Ordnance Survey Trig Point S3147 at Lickey Hills

myminifactory

This is a straightforward scan I conducted of the Ordnance Surveys' benchmark plate at the trig point atop Lickey Hills in Birmingham UK. Trig points like this were strategically placed throughout the UK to aid in surveying and map-making, but many have since vanished or fallen into disrepair due to the widespread adoption of GPS for land surveying, rendering them obsolete. Like most trig points, the benchmark plate is a Flush Bracket type, designed for determining height above sea level during surveys. Its bracket part refers to the holes at the top where a small metal bracket could be inserted, allowing a levelling staff to rest upon it during surveying operations. The O and S on the plate signify the Ordnance Survey, while the B and M denote Bench Mark. The S3147 marking serves as the unique reference number for this particular trig point. I've discovered an intriguing webpage about this trig point, featuring additional details and photographs, which I've linked below: http://trigpointing.uk/trig/4411 The scan was captured using the Sony 3D Creator app on an Xperia XZ1 Compact smartphone, which effectively rendered the shape of the plate.