Tapes and chains
The simplest of measuring instruments is the direct reading measuring tape, chain or staff. For surveyors the chain has long been the standard instrument untill being replaced by the tape some decades ago. The measurement distance of tapes and chains seldom exceeds 20 to 30 meters and for longer distances multiple measurements have to be made. When done correctly these can be very accurate. For home improvement the classic (metal) tape is used.
