[mapserver-users] Getting data values from heatmap

[Jan Hartmann]

Hi,

Is it possible to get the actual data values from the pixel values of a 
heatmap? A heatmap is computed by mapping a data range to values between 
0 and 255, and then displaying these values based on a color ramp. So 
what you see is a map with colors ranging from (say) blue to red. BLue 
are low data values, red high ones. Is it possible to generate a legend 
with the actual values for these colors?

Jan