Surveyor's Magnetic Compass

A Surveyor's Magnetic Compass is a type of compass specifically designed for surveying and mapping purposes. It is used by surveyors to determine the direction and orientation of a specific point or feature on the Earth's surface.

Here are some key features and functions of a Surveyor's Magnetic Compass:

1. Magnetic Needle: The compass is equipped with a magnetic needle that aligns itself with the Earth's magnetic field. This allows surveyors to determine the magnetic north direction.

2. Graduated Circle: The compass has a graduated circle or azimuth ring around the magnetic needle. This circle is marked with degrees or azimuths, allowing surveyors to measure angles and bearings accurately.

3. Sight: The compass is typically equipped with a sight or a sighting device, such as a peep sight or a prismatic compass. This allows surveyors to align the compass with a specific target or point of interest.

4. Tripod Mount: Some Surveyor's Magnetic Compasses may have a tripod mount, which allows for stable and precise measurements.

5. Declination Adjustment: Many modern compasses have a declination adjustment feature. This allows surveyors to correct for the difference between magnetic north and true north, which varies depending on the location.

6. Accessories: Surveyor's Magnetic Compasses may come with additional accessories such as a carrying case, a plumb bob, or a tripod.

These compasses are essential tools for surveyors, as they provide accurate measurements of angles and bearings, which are crucial for mapping and land surveying activities.