On may bridges I will see signs saying things like 15m 37ch. Above it will be a code for that structure. It will consist of letters and numbers, the numbers going in sequence with the occasional letter added on the end if one number is used twice.
I don't have any photos on my phone right now to show an example.
The m stands for miles and the ch for chains and these will be the distance of the structure from an origin point.
Does anyone know if a list of origin points exists publicly anywhere? I'd love to be able to pass such a sign and then look up the location that it is a set distance from.
I don't have any photos on my phone right now to show an example.
The m stands for miles and the ch for chains and these will be the distance of the structure from an origin point.
Does anyone know if a list of origin points exists publicly anywhere? I'd love to be able to pass such a sign and then look up the location that it is a set distance from.
Last edited: