ABSTRACT
The closed-path polygonal survey is used in civil engineering works and rural cadastral and surveying mapping. In closed-path polygonal traverses, the vertices made in the survey returned to the starting point by walking, forming a figure with closed geometry. This enables to check the angles and distances observed in relation to the accuracy required in different types of topographic surveys. As a computation practice, survey data are used from a survey performed by walking using internal angles, counterclockwise, of a closed-path traverses polygon, with a mechanical theodolite, around a building. The corners of the building are defined as details by irradiation. The calculations for mapping the points, determining the linear closure error, relative accuracy, partial and final coordinates, area calculation and the surveyed perimeter are performed in R by the Bowditch method. Then, it is demonstrated how to store the data as spatial points with attributes used in geographical information systems and Google Earth.
