text: #|No relief shown
  a|Countours
  b|Shading
  c|Gradient and bathymetric tints
  d|Hachures
  e|Bathymetry/soundings
  f|Form lines
  g|Spot heights
  i|Pictorially
  j|Land forms
  k|Bathymetry/isolines
  m|Rock drawings
  z|Other type of relief
   |No attempt to code
  