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 two by three meter trench was established with the NW corner at a location of 29 S/8 W
The coordinates of the four corners of CB 45 at the time of the start of the 2011 season are as follows:
NW corner: 29S/8W
SW corner: 31S/8W
SE corner: 31S/11W
NW corner: 29S/11W
A datum point with an absolute elevation of 31.20 m was established on a tree located near the southeast corner of the trench.
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