AERIAL MAPPING

Our experience with photogrammetric surveying begins in 1999 with the project “Excavation of the Neolithic settlement Kantou-Koufovounou in Cyprus” using traditional photogrammetric techniques. We continuously evolve following the technological advances and moving from analog to digital photogrammetry.

Aerial mapping with unmanned aerial vehicles is a method that developed rapidly in the 2010s because of:

  • Camera sensors with high resolution.
  • The evolution of computer capability.
  • The increase of disk storage space.
  • The ability to program an autonomous flight using UAVs.

The above advances made this method affordable and appropriate for a wide range of applications, such as mapping archaeological sites, quarries, buildings, coastal lines, residential areas, hazardous or inaccessible areas etc.

 

ADVANTAGES OF AERIAL MAPPING WITH UAVs

  • The ability to choose the time of the shooting, according to the client’s needs.
  • Shooting from low altitude (close range aerial photos).
  • Low cost and short delivery time in contrast to manned aerial vehicles.

 

PROCEDURE FOR ORTHOPHOTO GENERATION

The photogrammetric procedure has both field and office work:

  1. At the field, targets are placed and measured while the best possible flight to obtain the aerial photos is determined according to the area of interest and the need for accuracy.
  2. Next, the aerial photos are processed with the use of photogrammetric software to create an orthophoto map and a 3D model of the area, both georeferenced to the national reference system GGRS’87. An analytical report of the process is produced.

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The aerial photos are combined to produce an orthophoto map

PRODUCTS:

  • Point cloud: points with three-dimensional coordinates.
  • Orthophoto map: an image of the entire area, which can be used to measure true dimensions and enriched with grid, contours, the coastal line etc.
  • Digital elevation model: a 3D depiction of the area, which can be given in many forms, such as contours, triangulated irregular network or coloured terrain maps.