Mining Quest - A Piece of History

Lv20 Mining Quest - A Piece of History: ??? Map Markers inaccurate

The ??? map markers are inaccurate on the 2 of the items
needed to gather for quest completion.

The first item:
"Ewer Fragment", was the only one that was accurate placed on map.

The second item:
"Sheep's eye" was found further west (if i remember correctly)
from the shown ??? marker on map.

The third item:
"Petrified Wood" was found at (14,30), due southeast of Camp Horizon,
not even close at all to the shown map-marker.

Edit:
The shown map markers are really confusing here, and should either be changed to a more accurate location or a wider yellow marker that shows how big area you have to search in.

The ??? are only a basis point to start your search.
You need to use the abilities as a Miner to find the actual node, this is because as people mine them they move around and its impossible to have a '100%' node