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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.

Thanks!

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Are you sure you were going to ask it on askubuntu, not on gis.stackexchange.com? – Sergey Apr 24 '12 at 0:15
It seems like a general problem, but I'll post there as well. Often times I have programs which produce this kind of output, but not always in a way which can be directly mapped to GIS. – Richard Apr 24 '12 at 15:36

closed as off topic by Sergey, Bruno Pereira♦ Jun 18 '12 at 16:57

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