r.mapcalc, floating-point

Joe Marlow jem at finwagon.engr.arizona.edu
Sun Jun 13 21:20:32 EDT 1993

When performing floating-point arithmetic on image data with r.mapcalc, the
result files inflate by a factor of four of the original file size.  I checked
the file headers and found that the result files have 4 bytes per cell instead
of 1 byte per cell as in the original image files. This is the case even
though the cell values are integers.  Does anyone know how I can get result
files that have one byte per cell? I don't have room on my disk to store
the huge files, but I need to perform floating-point operations on the images.
Thanks in advance for the help. 

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