Inventory of loose material stockpiles in open areas is an ideal task for photogrammetry and our unmanned aerial vehicles (UAVs). What should you do when the client's stockpiles are located inside buildings or under roofs? Use laser scanning, which ensures that both the format of the final results and the accuracy of the obtained measurements will be at the highest achievable level. With a fast scanner like the RIEGL VZ 400I, we can inventory stockpiles under roofs just as quickly as using drones and photogrammetry.