Hi I am using the raster calculator to compute NDVI maps from nanosatellite images. I have one image (one out of many) for which the calculator produces an output image of Nan values. No problems with any of the other images.
The original 4-band 16-bit image has values in all channels - the histogram in properties dialog looks fine. I also used Clipper to cut out a small polygonal portion (an agricultural field) of the original satellite image, and that works, and similarly has positive pixel intensities in all 4 channels. But applying raster calculator also produces an image filled with NaN values. Can anyone suggest how I might detect the source of the error? Dvoralai -- *______________________**Geco Enterprises Ltda* *Centro de I+D * San Fernando, Chile *Tel: +56 (0)72 258 3066 *
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