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POLYGONAL TOPOGRAPHY ENGINEERING - Azimuth Calculation (data: internal angles and starting azimuth) http://psvideoaulas.com Topography Video Lesson - Walking Method for collecting field data to calculate the azimuths of a polygon. From the internal or external angles and the starting azimuth, it is possible to determine the azimuths of the other vertices (solutions: analytical and graphical). Excel spreadsheet (.xlsm) available with the systematization of calculations (including functions incorporated in Visual Basic) that can be downloaded from our website: http://psvideoaulas.com POLYGONAL TOPOGRAPHY ENGINEERING - Azimuth Calculation (data: internal angles and starting azimuth)