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  • 1
    Publication Date: 2018-06-27
    Description: The use of remote sensing for irrigated areas, especially in the region of Guaira, Brazil (state of Sao Paulo), is examined. Major principles of utilizing LANDSAT data for the detection and mapping of irrigated lands are discussed. In addition, initial results obtained by computer processing of digital data, use of MSS (Multispectral Scanner System)/LANDSAT products, and the availability of new remote sensing products are highlighted. Future activities include the launching of the TM (Thematic Mapper)/LANDSAT 4 with 30 meters of resolution and SPOT (Systeme Probatorie d'Observation de la Terre) with 10 to 20 meters of resolution, to be operational in 1984 and 1986 respectively.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-173945 , NAS 1.26:173945 , INPE-2852-PRE/392
    Format: application/pdf
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  • 2
    Publication Date: 2016-03-09
    Description: Data obtained from aerial photographs (1:60,000) and LANDSAT return beam vidicon imagery (1:100,000) concerning drainage density, drainage texture, hydrography density, and the average length of channels were compared. Statistical analysis shows that significant differences exist in data from the two sources. The highly drained area lost more information than the less drained area. In addition, it was observed that the loss of information about the number of rivers was higher than that about the length of the channels.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: E82-10008 , NASA-CR-164906 , Reuniao Anual de SBPC; Sao Jose dos Campos; Brazil
    Format: application/pdf
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