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Before planning a project, it is absolutely important to get the accurate shape of project area. Because the project land shape may not always be exact rectangular or any other regular shape. In this case manual hand survey can not produce accurate measurement. Because tapes and chains have lots of limitations and errors. That’s why the digital survey comes in handy. What makes the digital land survey so accurate ? It’s the EDM which stands for Electronic Distance measurement. We have EDM devices like Total Station, Level, Theodolite etc to handle any kind of MEGA projects very precisely. It’s a technology that uses computerized methods to measure the angle, distance and height. This can’t be achieved by conventional tape