Due to the receding permafrost, rock faces and slopes are becoming more and more brittle and have to be secured more frequently where there is primarily danger to people. This may be the case along roads, railroad lines, but also in the immediate vicinity of residential areas. A survey of the actual condition without the risk of walking on the walls for surveying purposes helps enormously. Furthermore, accurate simulations can be carried out by geologists or technical offices and 3D surfaces can be calculated. Anchor points for the fastening can be localized before the start of the securing work. The increase in work safety in advance minimizes the risk and detailed planning in advance saves time and costs.