Electronic Surveying: Accuracy of Electronic Positioning Systems

by Henry W. Bigelow,

Serial Information: Journal of the Surveying and Mapping Division, 1963, Vol. 89, Issue 3, Pg. 37-76

Document Type: Journal Paper


There are different electronic systems used for positioning and navigation classified by the kind of line of position generated: hyperbolic, circular, radial or composite. Their accuracy is a function of repeatability and predictability. These terms are defined and analysed. Methods are developed by which the user may determine the reliability of a given installation at a given point, or over a given area. Repeatability is the measure of the reliability with which the system permits the user to return to a given spot, using the electronic lines of position generated by the system. This depends on known quantities which can be evaluated. Predictability is the measure of the reliability with which the system can define the location of a given point in terms of geographic coordinates. Evaluation of the factors involved is difficult. At present (1963) they can only be derived empirically. More knowledge is needed.

Subject Headings: Geomatic surveys | System reliability | Navigation (geomatic) | Radiation | Composite materials | Permits | Empirical equations

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