Comments:
OB905CA Differential GPS:
The geodetic benchmark used to set up a base station was located at the
Oceanside Water Pollution Control Plant located on the opposite side of the
Great Highway from Ocean Beach in the central portion of the survey area.
The horizontal coordinates in NAD83 were 37 43' 39.89423"W and
122 30' 20.62585"N, with an ellipsoid height of -10.902 m and NAVD88 elevation
of 21.853 m. When necessary, a radio repeater was set up on the roof of the
Cliff House restaurant to help extend radio coverage to southern portions of
the beach where cliffs block the radio signal.
