// cpt-city: jjg/dem/gebco-shelf (cpt)
//
// Various digital elevation models (DEM) schemes
//
// author: J.J. Green
// copyright: Public domain
// year: 2004
// url: https://phillips.shef.ac.uk/pub/cpt-city/jjg/dem
#declare gebco_shelf =
color_map {
  [0.00000 color rgbf <0.0000,0.9412,1.0000,0.0000>]
  [0.14286 color rgbf <0.0000,0.9412,1.0000,0.0000>]
  [0.14286 color rgbf <0.1373,1.0000,1.0000,0.0000>]
  [0.28571 color rgbf <0.1373,1.0000,1.0000,0.0000>]
  [0.28571 color rgbf <0.3529,1.0000,1.0000,0.0000>]
  [0.42857 color rgbf <0.3529,1.0000,1.0000,0.0000>]
  [0.42857 color rgbf <0.5490,1.0000,0.9020,0.0000>]
  [0.57143 color rgbf <0.5490,1.0000,0.9020,0.0000>]
  [0.57143 color rgbf <0.6471,1.0000,0.8431,0.0000>]
  [0.71429 color rgbf <0.6471,1.0000,0.8431,0.0000>]
  [0.71429 color rgbf <0.7647,1.0000,0.8431,0.0000>]
  [0.85714 color rgbf <0.7647,1.0000,0.8431,0.0000>]
  [0.85714 color rgbf <0.8235,1.0000,0.8431,0.0000>]
  [0.92857 color rgbf <0.8235,1.0000,0.8431,0.0000>]
  [0.92857 color rgbf <0.9020,1.0000,0.9412,0.0000>]
  [0.97143 color rgbf <0.9020,1.0000,0.9412,0.0000>]
  [0.97143 color rgbf <0.9216,1.0000,1.0000,0.0000>]
  [1.00000 color rgbf <0.9216,1.0000,1.0000,0.0000>]
}