From the measured values, 3D surfaces are created, from the difference of which the cubic volumes are determined. In addition to the two surveyed surfaces, it is possible to work with one surface and compare it to the projected surface – the difference between the actual surface and the projected surface, or a plane with a given elevation value (used in cases where the 1st condition survey is missing).
- Aerial photogrammetry
We use unmanned aerial vehicles, called drones, for data collection. These are mainly suitable for more precise small to medium scale work or for vertical mapping. We mainly use DJI Phantom 4 Pro and DJI Mavic 2 Pro, which are equipped with a high quality camera with 20 megapixel resolution and high image quality. These instruments can capture images with an image resolution of up to 1cm/pixel.
- Laser Scanning
To determine cubic volumes in confined spaces (e.g. tunnels) or spaces unsuitable for aerial photography, we use the laser scanning method. It provides a very high surface surveying accuracy while maintaining high data acquisition speeds.
- For special purposes, such as measuring small excavation volumes, the MawisPhoto service can be used, see the MawisPhoto Service section.