Electronic Distance Measurement (E.D.M.) is an electronic device used for measuring the distance between two points through electromagnetic waves. Geodimeter, tellurometer or distomat are some of the electronic distance measurement instruments, introduced over the years. There has been a lot of improvement & development in EDM devices over a short span of years. These devices are used in numerous sports for measuring distances predominantly in track & field sports. EDM systems are mainly classified into three types based on carrier waves:
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