# cpt-city: bgs/sand (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
  0    122/43/5   10    156/54/3 L
 10    156/54/3   20    193/71/3 L
 20    193/71/3   30   221/95/11 L
 30   221/95/11   40  240/123/25 L
 40  240/123/25   50  252/153/42 L
 50  252/153/42   60  254/184/69 L
 60  254/184/69   70 253/210/109 L
 70 253/210/109   80 254/231/153 L
 80 254/231/153   90 254/245/185 L
 90 254/245/185  100 255/252/213 B