What is air photogrammetry?

Aviation photogrammetry is a technique for creating two -dimensional (2D) or three -dimensional (3D) models from aerial photographs that are images of the Earth from the highest point, usually from the aircraft. These photos are then transformed into cartographers. Aviation photogrammetry usually requires photographs of two or more angles of the same area to map a picture and may or may not include computer software.

For the large part, aerial photogrammetry is used to create topographic maps. These maps can be either 2D or recently 3D computer models of terrain. The resulting maps and models can be useful in analyzing small and large geographical areas. These maps can be used as a basis for or in conjunction with data on the geographical information system (GIS). It is commonly used in the development of architecture and soil. In addition, these mapping techniques can be used in terrain tal, such as survey or deforestation research, city planning or even in film productionwhose. If the image is taken from a low flight path, the camera is usually mounted on a small, remote control aircraft. Flight restrictions in many areas forbid to fly the crew too low above residential and trade areas.

The flight pattern of the aircraft will usually meander back and forth by the area because the camera will record pictures. This formula is intended to allow for photographing each area from multiple angles. The process of air photogrammetry almost always requires photographic data from multiple angles.

Photogrammetrists need more angles to determine the relative positions of objects in the photographs. This process is insulated by the same points on each photo and the triangulation of their positions in relation to each other. This process is usually done using a stereo-plotter, specialized computer software or both. Stereo-programs allow the cartographer to see two photos at the same time to better compare pointsinterest.

In many cases, photographic data may not be sufficient to determine the complete landscape image. This can be particularly true when creating a 3D landscape model. Therefore, air photogramtry often combines other types of data with photographs using tools such as light and range detection (Lidar), laser scanners or white light digitizers.