DTM, or Digital Terrain Model, is a 3D representation of a terrain's surface created from elevation data. It is commonly used in fields like geography, urban planning, and environmental studies to analyze landforms and manage natural resources. DTM helps visualize topography, making it easier to understand the landscape's features. DTMs are often generated using techniques such as LiDAR (Light Detection and Ranging) or photogrammetry, which capture detailed elevation information. These models can be utilized in various applications, including civil engineering, flood modeling, and land-use planning, providing essential insights for decision-making and project development.