Application of remote sensing techniques to hydrography with emphasis on bathymetry / Aplicacao de tecnica de sensores remotos na hidrografia, com enfase a batimetria

AUTOR(ES)
DATA DE PUBLICAÇÃO

1979

RESUMO

Remote sensing techniques are utilized for the determination of hydrographic characteristics, with emphasis in bathymetry. Two sensor systems were utilized: the Metric Camera Wild RC-10 and the Multispectral Scanner of LANDSAT Satellite (MSS- LANDSAT). From photographies of the metric camera, data of photographic density of points with know depht, are obtained. A correlation between the variables density x depth is calculated, through a regression straight line. From this line, the depth of points with know photographic density is determined. LANDSAT MSS images are interpreted automatically in the Iterative Multispectral Analysis System (I-100), with the obtention of point subareas with the same gray level. With some simplifications done, it is assumed that the depth of a point it is directly related with its gray level. Then, subareas with points of the same depth are determined and isobathymetric curves are drawn. The coast line is obtained through the sensor systems already mentioned. Advantages and limitations of the techniques and of the sensor systems utilized, are discussed and the results are compared with earth truth.

ASSUNTO(S)

satelites landsat processamento de imagens cabo frio (rj) oceanografia batimetria oceanography sisteam multiespectral de varredura hidrografia fotointerpretacao bathymeters coastal water photointerpretation hydrology metric photography i-100 sistemas multiespectrais de varredura image processing

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