# make a single map from bit N of Winchester to Newport IOW
#74210001: 2362592,-71808 to 2389984,-47168
#74210001 (50.69572448730469,-1.54083251953125) to (51.28349304199219,-1.012115478515625)
#74210001: 2362592,-73088 to 2389984,-50304
# maybe, to do better testing, split into 2 maps 
74210001: 2362592,-73088 to 2376288,-50304
74210002: 2376288,-73088 to 2389984,-50304