3D Mapping
Drones are also able to capture images in such a way that they can be processed to produce several 3D outputs all of which are provided in the correct scale and geolocation.
Contour lines and 3D topography.
Point Clouds that can be used as a source of data and dimensions for existing conditions geometry in a 3D modeling software (E.g. Revit).
3D model (textured mesh) that can be used in visualization efforts to show context around the project.
Facade surveys, a technique that allows photographing and producing a digital copy of a building elevation with great detail.