73689 Data Set Published / External 59025 NGS Lidar Project Completed 2024-10 These data were collected by Woolpert using a Leica Hawkeye4X system. Data for Nihoa and French Frigate Shoals were acquired from February 7, 2021 through July 27, 2023. The data includes topobathy data in an LAS 1.4 format file classified as unclassified (1), ground (2), low noise (7), topo water surface (9), high noise (18), bathymetric point (40), bathymetric water surface (41), synthetic derived water surface (42), submerged object (43), International Hydrographic Organization (IHO) S-57 object (44), submerged aquatic vegetation (64), and bathymetric bottom temporal changes (65) in accordance with the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards. This data set may also include lidar intensity values and encoded RGB image values. This data was collected to provide topographic/bathymetric lidar data, digital imagery, and digital shoreline for National Oceanic and Atmospheric Administration (NOAA) nautical charts and other uses. Data include all lidar returns. Outliers or false returns (e.g., returns from birds, atmospheric particles, and/or system noise) may be present in the data. An automated ground classification algorithm was used to determine bare earth point classification. It should be noted that not all returns were correctly classified; therefore the user should examine for acceptability. Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY > COASTAL BATHYMETRY Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION Theme ISO 19115 Topic Category elevation Spatial Global Change Master Directory (GCMD) Location Keywords OCEAN > PACIFIC OCEAN > CENTRAL PACIFIC OCEAN > HAWAIIAN ISLANDS Instrument Global Change Master Directory (GCMD) Instrument Keywords LIDAR > Light Detection and Ranging Platform Global Change Master Directory (GCMD) Platform Keywords Airplane > Airplane Office for Coastal Management Charleston SC Data Set Elevation None Planned Model (digital) Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the National Geodetic Survey, the Office for Coastal Management, or its partners. We request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these data in a report, publication, or presentation. 73690 Published / External Completed Other Yes Class table describing the class numbers used in the lidar data file. Each point in the lidar file has a class associated. 1 1 - Unclassified Point class number No No Active Unclassified point 2 2- Ground Point class number No No Active Ground Point 3 7 - Low Point (Noise) Point class number No No Active Low Point (Noise) 4 9 - Topo Water Surface Point class number No No Active Water Point 5 18 - High Noise Point class number No No Active Refracted high water point 6 40 - Bathymetric Point Point class number No No Active point classified as bathymetric ground. 7 41 - Bathymetric Water Surface Point class number No No Active Point classified as water surface. 8 42 - Derived Water Surface Point class number No No Active Derived water surface (synthetic water surface location used in computing refraction at water surface). 9 43 - Submerged Object Point class number No No Active Submerged object, not otherwise specified (e.g., wreck, rock, submerged piling) 10 44-International Hydrographic Organization (IHO) S-57 Object Point class number No No Active International Hydrographic Organization (IHO) S-57 Object 11 64 - Submerged Aquatic Vegetation Point class number No No Active Point classified as submerged vegetation. 12 65-Bathymetric Bottom Temporal Changes Point class number No No Active Bathymetric Bottom Temporal Changes Data Steward 2024 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2024 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Metadata Contact 2024 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Originator 2024 Organization National Geodetic Survey NGS https://ror.org/02f762h70 1315 East-West Hwy Silver Spring MD 20910 https://geodesy.noaa.gov/ Ground Condition -167.01 -161.66 24.29 22.89 Range 2021-02-07 2021-10-12 -167.23 -167.01 24.47 24.18 Range 2021-03-06 2023-07-24 -166.4 -165.99 23.91 23.59 Range 2022-04-11 2023-07-27 Yes Geographic 3D EPSG:6321 NAD83(PA11) NAD83 (National Spatial Reference System PA11) 6378137 298.257222101 1 Geodetic Lattitude Lat