-Point the camera explores the BM (Bench mark) to tie pins, pins, rings, land
.The triangle must set pins in the area it's probably healthy. Used as a reference point, and easy to find out the pins. In the survey, this time using the BM pins drop point. Wooden pins as in the case of camera land land survey pins in a row as if and anchor pins into the zone on a reinforced concrete road. In the case of a piece of land surveying coordinates out pins next time
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