Downloading Lidar Data When downloading a lidar data set, users will find that each directory contains the LAZ files for the data set, a shapefile providing the tile scheme (zipped as tileindex.zip), and a metadata record (2000_SummerEC_metadata.xml). File 2000_SummerEC_minmax.csv contains the xyz ranges for each LAZ file. LAZ files are a compressed version of the standard LAS files (format available at http://asprs.org/Committee-General/LASer-LAS-File-Format-Exchange-Activities.html) and can be uncompressed using the free LASzip software available at www.laszip.org. Directories may contain over a thousand files, so users will generally want a mechanism that allows downloading in bulk. One option is to use Wget (freely available at http://www.gnu.org/software/wget/), a command line utility that is very flexible and works on multiple platforms. An example usage of Wget is given below. Other options are available, and a Web search for "download manager" should provide some useful results. Data in ITRF ellipsoid heights were converted to NAD83 ellipsoid heights prior to the application of a GEOID model. If you would rather get a subset of the data instead of the full dataset or need custom processing, you can do so through the Digital Coast Data Access Viewer (https://www.coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10). Example using WGET To download all the .laz files in https://coast.noaa.gov/htdata/lidar1_z/geoid18/data/10, execute the following wget command in a command or terminal window: wget -nd -r -A.laz https://coast.noaa.gov/htdata/lidar1_z/geoid18/data/10 For More Information NOAA Office for Coastal Management (843) 740-1200 coastal.info@noaa.gov