3D terrain models

3D terrain models are digital representations of Earth's surface that depict landforms like mountains, valleys, and plains in three dimensions. They use data from sources such as satellite images, aerial surveys, and geographic information systems to create detailed, lifelike visuals. These models help in planning construction, environmental management, and navigation by providing accurate spatial information. Essentially, they are virtual maps that let us view and analyze terrains from various angles and perspectives, offering a deeper understanding of the landscape's shape and features without physically being there.