Which are the types of leveling methods used in surveying?

The types of leveling methods used in surveying include barometric, differential, and trigonometric leveling.

Barometric leveling relies on measurements of atmospheric pressure to determine elevation changes over distances. It is an indirect method, suitable for relatively short distances and often used for rough estimates rather than precise measurements.

Differential leveling is a highly precise method where a level is used to measure the difference in height between two points. By establishing a benchmark and taking measurements using a leveling instrument, surveyors can accurately determine elevations.

Trigonometric leveling involves the use of angular measurements taken with a theodolite or total station to compute the heights of points. By measuring the horizontal distance and the angles to the point of interest, surveyors can calculate its elevation relative to a known reference point.

The other options do not represent established methods of leveling in surveying. Geometric, photometric, and electronic methods focus on different principles and tools not specifically categorized as leveling techniques. Similarly, LiDAR, GPS, and total stations are primarily positioning and measurement technologies rather than direct leveling methods. Radial, straight, and circular are terms that could refer to various aspects of geometry or design in surveying but do not classify specific leveling techniques.