The boundaries of the trench were laid out using a baseline shot with the transit off the grid point PC 1 and a second baseline extending at a 90 degree angle. Using triangulation a three by three meter trench was established with the NW corner at a location of 11N/1W.
The coordinates of the four corners of CA 64 at the time of the start of the 2010 season are as follows:
NW corner: 11N/1W
NE corner: 11N/2E
SE corner: 8N/2E
SW corner: 8N/1W
A datum point with an absolute elevation of 30.12m was established on a tree located near the southeast corner of the trench.
Trench layout drawing
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