What are the building measuring instruments?
TheodoliteAn instrument for measuring horizontal angles and vertical angles. It consists of a telescope, a horizontal dial, a vertical plate and a base. The reading device is divided into vernier theodolite, optical theodolite and electronic (automatic display) theodolite. Theodolite is widely used in control, topography and construction lofting, and other measurements. China theodolite series are: DJ07, DJ1, DJ2, DJ6, DJ15, DJ60 six models ("DJ") "geodetic theodolite", "07, 1, 2",...... "This is a type of instrument in seconds indicating a horizontal error in the middle direction.". When the theodolite is attached with special fittings, it can be composed of laser theodolite, slope theodolite and so on. In addition, there are dedicated gyro theodolite, mine theodolite, photographic theodolite, and so on.
LevelAn instrument for measuring the difference between two points. It consists of telescope, level (or compensator) and pedestal. According to the structure, it can be divided into fixed mirror level, rotating mirror level, micro tilting level instrument and automatic Anping level. Level is widely used in control, topography and construction, lofting and other measurement work. There are a series of standards for China's level: DS05, DS1, DS3, DS10, DS20 and other models ("DS") "geodetic level", "05, 1, 3",...... "The accidental mean error in the middle of the elevation difference per kilometer indicated by the instrument in millimeters.". When a special accessory is attached to the level, a laser level can be formed.
Plate apparatusThe main instrument for manual mapping of large scale topographic maps on the ground. Composed of alidades, plate and the support member. In alidades additional electromagnetic wave distance measuring device, can make the operation more convenient and rapid.
