Horizontal and Vertical Control Surveys
Field surveying activities typically begin with the establishment of horizontal and vertical control points. This process includes research of the public records to identify survey monuments in the vicinity of the project area that are identified on recorded maps. In addition we research the local agency benchmark data base to identify local benchmarks. Field surveys are then conducted to search for and locate existing survey monuments and to transfer the elevation from a known benchmark to the project site. Survey control can be established using either Global Positioning Systems technology or by conventional methods.