Benchmark

I have an irrational fascination - benchmarks!

Here is some general info:

en.wikipedia.org/wiki/Benchmark_(surveying)

 

if you are in UK, you might have some near you. You can search for them, here:

www.ordnancesurvey.co.uk/geodesy-positioning/legacy-data/...(BMs,local%20mean%20sea%20level%20datums.

 

There's an intereactive map:

interactivemaps.uk/os-benchmark-archive/#7.82/53.521/-1.889

 

This one is on the wall at Moor Gate. I hadn't noticed it before today. Good thing it wasn't a snake instead!

 

 

Done