Aerial photogrammetry, a modern and efficient measurement method

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New technologies make the present and the future “sound good” in terms of cadastre and topography. Today, companies operating in this sector, for example
for example, have the latest generation of devices, which can be used to take centimetre-by-centimetre measurements, which are very useful when studying land or buildings.

Individuals, legal entities, organisations, associations or public institutions can turn to Ecad, depending on their needs, which provides them with several top services: UAV photogrammetry, 3D scanning of buildings, land measurements, topographic surveys, digitisation of monuments, surveys or facade plans, all carried out by experienced professionals using new generation equipment.

What is UAV Photogrammetric Technology

Because the pace of construction is increasingly fast in Romania, Ecad’s specialists obtain the necessary data quickly and efficiently using aerial photogrammetry for topographical surveys. Basically, by means of special UAVs (Unnamed Aerial Vehicles), all the information needed is obtained, reducing the costs, the number of people involved and the time usually allocated to such an analysis.

UAV technology can be used to provide the following services: topographical plans with contour lines, cadastral surveys, volume calculations, checking the integrity of installations and machinery located in difficult-to-access areas, forestry and agricultural monitoring, site monitoring, 3D models, 3D reconstructions, study of heritage monuments or archaeological sites, as well as real estate photography, perimeter surveillance, etc.

What equipment and software Ecad specialists use in UAV photogrammetry

Ecad’s UAVs help measure large, hard-to-reach areas without contact, but with top-notch accuracy. In Time of Flight, photographs are taken, which together with laser scans help to process a 3D point cloud, which is relevant for obtaining very precise data: georeferenced orthophotos. CAD, GIS or BIM software can then be used to create topographical maps, as-built plans or site plans.

Ecad delivers various point cloud-based results in a predetermined output format:

  • orthophotographs from certain detection angles – bridges, facades, towers, etc.;
  • georeferenced orthophotos of the earth in different resolutions and scales;
  • 3D modelling and 2D drawings;
  • digital terrain models;
  • target or actual comparisons to verify and/or determine consumption;
  • point clouds through 3D measurements or 3D documentation;
  • determination of mass and volume;
  • filling volume calculation;
  • volume elimination calculation and volume application;
  • measuring the progress of a project;
  • slope movement monitoring

The point cloud helps to represent surface structures as well as complex objects by a number of individual points in a three-dimensional coordinate system. The scan points that are recorded by Ecad UAVs using photogrammetry or a LiDAR scanner are transformed into a dense point cloud after processing. From this point cloud, 2D maps, orthophotos, 3D terrain models can be derived as additional results.

In carrying out the activities for which they are required, the Cadastre and Surveying Firm Ecad use a Geo Slam Locate (which captures and models complex data 10 times faster than traditional measurements), Geomax (full-spectrum satellite signals with full connectivity and unique functionality, allowing measurement of points that would be impossible to measure by traditional methods) and BricsCAD software (a solution designed for architects, contractors and engineers to improve workflow and create accurate building information models in record time).