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Photogrammetric processing
(Image Processing)
Photogrammetry is the science that studies the shapes, sizes, and positions of objects from images with the aim of creating plans and maps.

Photogrammetric processing (Image Processing) involve the method or process of transforming images obtained through ground-based, aerial, and space imaging into a specified projection and obtaining geometric and semantic information, such as shape, size, distances, spatial position, etc., of objects imaged from their images on space imagery.
Why are Photogrammetric processing (Image Processing) necessary?
Photogrammetry can solve tasks for two main areas of activity: creating maps, plans, and other cartographic products from imagery and solving applied problems in architecture, construction, medicine, forensics, geodesy, etc.

In the field of cartography, photogrammetric processing is used for the production of maps, plans, orthophotoplans, digital elevation models, and also for providing cadastral tasks with necessary spatial data. The scope of applied tasks for photogrammetry continues to expand, including 3D modeling.
Goals and Objectives of Photogrammetric processing (Image Processing):
The goal of photogrammetry is to transform images obtained from ground-based, aerial, and space imagery of the Earth's surface into a specified projection while eliminating distortions caused by the terrain relief, deviations of the imagery axis from the vertical during aerial imagery (tilt angle), atmospheric correction, and other distortions that occur during images. This process is used to create products and solve the following tasks:

  • Compilation of topographic maps and plans;
  • Engineering-topographic plans for surveying purposes;
  • Design and construction of buildings and structures on specific sites or their parts;
  • Archaeological excavations and research;
  • Automation of spatial modeling of objects from space imagery;
  • In military applications: for topographic and special maps, photo documents, densification of control geodetic networks, determination of target and own forces coordinates, trajectory research, flight speed of projectiles and rockets, etc.;
  • Computer games (creation of three-dimensional models of game objects, realistic landscapes)
Advantages of Using Remote Sensing Data in Photogrammetric Measurements:
Remote sensing data from space of ultra-high and high resolution can be obtained more promptly as they may already be available in operator archives, and new images does not require any approvals from competent authorities. The area covered by one space image significantly exceeds the area covered by imagery obtained from an aircraft or UAV.

Aerial remote sensing images acquired from the lens of aerial cameras onboard aircraft or UAVs have high visual informativeness and excellent measurement properties, but they require more time for images, as there is a need for flight approval, movement of the aircraft (UAV with operators) to the imagery area, and higher data cost per square kilometer.
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