The color assigned to each pixel represents the intensity of the returned signal. The color bar on the large scale plot shows the color assigned to each range of measured signal returns in digitizer counts. The raw count values range from zero for no return to a value less than 4000 for the strongest return. The color scale for each plot varies with the strength of the signal.
The horizontal axis of the large plot is annotated with latitude-longitude. The vertical axis is annotated to indicate altitude in kilometers.