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.
Note: This guide covers the center marks commonly used today, however, it is by no means an exhaustive list of all center marks known to surveyors. The following resources offer more detailed information about historical survey markings their uses in the field:
All of the center markings covered in this guide can be stamped onto Berntsen’s survey monuments. Learn more and browse our selection of monuments here.
Horizontal control mark
Gravity control mark
Vertical control marks (bench marks)
Topographic station mark
Browse our product pages to see Berntsen’s full line of survey monuments and related products or request a catalog. Have questions? Contact our team today.
Berntsen International, Inc. has been "Marking the Infrastructure of the World" since its founding as Berntsen Cast Products in 1972 by Phillip Peterson and Peter Berntsen. The company garnered early success by manufacturing and selling top quality monuments to mark the nation’s boundaries. Investments in product and process innovation drive company growth and are a core reason why Berntsen is recognized as a premier provider of the best markers in the world. Today Berntsen has a product line of more than 1,000 markers and those products mark infrastructure and boundaries in over 100 countries. Read More...
For sales and customer service inquiries please contact us between the hours of 8:00am and 4:30pm Monday through Friday (Central Standard Time).