Keeping our fundamental bench marks in order

Guest blog by Colin Fane, Geodesy and Positioning Consultant Most people are familiar with trig pillars. There are over 7,000 of them scattered around Great Britain. However, there is another, considerably more elusive, type of pillar to be seen across the land – the fundamental bench mark (FBM). FBMs are the physical realisation of our … Continue reading Keeping our fundamental bench marks in order