# cpt-city: pd/astro/mars_sand_dunes01 (cpt)
#
# Gradients from photographs
#
# author: Piecrust Design
# copyright: Public domain
# year: 2007
# url: https://phillips.shef.ac.uk/pub/cpt-city/pd/astro
  0.00    19/26/38    2.08    18/25/36
  2.08    18/25/36    4.17    18/24/33
  4.17    18/24/33    6.25    18/25/34
  6.25    18/25/34    8.33    19/26/36
  8.33    19/26/36   10.42    24/30/41
 10.42    24/30/41   12.50    28/34/46
 12.50    28/34/46   14.58    32/38/50
 14.58    32/38/50   16.67    36/43/55
 16.67    36/43/55   18.75    42/52/67
 18.75    42/52/67   20.83    48/61/79
 20.83    48/61/79   22.92   67/84/104
 22.92   67/84/104   25.00  87/106/129
 25.00  87/106/129   27.08 104/121/140
 27.08 104/121/140   29.17 122/137/152
 29.17 122/137/152   31.25 120/132/142
 31.25 120/132/142   33.33 118/126/133
 33.33 118/126/133   35.42 106/117/127
 35.42 106/117/127   37.50  95/108/120
 37.50  95/108/120   39.58  91/102/114
 39.58  91/102/114   41.67   86/97/109
 41.67   86/97/109   43.75   78/90/104
 43.75   78/90/104   45.83    70/82/98
 45.83    70/82/98   47.92    68/81/98
 47.92    68/81/98   50.00    65/79/98
 50.00    65/79/98   52.08    62/77/96
 52.08    62/77/96   54.17    60/74/93
 54.17    60/74/93   56.25    60/74/92
 56.25    60/74/92   58.33    60/74/92
 58.33    60/74/92   60.42    60/74/91
 60.42    60/74/91   62.50    60/73/91
 62.50    60/73/91   64.58    61/74/91
 64.58    61/74/91   66.67    61/74/90
 66.67    61/74/90   68.75    62/75/91
 68.75    62/75/91   70.83    63/76/92
 70.83    63/76/92   72.92    64/76/91
 72.92    64/76/91   75.00    65/77/91
 75.00    65/77/91   77.08    67/78/92
 77.08    67/78/92   79.17    68/80/93
 79.17    68/80/93   81.25    69/81/95
 81.25    69/81/95   83.33    70/82/96
 83.33    70/82/96   85.42    71/83/97
 85.42    71/83/97   87.50    72/84/98
 87.50    72/84/98   89.58   74/85/101
 89.58   74/85/101   91.67   75/87/103
 91.67   75/87/103   93.75   75/87/104
 93.75   75/87/104   95.83   75/88/105
 95.83   75/88/105   97.92   76/89/106
 97.92   76/89/106  100.00   77/90/107