Description
Original Product: Classified LAZ 1.4 files, formatted to 1611 individual 750m x 750m tiles covering the NOAA AK Communities 2023 project area.
Original Geographic Extent: This dataset and derived products encompass six areas in southwest Alaska, covering approximately 183,738 acres.
Original Dataset Description: The NOAA AK Coastal Communities 2023 Lidar project called for the planning, acquisition, and processing of lidar data collected to Quality Level 1 (QL1) standards. Project specifications are based on the U.S. Geological Survey National Geospatial Program Lidar Base Specification Version 2023, Revision A. The data was developed based on the NAD83 2011 horizontal datum and the NAVD88 Geoid 12b vertical datum. Data was projected in UTM Zone 4N, Meters. Lidar data was delivered as calibrated and classified LAZ 1.4 files. Non-Vegetated Vertical Accuracy (NVA) was assessed using 124 check points located on bare earth in clear, unobstructed areas. Vegetated Vertical Accuracy (VVA) was assessed using 37 check points in Tall Grass, Forest, and Shrub landcover types. Single swath nominal pulse spacing (NPS) was designed to be 0.35 at nadir. Aggregate Nominal Pulse Spacing (ANPS) was calculated to be 0.269 using all valid first return points. Derived products include: Intensity Imagery, Hydro-flattened Bare Earth Digital Elevation Models (DEMs), Highest Hit Digital Surface Models (DSMs), and 3D waters edge breaklines.
Ground Condition: Ground conditions were free of snow and acquisition occurred free of smoke, fog and cloud cover.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| NOAA Office for Coastal Management Website | Unknown | NOAA Office for Coastal Management Home Page | Open resource |
| NOAA Office for Coastal Management Website | Unknown | NOAA Office for Coastal Management Home Page | Open resource |
| NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) | Unknown | The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. | Open resource |
| Customized Download | Unknown | Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Change to an orthometric vertical datum is one of the many options. | |
| Potree 3D View | JSON | Link to view the point cloud (using the Entwine Point Tile (EPT) format) in the 3D Potree viewer. | Open resource |
| GCMD Keyword Forum Page | Unknown | Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords | Open resource |
| Entwine Point Tile (EPT) | JSON | Entwine Point Tile (EPT) is a simple and flexible octree-based storage format for point cloud data. The data is organized in such a way that the data can be reasonably streamed over the internet, pulling only the points you need. EPT files can be queried to return a subset of the points that give you a representation of the area. As you zoom further in, you are requesting higher and higher densities. A dataset in EPT will contain a lot of files, however, the ept.json file describes all the rest. The EPT file can be used in Potree and QGIS to view the point cloud. | Open resource |
| Breaklines | HTML | Link to the hydro breaklines in Esri gdb and OGC GeoPackage formats. | Open resource |
| Bulk Download | HTML | Bulk download of data files in LAZ format, UTM Zone 4N NAD83(2011) meters coordinates and elevations in NAVD88(GEOID12B) meters. | Open resource |
| Lidar Report | Link to the NV5 lidar report. | Open resource | |
| Full Metadata Record | Unknown | View the complete metadata record on InPort for more information about this dataset. | Open resource |
| NOAA Data Management Plan (DMP) | NOAA Data Management Plan for this record on InPort. | Open resource |
Tags
- airplane
- alaska
- coastal elevation
- coastal processes
- continent
- doc/noaa/nos/ocm
- earth science
- land surface
- lidar
- light detection and ranging
- national ocean service
- noaa
- north america
- oceans
- office of coastal management
- terrain elevation
- topography
- united states of america
- u.s. department of commerce
- vertical location