2016 - 2019 USGS Lidar: Alabama 25 County Point Cloud files with Vertical Datum North American Vertical Datum of 1988 (NAVD88) using GEOID18

Below are links to the files that make up the 2016 - 2019 USGS Lidar: Alabama 25 County dataset.

Vertical datumNorth American Vertical Datum of 1988 (NAVD88) using GEOID18 in meters
Horizontal projection/datumNAD83(2011) / UTM zone 16N

Informational files are listed first (such as geospatial indices, metadata, and so on), followed by the files. To download in bulk, it is suggested you use a download manager such as wget, uget, or filezilla for example. The geospatial index file in shapefile format also 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 (add to cart, the link to bulk download will take you here).

The files are in LAZ format, a lossless compressed version of the ASPRS LAS format. The compression and decompression can be done with the free and open source 'laszip' program available at https://rapidlasso.de/laszip/ (source at https://github.com/LASzip/LASzip). This is not the same as the more general zip format. You may also want to try the uGet program using the list of URLs in file urllist_al2017_25county_m9174.txt. Several posts on the GeoZone blog provide help with downloading, including:

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=2 https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9174/index.html/
This will give you the directory structure starting with geoid18. Modify the --cut-dirs=2 argument to modify the start directory (e.g. --cut-dirs=4 will start at $missionid). 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:


If you have problems with wget that look like an authorization or certificate issue, you may need to add the option "--no-check-certificate". Windows users may want to install the Windows Subsystem for Linux to get a current wget.

The total size to download all the files is 1.5T. There are 23054 LAZ files and the summary class table is:

Class NumberClass NamePoints
0Never Classified6
1Unclassified183583304359
2Ground63101865189
3Low Vegetation651
6Building58847
7Low Point (noise)201266263
9Water519013164
10Ignored Ground (near breakline)6203607
11Road Surface8142921
14Wire-Conductor3761
17Bridge Deck3948191
18High Noise930993

This dataset has 18638 points in additional unexpected classes that may be misclassified.

Cloud Access

This data is in an AWS S3 bucket at s3://noaa-nos-coastal-lidar-pds/laz/geoid18/9174.

Meta Information

Tile Index: tileindex_al2017_25county_m9174.zip (Shapefile)
Tile Index: tileindex_al2017_25county_m9174.gpkg (Geopackage)
Metadata: metadata_al2017_25county.xml
Metadata: metadata_al2017_25countyforHumans.html
XYZ range table: minmax_al2017_25county_m9174.csv
URL List: urllist_al2017_25county_m9174.txt

Supplemental Info

Files

16113_Block_1_Aerial_Lidar_Report.pdf
16113_Block_2_Aerial_Lidar_Report.pdf
16113_Block_4_Aerial_Lidar_Report.pdf
16113_Block_5_Aerial_Lidar_Report.pdf
al2017_25county_m9174.kmz

Spatial Temporal Asset Catalog (STAC)

collection.json (See collection in STAC Browser)
noaa_copc_item_collection_m9174.json

Other Related Information

Breaklines

Links to Related Datasets

Title Bulk Download Data Access Viewer ID #
2016 - 2019 USGS Lidar DEM: Alabama 25 Countybulk linkDAV13777

Point Cloud Directories

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This page is owned by the NOAA Office for Coastal Management and was created by an automated script on 2026-04-18 22:46:05.748214.
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