I often come across geodetic markers in my travels. So, I have decided to photograph each one and post them here. This may probably not be interesting to many people, but I figured it would be a fun thing to do each time I encounter a marker. I will also post the coordinates of each marker.
Some basic info about Geodetic markers, also known as survey markers, are physical markers used in surveying to establish precise locations and elevations of points on the Earth’s surface. They are typically made of durable materials such as brass, bronze, or aluminum and are permanently embedded into the ground, attached to structures or affixed to other permanent features.
Geodetic markers can take many different forms, depending on their intended use and the specific location where they are installed. Some common types of geodetic markers include:
- Benchmark: A benchmark is a type of geodetic marker used to establish a precise elevation or height above sea level. It is typically a small metal disk or rod that is permanently installed in the ground or on a building. Benchmarks are used as reference points for mapping, surveying, and construction projects.
- Triangulation station: A triangulation station, also known as a trig station, is a geodetic marker used to establish precise horizontal coordinates on the Earth’s surface. It is typically a tall metal pole with a small platform at the top. Surveyors use a theodolite to measure the angles between the trig station and two or more nearby points to determine the location of the trig station.
- Control point: A control point is a geodetic marker used to establish a precise location for mapping, surveying, and construction projects. It is typically a metal rod or disk that is installed in the ground at a specific location. Control points are used as reference points for measuring distances and angles between other points.
Geodetic markers are used in a variety of applications, including land surveying, construction, mapping, and scientific research. They provide a stable, long-lasting reference point for measuring distances, elevations, and other parameters on the Earth’s surface.