LiDAR-derived data refers to datasets or information that are generated or derived from LiDAR point clouds. For example, LiDAR-derived data can include digital elevation models (DEMs), digital surface models (DSMs), or contour lines, among others. These derived datasets are created by processing the raw LiDAR data to create files that are generally smaller and easier to work with in various software.
In the U.S. high resolution LiDAR is available for approximately 85% of the country, with more being processed all the time. However, LiDAR-derived elevation data is available for the whole country, because it is much easier for the USGS to store and make broadly available online. The LiDAR-derived datasets come in 3m, 6m and 9m resolution. While they aren’t as detailed as LiDAR itself, they’re a great alternative in areas where no other data exists!