TP – 1305 An Introduction to Survey Control Monuments for Professional Engineers

Description

The most effective precaution that can be taken to assure a mark’s stability and survival is to choose an appropriate location so it is imperative that good judgment be exercised. Since there are a wide variety of possible situations that may be encountered when setting a mark, it is virtually impossible to address them all in this discussion. Therefore, the ultimate selection of a site is necessarily left to the discretion of the mark setter. The resultant accuracy of any survey will be determined in part by the stability of the marks. A mark setter exercising good judgment is defined as an individual who thoroughly evaluates the security, utility, stability, environment, and safety of the mark and its site before establishing the marks. With the increased use of Global Navigation Satellite Systems (GNSS), a location that is both protected and that provides a clear view of the sky is desired but may be difficult to find. The most important site selection parameters are discussed in the following technical paper.