Photogrammetry & Surveying
The advantages of photogrammetry and surveying with drones make it possible to design projects more efficiently and precisely. State-of-the-art drone technology is used to create detailed 3D models, orthophotos and digital terrain models (DTM) for construction projects, land surveys and inspections. Drones offer fast, cost-effective and safe surveying of hard-to-reach areas, making them ideal for engineers, architects and construction companies. By using drone-based surveying and photogrammetry, planning processes can be optimized and informed decisions can be made. Below are three steps on how we implement a photogrammetry/drone survey.
Step 1: Creation of high-resolution image material using a drone
In the first step, a drone with a high-resolution camera is used to create detailed aerial images of the area to be surveyed - for example, a roof or a larger area. The drone flies along a predetermined flight path and takes a large number of images from different angles. These images are often taken overlapping to ensure that sufficient data is available for subsequent 3D modeling. It is important to calibrate the camera correctly and plan the flight precisely to ensure complete and accurate coverage of the area. GPS data is recorded in parallel to capture the exact position of each image.
Step 2: Creating a 3D model using photogrammetry
In the second step, the captured images are processed using photogrammetry software. Photogrammetry is a technique in which a detailed 3D model of the scanned area is created from the overlapping photos taken by the drone. The software recognizes similarities in the images and uses this information to reconstruct spatial data. This generates point clouds, surface structures and height information. The result is a precise digital 3D model that reflects the exact geometry of the scanned environment. These models serve as a basis for further analysis or as a starting point for the creation of technical drawings.
Step 3: Drawing the DWG plan
In the final step, the generated 3D model is imported into common CAD software such as AutoCAD or similar programs. Exact 2D plans, e.g. in DWG format, can now be created based on the spatial data of the model. These plans often serve as architectural or engineering drawings that are used for construction projects, renovations or surveying purposes. During the creation of the plan, contour lines, areas, dimensions and other relevant information are incorporated to provide accurate and ready-to-use documentation of the scanned object.