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0 pointstkcranny2y ago0 comments

From the article:

> WGS 84 is a global standard tied to no one plate. In essence, it is fixed to Earth’s deep interior.

Those drift vectors are based on GPS, which the article also says relies on WGS 84z

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saalweachter2y ago

And on fixed surveying markers around the globe.

You'll see them hither and yon, but my favorite is the miniature Washington Monument buried next to the real one.

smolder2y ago

For anyone curious about the buried mini-monument: https://www.atlasobscura.com/places/washington-mini-monument

hank19312y ago

Thank you for turning me on to Atlas Obscura! I downloaded the app, and have already marked several places I want to visit, and others that I've been to. Looking forward to working with it more!

I happened to have been in Thailand recently, and came across these statues holding up traffic lights. I found it fascinating that a city council would devote resources to something like this. I'm looking forward to seeing other treasures that Atlas Obscura has.

https://www.atlasobscura.com/places/krabi-traffic-lights

SketchySeaBeast2y ago

That's gonna be a trip for archaeologists in a few thousand years.

moffkalast2y ago

> it is fixed to Earth’s deep interior

Which is molten and also not static?

appletrotter2y ago

The core of the earth is solid no?

nobodyknowin2y ago

It's based on a center of mass point of the earth.

The system is an example of an "ECEF" or Earth Centered Earth Fixed system.

Good writeup here -

https://en.m.wikipedia.org/wiki/Earth-centered,_Earth-fixed_...

Edit - fixed center statement.

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