Evaluation of RTK-GPS and Total Station for applications in land surveying |
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Authors: | U Kizil L Tisor |
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Institution: | 1.Department of Technical Programs, Biga Vocational School,?anakkale Onsekiz Mart University,Biga,Turkey;2.Dickinson Research Extension Center,North Dakota State University,Dickinson,USA |
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Abstract: | Accuracies of Real-Time Kinematic Global Positioning (RTK-GPS) system and Total Station (TS) were investigated in GIS environment.
In geostatistical evaluations, Kriging method was used with spherical, exponential, and Gaussian models. The survey results
demonstrated that an area of 3.5 ha or smaller can be best explained with Gaussian model, while the larger areas require a
spherical model. A vertical error of 60 cm and a horizontal error of 30 cm can be observed when the survey points outside
the construction area are eliminated. The optimum area per survey point was calculated to be 20×20 m2 to increase the accuracy. This case study showed that an inaccurate survey can result cost over estimations up to 27%. |
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