DEM, short for Digital Elevation Model, is a digital representation of the Earth’s surface that captures the elevation data of a particular area. This data is collected using remote sensing techniques, such as satellite imagery or LiDAR, and is then processed to create a detailed and accurate 3D model of the terrain. DEMs are used in a variety of applications, including mapping, land surveying, and environmental analysis. They provide valuable information about the topography of a region, allowing for better understanding and management of the land. With its ability to depict the Earth’s surface in high resolution, DEM has become an essential tool in modern cartography and geospatial analysis.