// cpt-city: bgs/sdtm (cpt)
//
// British Geological Survey, schemes from the GeoIndex site
//
// author: British Geological Survey
// copyright: Crown Copyright, UK Open Government Licence for Public Sector Information v3.0
// year: 2026
// url: https://phillips.shef.ac.uk/pub/cpt-city/bgs
#declare sdtm =
color_map {
  [0.00000 color rgbf <0.1608,0.2431,0.8824,0.0000>]
  [0.01449 color rgbf <0.1608,0.2431,0.8824,0.0000>]
  [0.01449 color rgbf <0.2196,0.4157,1.0000,0.0000>]
  [0.05797 color rgbf <0.2196,0.4157,1.0000,0.0000>]
  [0.05797 color rgbf <0.2314,0.5765,1.0000,0.0000>]
  [0.13043 color rgbf <0.2314,0.5765,1.0000,0.0000>]
  [0.13043 color rgbf <0.2000,0.7608,1.0000,0.0000>]
  [0.20290 color rgbf <0.2000,0.7608,1.0000,0.0000>]
  [0.20290 color rgbf <0.1020,0.9412,1.0000,0.0000>]
  [0.27536 color rgbf <0.1020,0.9412,1.0000,0.0000>]
  [0.27536 color rgbf <0.3490,1.0000,0.8824,0.0000>]
  [0.34783 color rgbf <0.3490,1.0000,0.8824,0.0000>]
  [0.34783 color rgbf <0.5608,1.0000,0.7294,0.0000>]
  [0.42029 color rgbf <0.5608,1.0000,0.7294,0.0000>]
  [0.42029 color rgbf <0.7137,1.0000,0.5608,0.0000>]
  [0.49275 color rgbf <0.7137,1.0000,0.5608,0.0000>]
  [0.49275 color rgbf <0.8392,1.0000,0.3882,0.0000>]
  [0.56522 color rgbf <0.8392,1.0000,0.3882,0.0000>]
  [0.56522 color rgbf <0.9333,1.0000,0.2196,0.0000>]
  [0.63768 color rgbf <0.9333,1.0000,0.2196,0.0000>]
  [0.63768 color rgbf <1.0000,0.9490,0.0000,0.0000>]
  [0.71015 color rgbf <1.0000,0.9490,0.0000,0.0000>]
  [0.71015 color rgbf <1.0000,0.7843,0.0000,0.0000>]
  [0.78261 color rgbf <1.0000,0.7843,0.0000,0.0000>]
  [0.78261 color rgbf <1.0000,0.6314,0.0000,0.0000>]
  [0.85507 color rgbf <1.0000,0.6314,0.0000,0.0000>]
  [0.85507 color rgbf <1.0000,0.4667,0.0000,0.0000>]
  [0.92754 color rgbf <1.0000,0.4667,0.0000,0.0000>]
  [0.92754 color rgbf <1.0000,0.3020,0.0000,0.0000>]
  [1.00000 color rgbf <1.0000,0.3020,0.0000,0.0000>]
}