Ordnance Survey:
Extract from OS Explorer Map
Ordnance Survey:
Extract of OS Explorer Map
Ordnance Survey:
Ramsden 18 inch theodolite
Ordnance Survey:
Ramsden 18 inch theodolite
Ordnance Survey:
Nicholas Crane visits Ordnance Survey
Ordnance Survey:
Nicholas Crane visits Ordnance Survey
Ordnance Survey:
The Duke of Edinburgh meets children from the nearby Explorers nursery
Ordnance Survey:
Duke of Edinburgh wearing 3D glasses
Ordnance Survey:
The Duke signing the Ordnance Survey visitors book
Ordnance Survey:
1801 map of Kent
Ordnance Survey:
1969 opening
Ordnance Survey:
Keeping track of changes to the landscape