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Lidar (/ ˈ l aɪ d ɑːr /, also LIDAR, LiDAR or LADAR, an acronym of "light detection and ranging" [1] or "laser imaging, detection, and ranging" [2]) is a method for determining ranges by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the receiver. Lidar may operate in a fixed ...
Typical data collected includes aerial photography, Lidar, remote sensing (using various visible and invisible bands of the electromagnetic spectrum, such as infrared, gamma, or ultraviolet) and geophysical data (such as aeromagnetic surveys and gravity measurements). It can also refer to a chart or map made by analyzing a region from the air.
Low altitude aerial photograph for use in photogrammetry. Location: Three Arch Bay, Laguna Beach, California. Photogrammetry is the science and technology of obtaining reliable information about physical objects and the environment through the process of recording, measuring and interpreting photographic images and patterns of electromagnetic radiant imagery and other phenomena.
Stereo photogrammetry or photogrammetry based on a block of overlapped images is the primary approach for 3D mapping and object reconstruction using 2D images. Close-range photogrammetry has also matured to the level where cameras or digital cameras can be used to capture the close-look images of objects, e.g., buildings, and reconstruct them ...
OpenDroneMap is an open source photogrammetry toolkit to process aerial imagery (usually from a drone) into maps and 3D models. [3] [4] [5] The software is hosted and distributed freely on GitHub. [6] OpenDroneMap has been integrated within American Red Cross's in-field Portable OpenStreetMap system. [7]
Technological advancements such as LiDAR (Light Detection and Ranging) and photogrammetry have further enhanced aerial archaeology. LiDAR, in particular, is capable of penetrating dense vegetation to reveal features hidden beneath forest canopies, making it an invaluable tool for studying heavily forested regions.
Lidar (light radar) has also complemented photogrammetry for gathering elevation data. Lidar uses a laser pulse directed at features and detects the amount of time between when the pulse is emitted and when it is detected to determine the difference in elevations.
IMAGINE Photogrammetry: Proprietary: Microsoft Windows: Standalone Semi-automatic Yes, multiple images Aerial, satellite, UAS Images 2009 Hexagon Geospatial Unknown Metashape (former PhotoScan) Proprietary: Linux, macOS, Microsoft Windows: Standalone Yes Yes, multiple images, cluster distributed processing Aerial, close-range, UAS, satellite
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related to: mapping drone lidar vs photogrammetry light