Error DEM ALOS PALSAR

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Lorena Souza

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May 27, 2020, 8:25:27 PM5/27/20
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Hello people ,

When performing procedures (mosaic, slope) with the DEM made available by the alos satellite, the DEM has "faults" with null values ​​(as shown). Does anyone know what it can be and if it is necessary to make corrections or treatment before using it?
WhatsApp Image 2020-05-27 at 21.24.13.jpeg
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