Share
Get Access to:
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
For any set up of level, the height of instrument is the elevation of plane of sight (line of sight) with respect to the assumed datum (Or reduce level of plane of collimation). It does not mean the height of the telescope above the ground where the level stands.
In surveying, the height of instrument (HI) is the vertical distance measured from a reference level to the horizontal axis of the instrument when it is set up for observation. It is a critical value used in computing distances and elevations from observations. HI is typically determined using a spirit level or a laser. HI is usually expressed in meters or feet.