Hi,
On my morning runs, I noticed a few weeks ago this plaque on the ground here. It mentions the Prime Meridian, and curiously doesn't mention the longitude in seconds, which is the error, it is about 50 seconds to the west of the Prime Meridian. There are other plaques containing some faded murals (?) on the ground laid out in a line with this plaque being at the start and end. What's the story behind it? Why is it incorrect?

https://preview.redd.it/1ypb1mdmqtrc1.jpg?width=4080&format=pjpg&auto=webp&s=99715c892b4c18bf0fb589c80a59d700f3deb3ad

by seriouslyfun95

3 comments
  1. It was recalculated and moved at one time. The old one wasn’t wrong but it was based on assumptions about the ideal shape of the earth which is now measured better.

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