A Digital Elevation Model (DEM) is a 3D representation of a terrain's surface created from elevation data. It provides a grid of elevation points, allowing users to visualize and analyze the landscape's features, such as mountains, valleys, and plains. DEMs are commonly used in geographic information systems (GIS) for various applications, including urban planning, environmental studies, and disaster management. DEMs can be generated from different sources, including satellite imagery, aerial surveys, and ground-based measurements. They come in various resolutions, with higher resolutions offering more detailed terrain information. This data is essential for tasks like hydrological modeling, landscape visualization, and infrastructure development.