There are areas that we cannot see from the ground: roofs, facades, large expanses industrial sites, construction sites. The drone survey is 3D laser scanning Addition. Air and ground data are a single into a single point cloud string them together.
Huge industrial sites, construction sites: where the area to be surveyed can be measured in hectares. The drone captures the overall geometry of the area, the laser scanner is interior details.
Roofs, high facades, towers, tank tops. Without stand or lifting platform, quickly and safely.
Thermal insulation design, condition examination, official documentation. Drone footage captures the roof structure and facade details from a top view.
The greatest value is given by the combination of the two technologies. The drone aerial view provides the outdoor, the laser scanner provides the indoor data. The result is in a unified coordinate system, as a single point cloud.
The drone works with photogrammetry: it builds a 3D point cloud from hundreds or thousands of RGB images. The laser scanner measures directly (LiDAR): determines the spatial coordinates of each point by active radiation.
The two technologies complement each other. Drone: large area, top view, facade, roof structure. Laser Scanner: interior, details, accuracy of a couple of mm, color point cloud and panoramic photos. Together: full outdoor and indoor coverage, in a unified coordinate system.
Why is it better than separately? Unified project management ensures that the two data sources are processed by the same team, in the same coordinate system, with the same quality control. There is no need to retrospectively combine the results of two separate providers.
Drone and laser surveying proceed in a unified workflow, from design to a unified final result.
The whole process consists of five steps:
1. Area survey planning: the flight plan and scanner positions are planned approximately in advance. The goal: maximum coverage, minimum overlap, uniform coordinate system.
2. Drone aerial view: images are taken by automatic or semi-automatic flight. We adjust the flight altitude and image overlap according to the surface and the purpose.
3. Indoor laser scanning: is made in parallel or immediately after the drone survey. The laser scanner captures the interior of the building, areas not visible to the drone.
4. Data processing: we make the point cloud from the drone images by photogrammetry. This is combined with the point cloud generated by the laser scanner into a single coordinate system.
5. Uniform result: the output is a uniform point cloud from the entire area (outdoor and indoor), optionally BIM model and online viewer.
Survey of production sites, logistics centers, warehouse halls. The drone captures the overall picture of the area, the scanner captures the interior of the halls.
Construction progress documentation, state of realization, airdrop timestamp. With a regular drone survey, the entire duration of construction can be documented.
Bridges, towers, railways, grand structures. Where size and accessibility are both challenging.
Facade condition assessment, thermal insulation design, monument documentation. Drone footage captures details of the facade both from above and from the side.
In general, several hectares can be covered, but the exact capacity depends on the flight altitude, the image overlap and the complexity of the terrain. In general, the on-site work requirement for a drone survey does not last more than a few hours.
A photogrammetric point cloud accuracy typically 1-5 cm, depending on the flight altitude and the nature of the terrain. This laser scanner is inferior in accuracy to a couple of millimeters, but it is sufficient for large areas. By combining these two technologies, we obtain accurate and detailed data from the entire area.
The drone survey requires compliance with the current aviation regulations. It is our responsibility to ensure the license and the conditions of flight, but unfortunately these are time consuming and require proper preparation.
Drone and laser point clouds are integrated into a single coordinate system. The result is a single coherent point cloud in which outdoor and indoor data are seamlessly linked.
Drone survey cannot be carried out in windy, rainy or foggy weather. Laser scanning works indoors regardless of the weather. The survey will be adjusted to the weather.
For all requests for proposals, we provide a free, complete offer tailored to the project, contact us with confidence!
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