Airborne laser scanning is one of the most efficient methods to determine height information and the structure of the earth's surface. In the process, point clouds are created from above with a precision of up to 100 points/m ². The Digital Terrain Model (DTM) generated from this data achieves a position accuracy that deviates from the actual position in the terrain by only a few cm.
A current partner project of GeoFly in cooperation with Trigis GmbH also shows how much potential the combination of airborne laser scanning and mobile laser scanning provides to generate even more points. In this specific case, the project is about the recording of a federal road in an urban area.
While the team of GeoFly GmbH performs the airborne laserscan flight, the data acquisition on the ground is implemented by means of road scanning. The car, which has been specially modified for these purposes, is equipped with a laser scanner and a 360° camera. The objects in the immediate vicinity are constantly captured by both systems during the driving process. The scanner records impressive 2 million points per second, which is equivalent to about 7000 points/m². The result is a high-level detailed point field of the road area. The image data taken by the camera additionally adds colour information for each point, so that the result has an almost realistic appearance.
In the next step, the high qualified team of GeoFly data production is working on the aggregation, processing and georeferencing of all point data from airborne laser scanning and mobile laser scanning. Thereby the point cloud is also the basis for the object vectorization. The result is a highly accurate three-dimensional twin of the road and its immediate surroundings. The fields of application of this snapshot can be absolutely various for the user. The possibilities are from new construction or expansion planning, tree or traffic sign cadastre creation to road condition monitoring. The time and cost savings and the targeted use of financial resources are obvious.
Heavy duty logistics can also benefit from such data collection. By using the collected information in a CAD planning software, route planning can provide important facts before heavy duty transport is carried out: narrow passages or unsuitable bridge underpasses can be excluded from the planning as well as tight curves or constructional barriers.