2021 NOAA NGS Topobathy Lidar: Niihau, Hawaii Point Cloud files with Orthometric Vertical Datum GPS-derived orthometric height via GEOID model using GEOID12B

Below are links to the files that make up the 2021 NOAA NGS Topobathy Lidar: Niihau, Hawaii dataset in an orthometric vertical datum GPS-derived orthometric height via GEOID model using GEOID12B. The files containing geospatial indices, metadata, etc., are listed first, 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 or LAZ fmt will take you here).

The data are all in geographic coordinates using the North American Datum of 1983 (NAD83). The version of the NAD83 datum may vary slightly, but all are one of the updated realizations such as the High Accuracy Reference Network (HARN), Continuously Operating Reference System of 1996 (CORS96), or National Spatial Reference System of 2007 (NSRS2007), and not the original NAD83(86). This may not be evident in the metadata. Vertical units are meters and all have been converted from NAD83 ellipsoid heights to orthometric GPS-derived orthometric height via GEOID model heights using GEOID12B.

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 urllist10192.txt. Several posts on the GeoZone blog provide help with downloading, including:

The total size to download all the files is 67G. There are 1949 LAZ files and the summary class table is:

Class Number	Class Name	Points
1	Unclassified	1239212498
2	Ground	920095255
7	Low Point (noise)	7082
9	Water	1404126265
18	High Noise	373
40	Bathymetric point	1074831974
41	Water surface	1750304690
42	Derived water surface	4203445648

Georeferencing Note

Georeferencing found in files: Projected NAD83(PA11); MSL height

Cloud Access

This data is now in an AWS S3 bucket at s3://noaa-nos-coastal-lidar-pds/laz/geoid12b/10192.

Meta Info

Tile Index: tileindex.zip (Shapefile)
2021_ngs_niihau_topobathy_index.gpkg (GeoPackage)
Metadata: 2021_ngs_niihau_topobathy_metadata.xml
Metadata: 2021_ngs_niihau_topobathy_metadata.html
XYZ range table: 2021_ngs_niihau_topobathy_minmax.csv
URL List: urllist10192.txt is a list of all the URLs for batch downloading.

STAC catalogs/collections

stac/noaa_copc_item_collection_m10192.json

Supplemental Info

supplemental/extent_ngs_niihau_2021_m10192.kmz
supplemental/index.html

Point Clouds

This page is owned by the NOAA Office for Coastal Management and was created by an automated script on Tue Nov 5 10:00:23 PM EST 2024.
Contact Us