- 1750 - 
Colorado/Tom and Miller 
  
  
  
  
  
(a) topographic elevation 
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(c) topographic aspect (d) solar insolation 
FIGURE 6.2. GRAYMAPS OF THE PHYSIOGRAPHIC AND SOLAR INSOLATION 
DATA PLANES OVERLAYING THE LANDSAT MSS BANDS. The elevation data 
plane (a) was sampled cell-by-cell from the 1:24,000 scale U.S.G.S. topographic map. 
| Slope (b) and aspect (c) were computed from the elevation plane. The near- 
| instantaneous incoming solar insolation (d) was computed for the time of the 
LANDSAT overpass using the slope and aspect data planes.