Heighting with Gps: Possibilities and Limitations
نویسنده
چکیده
Global Positioning System (GPS) surveying is now seen as a true three dimensional tool and GPS heighting can be a viable alternative to other more conventional forms of height measurement. This paper examines the limitations and possibilities of GPS heighting. The first part of the paper details the limitations of GPS heighting, including those factors that affect the GPS height measurement itself and the associated issues of geoid modeling and compatibility with the local vertical datum. The second part of the paper examines the possibilities for GPS heighting, focusing on three application areas currently generating interest for the practicing surveyor; deformation monitoring, real time GPS surveying and machine monitoring and guidance. These applications cover the range of achievable GPS heighting accuracy.
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