Switzerland – Engineering-related scientific and technical services – ALS (Airborne Laser Scanning) und Luftbildaufnahmen 2027-2030

The transmission network of Swissgrid, with approximately 3,800 km of line length, is fully digitally recorded in the line calculation program PLS-CADD (software for modelling and calculating overhead lines). The initial data collection was carried out in 2017–2018 using LiDAR survey flights. Swissgrid updates the LiDAR data and aerial photographs periodically to detect changes in the route perimeter, assess operational risks regarding distances between lines and the environment, and update new constructions and line modifications in the dataset. The survey flights (LiDAR and aerial photographs) are to be carried out by the contractor in the perimeters defined by Swissgrid and in accordance with the technical specifications of this tender. The resulting data serve as the basis for subsequent evaluations in PLS-CADD. The modelling and analysis in PLS-CADD are not part of this contract.