GEOG 862
GPS and GNSS for Geospatial Professionals

Static GPS Control Surveying


Diagram showing Static GPS with Post-Processed Differential Correction

Static GPS with Post-Processed Differential Correction
Source: GPS for Land Surveyors

Static GPS surveying has been used on control surveys from local to statewide extent, and will probably continue to be the preferred technique in that category. If a static GPS control survey is carefully planned, it usually progresses smoothly. The technology has virtually conquered two stumbling blocks that have defeated the plans of conventional surveyors for generations. Inclement weather does not disrupt GPS observations, and a lack of intervisibility between stations is of no concern whatsoever, at least in postprocessed GPS. Still, GPS is far from so independent of conditions in the sky and on the ground that the process of designing a survey can now be reduced to points-per-day formulas, as some would like. Even with falling costs, the initial investment in GPS remains large by most surveyors’ standards. However, there is seldom anything more expensive in a GPS project than a surprise.

In static GPS surveying the receivers is motionless for a time, usually a relatively long occupation. If it's planned correctly, a GPS static survey can be independent of some of the things that have plagued such work in the past. However, there are some things that need to be considered—overhead obstructions, access between points, and so on.