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Ground Control Points (GCPs) are defined as the points on the surface of the earth which help to georeference raster data such as satellite, aerial, or drone imagery.

Volumetric surveys are topographical surveys that accurately quantify the volume of material removed from or placed at a location.

Point clouds are the simplest form of 3D Model. They are the individual points plotted in 3D space.

Contouring, in surveying, is the determination of elevation of various points on the ground.

Surveying is a process of determining or identifying different features of a land area. It helps in planning or mapping an area.