Here's an example from the original survey of India. https://apps.lib.umich.edu/...

		ghaff on May 3, 2022 \| parent \| context \| favorite \| on: Using QGIS to apply a 1777 style to today's OpenSt... Here's an example from the original survey of India. 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.