The 3D Elevation Program (3DEP) utilizes which technology to capture elevation data?

The 3D Elevation Program (3DEP) primarily utilizes LiDAR technology to capture elevation data. LiDAR, which stands for Light Detection and Ranging, is a remote sensing method that uses laser light to measure distances to the Earth’s surface. This technology allows for the collection of high-resolution elevation data, mapping the terrain's features in great detail, including trees, buildings, and other structures.

LiDAR is particularly advantageous due to its ability to penetrate vegetative cover and produce precise topographic maps that are essential for various applications, such as flood modeling, forest management, and urban planning. The data generated from LiDAR surveys can create Digital Elevation Models (DEMs) and is critical for environmental analysis and infrastructure development.

Other methods listed, such as radar, satellite imagery, and aerial photography, have their uses in capturing geographic information, but they do not provide the same level of detail or precision in elevation mapping as LiDAR does. While radar can measure distances and are used in some elevation applications, it does not match LiDAR's effectiveness in capturing high-resolution elevation data in various environments. Satellite imagery is effective for surface mapping but lacks the vertical accuracy needed for detailed elevation modeling. Aerial photography can provide some elevation context but is