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Triangulation Pillar OSBM S1580: Llyn Du   


Location
Grid reference: SN 77375 60577.
Landranger 146: Lampeter & Llandovery.
Landranger 147: Elan Valley & Builth Wells.
Explorer 187: Llandovery / Llanymddyfri, Llanwrtyd Wells & Llyn.
Waypoint: TP4493.

Neighbouring Triangulation Pillars
S5573 Garn Gron 3.41km to the west.
S5226 Esgair Cerig 4.76km to the south.
S6393 Bryn Crwn 6.02km to the southeast.
S5568 Pen-Y-Bannau 7.08km to the northwest.
S5960 Esgair Fraith 7.42km to the southwest.
The nearest fundamental bench mark is Lampeter, 20.96km to the southwest.
 
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