Surveying Instruments

surveying Instruments is a set of techniques and devices that 
come together to determine a position on the ground
or to locate one or more pointson the ground and
calculate distances and angles between them.
Normally, the points on the ground are intended to set
boundaries for property, create land maps, or create sites
such as building buildings or underground sites. There are many techniques of surveying  Instruments such as:
measuring distances, measuring angles leveling, positioning