Tractebel Engineering GmbH has developed an efficient approach for the design and layout of large scale PV power plants. The approach comprises also the preparation of a digital terrain model using drones and photogrammetry software. The video is explaining the complex combination of both and highlights the technological and economical advantages for the customers. In addition, it points out, that this approach is can also be used for further project implementation, in particular for construction supervision. Today, this approach is state-of-the art in engineering of large PV power plants. Furthermore, the video introduces to Tractebel’s fields of activity, market position and capabilities. Thus, the promotion video is today still an important selling support for Tractebel’s services.