Hello, Jeff, Thank you very much. Now I understand the procedure, because I found the "additional input grid" in the tools Train and Classify. My Problem now: When converting the pixel depth of my composited image (32 Bit to 8 Bit signed), the values change. (My first attempt was to change the pixel depth by exporting the data. My second attempt was to use the "Raster copy" tool). My range of cell values are all between -128 to 127 (8Bit signed). Example - My Composited Image with the following bands: Band 1: NDVI values with -0,53086 minimum and 0,68932 maximum Band 2: Values of LAS data with -85,0409 minimum and 81,5664 maximum Band 3: Values of the Green NDVI with -0,70854 minimum and 0,61344 maximum Band 4: Values of the NDWI with -0,61344 minimum and 0,7085 maximum When converting from 32bit to 8bit the following happens Band 1: NDVI values with -1 minimum and 127 maximum Band 2: Values of LAS data with -85 minimum and 82 maximum Band 3: Values of the Green NDVI with -1 minimum and 127 maximum Band 4: Values of the NDWI with -1 mininum and 127 maximum How can I keep my previous values without anything changing of my values so much? Thanks for your help, Janine
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