DEM stands for ______________________.Group of answer choicesdigital earth modeldigital elevation modeldigital euclidean modeldigital eclipse model

The correct answer is "digital elevation model."

Digital Elevation Models (DEMs) are a widely used representation of terrain relief that captures the elevation data for the Earth's surface. They provide critical information for various applications, including topographic mapping, watershed hydrology, urban planning, and environmental monitoring. DEMs are typically created from various sources, such as satellite radar data or lidar (Light Detection and Ranging) systems. The elevation data in a DEM is usually represented in a grid format where each cell in the grid contains an elevation value. This digital representation enables sophisticated analyses and visualizations, enabling researchers and planners to understand the characteristics of the landscape, identify potential hazards, and facilitate decision-making processes.