4 ms·
Imagine what it took to make the highly accurate topo maps they relied on.
by njarboe 3y ago
Imagine what it took to make the highly accurate topo maps they relied on.
- jiggawatts 3y agohttps://en.wikipedia.org/wiki/Great_Trigonometrical_Survey https://en.wikipedia.org/wiki/Great_Trigonometrical_Survey