage. Therefore the author tried detecting the Tsunami flooded extents from ALOS/PALSAR HH data. The
outline procedure of the analysis is threshold method for extracting the low backscattering areas as a black and white
color image, opening operation of mathematical morphology using a 3 by 3 filter size for clearing small islands, dilation
operation of mathematical morphology using a 3 by 3 filter size to establish united areas in the scene. The obtained
images are compared to aerial photograph and ground survey maps.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.