In 2020, the City of Frankfurt commissioned BSF Swissphoto to carry out an airborne lidar data acquisition with a point density of 8-12 points/m² for the Frankfurt city area including the airport. A total area of 316 km² was scanned. Height models were created on the basis of the collected Lidar data.

A particular challenge was the fact that the high volume of air traffic in Frankfurt did not permit data acquisition during the day. For this reason, data collection was carried out at night.

An important customer requirement was to avoid shadows and invisibility. The flight planning was adapted to this challenge.