degree north 2 Geodetic Longitude Lon degree east 3 Elipsoidal height h metre up Unclassified Data is available online for bulk and custom downloads. None Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10190 2024 Organization NOAA Office for Coastal Management Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. ZIP LAS/LAZ - LASer https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/egm08/10190/index.html 2024 Organization NOAA Office for Coastal Management Bulk Download Simple download of data files. LAZ LAS/LAZ - LASer Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/egm08/10190/supplemental/extent_ngs_nwhi_2021_m10190.kmz Browse Graphic Browse Graphic kmz This graphic shows the lidar footprint for this dataset. OS Independent The horizontal accuracy of the data is better than plus or minus 1.0 m. Data used to test the lidar was collected with Static GPS Observations and compared against the published data. The vertical accuracy of the data is better than plus or minus 0.15 m at 1 sigma. Not applicable Yes Unknown Yes NCEI-CO Data is backed up to tape and to cloud storage. Acquisition and Processing Organization Woolpert Originator 1 Woolpert acquired, calibrated, and performed the refraction correction of the lidar data. Light travels at different speeds in air versus water and its direction of travel or angle is changed or refracted when entering the water column. The refraction correction process corrects for this difference by adjusting the depth (distance traveled) and horizontal position (change of angle/direction) of the lidar data acquired within water. Relative accuracy of the swaths compared to overlapping and adjacent swaths was verified through the use of Delta-Z (DZ) orthos created in LASTools software. Profiles of elevated planar features, such as roofs, were used to verify horizontal alignment between overlapping swaths. The NovAtel software was utilized for GPS and inertial processing, Data were processed to an initial LAS format using the Leica Lidar Survey Studio software. Algorithms in TerraScan was used to create the initial ground surface. All lidar data was peer-reviewed. QAQC also included creating void polygons for use during review. All necessary edits were applied to the dataset. LASTools was used to update LAS header information, including all projection and coordinate reference system information. The final lidar data is in LAS format 1.4 and point data record format 6. Data were processed in NAD83 (PA11) horizontal and vertical datum. The National Oceanic and Atmospheric Administration (NOAA) received files in laz format. The files contained lidar elevation and intensity measurements. With the exception of Niihau, data was delivered in UTM Zone 3 coordinates and ellipsoid elevations in meters. Horizontal Datum-NAD83 (PA11) epoch: 2010.0 Projection-UTM Zone 3 North Horizontal Units-meters Vertical Datum-NAD83 (PA11) Ellipsoid height Vertical Units-meters The final classification scheme for all data delivered to NOAA is as follows: 1-Unclassified 2-Ground 7-Low Noise 9-Topo Water Surface 18-High Noise 40-Bathymetric Point 41-Bathymetric Water Surface 42-Synthetic Derived Water Surface 43-Submerged Object 44-International Hydrographic Organization (IHO) S-57 Object 64-Submerged Aquatic Vegetation 65-Bathymetric Bottom Temporal Changes 2024-01-17T00:00:00 Organization National Geodetic Survey NGS https://ror.org/02f762h70 1315 East-West Hwy Silver Spring MD 20910 https://geodesy.noaa.gov/ 2 The NOAA Office for Coastal Management (OCM) received files in laz format. The files contained lidar elevation and intensity measurements from French Frigate Shoals, Nihoa and Niihau, Hawaii. The data were in UTM Zone 3 coordinates and ellipsoid elevations in meters. OCM performed the following processing on the data for Digital Coast storage and provisioning purposes: 1. Converted from UTM to geographic coordinates 2. Sorted by gps time 2024-10-22T00:00:00 Organization Office for Coastal Management OCM https://ror.org/05v14bq57 2234 South Hobson Avenue Charleston SC 29405-2413 https://www.coast.noaa.gov/ 73690 Entity gov.noaa.nmfs.inport:73689 Maryellen Sault 2024-10-18T19:02:45 SysAdmin InPortAdmin 2026-03-04T19:17:27 2024-10-30 National Geodetic Survey NGS 1002 Public No No 2022-04-11 3 Years 2025-04-11