Control Survey

Control surveys establish reference points to use as starting positions for future surveys. Most other forms of survey will contain elements of control survey.

Establishment of horizontal and vertical controls in vast project area through the use of the survey grade GPS and GNSS. These controls are referred to existing NAMRIA PRS '92 (or its equivalent WGS '84) horizontal reference system and BCGS (Bureau of Coast and Geodetic Survey) established benchmarks.