This lecture covers various geomatics applications, including mapping techniques used in architecture, monitoring of instability zones for natural hazards, and the use of laser scanning and aerial photography for 3D modeling. The instructor showcases examples from an ancient theater site, demonstrating the combination of different acquisition technologies to model and track the evolution of objects over time. Additionally, the lecture delves into the use of hyperspectral imaging for vegetation analysis and monitoring unstable mountain areas, emphasizing the importance of precise measurements and monitoring systems in ensuring safety and preventing disasters.