Developing a good, high-resolution 3-D map is a long, tedious and expensive process: a vehicle scans the surrounding environment from ground level up to the top of roofs or trees, while an aerial perspective is added using a drone. But a new approach, in which the terrestrial vehicle and drone are operated in tandem, has now been developed as part of a European project called mapKITE. EPFL researchers are involved in the consortium, which is funded by the H2020 program, and have designed some of the key components of this breakthrough technology. These include technical features – such as the target – that allow the drone to ‘latch’ virtually onto the vehicle.