I have a program which prints out an NxM rectangular ASCII data grid which may have either integer or floating point values. There is no practical upper or lower limit to these values.
I would like suggestions of a program which could read in this rectangular grid and display it in colour. The program should also have the capability to rescale the data so that I can isolate ranges of interest, it would be nice if the rescaling could be nonlinear.
This is somewhat of a GIS application, so answers dependent upon conversion to the GeoTIFF format are acceptable.
Gimp did not work for me, so if you suggest it, you should be very specific about how to get it to display the GeoTIFF format.