2 ms·
Thanks! It still a bit unclear to me but I'll dig more. Cheers
by pachico 4y ago
Thanks! It still a bit unclear to me but I'll dig more.
Cheers
- ghaff 4y agoHere's an example from the original survey of India. https://apps.lib.umich.edu/online-exhibits/exhibits/show/india-maps/survey https://apps.lib.umich.edu/online-exhibits/exhibits/show/ind... In the US, if you hike, you'll often find circular USGS survey markers inset into mountain and hill tops.