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Terrain area estimation by using polygons based on visual lisp

Abstract:

This work presents a computer program that calculates the terrain area raised by polygons using programming in AutoCAD based on Visual LISP. The angles and distances between each station and the corresponding detail points (if any) must be obtained in the field with theodolite or total station, in order to make the adjustment of the closed traverse, which consists of correcting the angle readings, transforming these angle readings from the stations to azimuths, obtaining and correcting the east-north projections, and evaluating the type of topographical survey performed. Thus, we obtain the final coordinates which allows us to compute the land area with its corresponding graph. The results of the calculation and traverse adjustment, as well as the coordinates obtained, are compared with an Excel spreadsheet. This application offers a better alternative to electronic sheets used in topography, because users do not have to modify the data structure and formulas, but only worry about data collection. It will also encourage undergraduate students of Civil Engineering to develop their own functions or commands for AutoCAD and add them to the existing native functions, in order to optimize the time not only in drawing but in different related disciplines.