BCGS 1:2,500 scale grid, North Amercian Datum 1927. The British Columbia Geographic System is a geographic system in which the coverage in minutes and seconds of longitude is double the coverage in minutes and seconds of latitude for sheets at all scales.This particular grid was generated in the older NAD27 datum to replicate historic Water Rights paper maps used by surface water rights management program

BCGS 1:2,500 scale grid, North Amercian Datum 1983. The British Columbia Geographic System is a geographic system in which the coverage in minutes and seconds of longitude is double the coverage in minutes and seconds of latitude for sheets at all scales