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The chapter delves into the principles and applications of Electronic Distance Measurement (EDM), Total Stations, and Global Positioning System (GPS/GNSS) in modern surveying. It emphasizes the advantages these technologies bring in terms of accuracy, reduced manpower requirements, and efficiency in data collection. The chapter also outlines various components, working mechanics, classifications, and error sources associated with these instruments, enhancing students' understanding and capabilities in surveying applications.
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References
3a.pdfClass Notes
Memorization
What we have learnt
Final Test
Revision Tests
Term: Electronic Distance Measurement (EDM)
Definition: A device that uses electromagnetic waves to measure distance from the instrument to a target.
Term: Total Station
Definition: An integrated instrument combining an electronic theodolite and EDM used for surveying that measures distances and angles.
Term: Global Positioning System (GPS)
Definition: A satellite-based navigation system that provides precise location and time information globally.
Term: Phase Shift Method
Definition: A measurement technique used in modern EDMs to determine distances by calculating the phase difference of emitted and received signals.