Geodetic control points are stamped with a variety of different markings and symbols to help surveyors identify them in the field.
Center marks, the simple symbols in the middle of a monument cap, indicate whether a monument is a vertical control point marking a precise elevation (commonly referred to as a bench mark), a horizontal control point established at a known latitude and longitude (commonly referred to as a station or mark), a reference marker, or something else entirely.
We’ve highlighted the various types of control points along with their corresponding marks and symbols for handy reference below.
The FENO anchored survey monument system offers an innovative solution for surveyors in need of a small, easy-to-drive, hard-wearing galvanized steel marker. These markers use a unique flaring anchor system for extreme stability without the need for digging or concrete––overcoming a common shortcoming of other drive-in markers.
FENO survey monuments––available in 350mm, 600mm and 1000mm lengths––are comprised of a galvanized steel marker spike and bronze or aluminum monument cap, accompanied by a small installation toolkit.