Remote Sensing Digital Image Analysis: An Introduction
Remote Sensing Digital Image Analysis: An Introduction
Remote Sensing, Third Edition: Models and Methods for Image Processing
Remote Sensing, Third Edition: Models and Methods for Image Processing
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The Bay of Santander is a very important environmental element, located in the north of Spain (Cantabria). Human spills to convert sea into land started about 1850 and gradually change the tide prism. This produced the Bay to start filling up and consequently, problems for the safety navigation. Whence the navigational channel must be periodically measured and dredged. Marsh, dunes or estuaries use to be characterized by their high natural values what usually cause them to be subjected to high protection levels that make the activities sought to develop inside. The current work compiles and developed process to estimate the grain size (sand, silt, clay, silty loam, sandy clay loam,...), Pb and Zn contents, and ripples from hyperspectral data. The data were obtained in June 2005 by the Catalonian Cartographic Institute (ICC). The ICC has an airborne sensor (Compact Airborne Spectrographic Imager-CASI) which let the user setup temporal, radiometric and spatial resolution according to the requirements (36 bands and 4 m. spatial resolution). This makes possible to collect data in the optimum tide level and brightness conditions and so they can be considered as an interesting tool to monitor depths, grain size and ripples. Results show that accuracy is highly dependent of the radiometric and atmospheric corrections, but it can be used as a practical tool for deriving thematic cartography of grain size and inorganic sediments in coastal environments; cheaper than classical chemical field methods.