Below are links to the files that make up the NOAA NCEI Continuously Updated Digital Elevation Model (CUDEM) - Third Arc-Second Resolution Bathymetric-Topographic Tiles dataset. The files containing geospatial indices, metadata, etc., are listed first, followed by the files. To download in bulk, it is suggested you use a program such as wget (example below), uget, or your favorite download manager. The geospatial index file in shapefile format has a URL attribute that some GIS programs can use to download files. You can also subset the data, make derived products, and change projection, datum, etc., using the Digital Coast Data Access Viewer (use the add to cart, the link to bulk download will take you here).
Example to download entire data set using wget (note: sufficiently new and trusted pre-compiled Windows versions can be hard to find):
wget -np -r -nH -L --cut-dirs=1 https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/dem//8580/NCEI_third_Topobathy_2014/index.html
This will give you the directory structure starting with NCEI_third_Topobathy_2014. Wget is a command-line program and the output will
be to the directory you run it in. More options and information can be found at https://www.gnu.org/software/wget/manual/wget.html.
The other options in the example mean:
You can also use the uGet program with the list of URLs in file urllist8580.txt. More information on using uGet is in the Bulk Lidar Download GeoZone blog post.
The total size to download all the files is 9.3G.
Metadata: NOAA NCEI Metadata
Metadata: thirdarcsec_DEM_m8580_met.xml
Other HTML: thirdarcsec_DEM_m8580_met_forHumans.html
Tile Index: tileindex_NCEI_third_Topobathy_2014.zip
URL list: urllist8580.txt
Website Owner: NOAA Office for Coastal Management; Last Updated: 2025-12-23 13:35:12.056499