Some construction projects on the site, we will often see a number of technical personnel strapped measurements during a single instrument, the instrument they use is the theodolite. Theodolite initial invention has a close relationship with the sailing. In the 15th and 16th Centuries, Britain, France and some other countries, because of sailing and war, the need to draw a variety of maps, charts. The earliest mapping using a triangulation method, is based on observations of two known points, find the location of the point distant third, but the absence of a suitable instrument, resulting in a limited means of angle measurement accuracy is not high electric theodolite resettlement method thus draw topographic map accuracy is not high theodolite 1) tripod tune into equal length and height for the operator, the instrument on a tripod, the instrument on a tripod base surface and parallel to the top surface. 2) the instrument placed on dance station, currently estimated roughly pair after a steady-foot step and adjust the optical plummet eyepiece (see the cross hairs) and objective (see the station), with both hands put a frame around the feet, side to side, Grossly coincides with the intersection of the crosshairs allows the station, put stability and real step foot frame. 3) telescopic tripod legs to level the circular level 4) the vial given two parallel flat metal spiral theodolite, leveling vial. 5) 90-degree pan theodolite alidade sales, with a third screw leveling vial. 6) Check the optical plummet, if a small amount of deviation, can open a connection to spiral pan base theodolite, making precise alignment, tighten the screw connection, and then check the level bubble in the middle. Some construction projects on the site, we will often see a number of technical personnel strapped measurements during a single instrument, the instrument they use is the theodolite. Theodolite initial invention has a close relationship with the sailing. In the 15th and 16th Centuries, Britain, France and some other countries, because of sailing and war, the need to draw a variety of maps, charts. The earliest mapping using a triangulation method, is based on observations of two known points, find the location of the point distant third, but the absence of a suitable instrument, resulting in a limited angle measurement means, accuracy is not high, by This draw is not high precision topographic map using theodolite, theodolite, Jinke instrumentation provided by Qingdao Branch of the Instrument Co., Ltd. Qingdao Branch of the Instrument Co., Ltd. (www.qdjk17.com) strong, credible, in Qingdao, Shandong analytical instruments industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Branch of the Instrument and you hand in hand into the brilliant, for a better future!