I've created hillshade raster (arcGis9.3) and I have 16Bit tiff image ( please see attached) I need to submit 1band/8Bit with grey level (0-255) and set NoData for all pixels outside of the survey limit. My problem is while I m changing to 8bits my nodata pixel change to 0 value, which is wrong. How can I change this correctly and don't change NoData to 0? For simple operation I can use alo ARcGis10, I don't have any extension for this version
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