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  2. Symmetric mean absolute percentage error - Wikipedia

    en.wikipedia.org/wiki/Symmetric_mean_absolute...

    Provided the data are strictly positive, a better measure of relative accuracy can be obtained based on the log of the accuracy ratio: log(F t / A t) This measure is easier to analyze statistically and has valuable symmetry and unbiasedness properties

  3. Real-time kinematic positioning - Wikipedia

    en.wikipedia.org/wiki/Real-time_kinematic...

    In this case, the base station is located at a known surveyed location, often a benchmark, and the mobile units can then produce a highly accurate map by taking fixes relative to that point. RTK has also found uses in autodrive/autopilot systems, precision farming , machine control systems and similar roles.

  4. Digital elevation model - Wikipedia

    en.wikipedia.org/wiki/Digital_elevation_model

    The quality of a DEM is a measure of how accurate elevation is at each pixel (absolute accuracy) and how accurately is the morphology presented (relative accuracy). Quality assessment of DEM can be performed by comparison of DEMs from different sources. [29] Several factors play an important role for quality of DEM-derived products:

  5. Aerial survey - Wikipedia

    en.wikipedia.org/wiki/Aerial_survey

    It can also refer to a chart or map made by analyzing a region from the air. Aerial survey should be distinguished from satellite imagery technologies because of its better resolution, quality, and resistance to atmospheric conditions that can negatively impact and obscure satellite observation.

  6. Aerial photography - Wikipedia

    en.wikipedia.org/wiki/Aerial_photography

    An example of how aerial photography is used in the field of archaeology is the mapping project done at the site Angkor Borei in Cambodia from 1995 to 1996. Using aerial photography, archaeologists were able to identify archaeological features, including 112 water features (reservoirs, artificially constructed pools and natural ponds) within ...

  7. Unmanned aerial vehicle - Wikipedia

    en.wikipedia.org/wiki/Unmanned_aerial_vehicle

    Small drones avoid the need for precise coordination between pilot and cameraman, with the same person taking on both roles. Big drones with professional cine cameras usually have a drone pilot and a camera operator who controls camera angle and lens. For example, the AERIGON cinema drone, used in film production, is operated by two people.

  8. Positioning system - Wikipedia

    en.wikipedia.org/wiki/Positioning_system

    A positioning system is a system for determining the position of an object in space. [1] Positioning system technologies exist ranging from interplanetary coverage with meter accuracy to workspace and laboratory coverage with sub-millimeter accuracy.

  9. Glossary of project management - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_project_management

    Project management office: The Project management office in a business or professional enterprise is the department or group that defines and maintains the standards of process, generally related to project management, within the organization. The PMO strives to standardize and introduce economies of repetition in the execution of projects.

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