// cpt-city: fme/metres/textbook (cpt)
//
// Gradients taken from the source-code of drawmap, a cartographic
// package by Fred M. Erickson
//
// author: Fred M. Erickson
// copyright: GPLv2
// year: 2005
// url: https://phillips.shef.ac.uk/pub/cpt-city/fme/metres
#declare textbook =
color_map {
  [0.00000 color rgbf <0.2353,1.0000,0.2353,0.0000>]
  [0.03333 color rgbf <0.5882,1.0000,0.1176,0.0000>]
  [0.06667 color rgbf <0.7843,1.0000,0.0000,0.0000>]
  [0.10000 color rgbf <0.8549,0.8824,0.0784,0.0000>]
  [0.13333 color rgbf <0.9294,0.8039,0.1569,0.0000>]
  [0.16667 color rgbf <1.0000,0.7255,0.2353,0.0000>]
  [0.20000 color rgbf <1.0000,0.5686,0.3725,0.0000>]
  [0.23333 color rgbf <1.0000,0.4902,0.4510,0.0000>]
  [0.26667 color rgbf <0.8824,0.5412,0.5882,0.0000>]
  [0.30000 color rgbf <0.7647,0.5961,0.5882,0.0000>]
  [0.33333 color rgbf <0.6471,0.6471,0.7059,0.0000>]
  [0.36667 color rgbf <0.8235,0.8235,1.0000,0.0000>]
  [0.40000 color rgbf <0.9098,0.9098,1.0000,0.0000>]
  [1.00000 color rgbf <1.0000,1.0000,1.0000,0.0000>]
}