Construction surveying is the process of measuring and mapping the physical characteristics of a construction site and its surroundings, to gather the data needed for the design, planning, and construction of buildings, infrastructure, or other projects.

Construction surveying is typically carried out by a licensed land surveyor, who uses specialized equipment such as total stations, GPS receivers, and laser scanners to measure and record the location and elevation of various features on the construction site, including natural and man-made features such as land contours, existing buildings, utilities, and other site features.

The data collected during construction surveying is used to create topographic maps, site plans, and other types of drawings, which are used by architects, engineers, and contractors in the design and construction process. Construction surveying is important because it ensures that the construction project is built in the right location, to the correct elevation, and according to the intended design.

Construction surveying is also used throughout the construction process to ensure that the project is built to the correct specifications and that all elements of the design are properly aligned and positioned. Surveyors may conduct regular site visits to measure and record the progress of the construction, and may also work with contractors to ensure that the construction is being carried out according to the design plans.