Terrain modeling is the process of creating a digital representation of the Earth's surface. This involves using various techniques to capture the shape, elevation, and features of landscapes, such as mountains, valleys, and rivers. Terrain models can be generated from data collected through methods like satellite imagery, aerial photography, and LiDAR (Light Detection and Ranging). These models are used in various fields, including geography, urban planning, and environmental science. They help researchers and planners visualize terrain for purposes like assessing land use, predicting natural disasters, and designing infrastructure. By understanding the terrain, better decisions can be made for development and conservation.