2024 NOAA Lidar DEM: AK Coastal Communities (Eek, Goodnews Bay, Nelson Lagoon, Quinhagak, Togiak)
Original Product: Hydroflattened Digital Elevation Model (DEM) data covering the NOAA AK Communities 2025 project area.
Original Dataset Geographic Extent: This dataset and derived products encompass five areas covering approximately 92,475 acres of Southwest Alaska.
Original Dataset Description: Lidar flight line swaths were processed to create 825 classified LAS 1.4 files delineated in 750m x 750m tiles tiles. Each LAS file contains lidar point information, which has been calibrated, controlled, and classified. Class 2 (ground) lidar points in conjunction with the hydro breaklines were used to create 825 - 0.5 meter hydro-flattened Raster DEMs delineated in 750m x 750m tiles tiles. Non-Vegetated Vertical Accuracy (NVA) was assessed using 101 check points located on bare earth in clear, unobstructed areas. Vegetated Vertical Accuracy (VVA) was assessed using 26 check points in Tall Grass, Forest, and Shrub landcover types. Additional products include classified LAS files, intensity images, maximum surface height rasters, and 3D breaklines of water bodies within the study area.
Ground Condition: Ground conditions were free of snow and acquisition occurred free of smoke, fog and cloud cover.
Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | non-public |
| contactPoint |
{
"fn": "NOAA Office for Coastal Management",
"@type": "vcard:Contact",
"hasEmail": "mailto:coastal.info@noaa.gov"
}
|
| describedByType | application/octet-steam |
| description | Original Product: Hydroflattened Digital Elevation Model (DEM) data covering the NOAA AK Communities 2025 project area. Original Dataset Geographic Extent: This dataset and derived products encompass five areas covering approximately 92,475 acres of Southwest Alaska. Original Dataset Description: Lidar flight line swaths were processed to create 825 classified LAS 1.4 files delineated in 750m x 750m tiles tiles. Each LAS file contains lidar point information, which has been calibrated, controlled, and classified. Class 2 (ground) lidar points in conjunction with the hydro breaklines were used to create 825 - 0.5 meter hydro-flattened Raster DEMs delineated in 750m x 750m tiles tiles. Non-Vegetated Vertical Accuracy (NVA) was assessed using 101 check points located on bare earth in clear, unobstructed areas. Vegetated Vertical Accuracy (VVA) was assessed using 26 check points in Tall Grass, Forest, and Shrub landcover types. Additional products include classified LAS files, intensity images, maximum surface height rasters, and 3D breaklines of water bodies within the study area. Ground Condition: Ground conditions were free of snow and acquisition occurred free of smoke, fog and cloud cover. |
| distribution |
[
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"accessURL": "https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/dem/AK_CstalComms_DEM_2024_10427/index.html",
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|
| identifier | gov.noaa.nmfs.inport:77599 |
| issued | 2024-01-01T00:00:00.000+00:00 |
| keyword |
[
"EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION",
"EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM)",
"EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION",
"CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA",
"CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA",
"VERTICAL LOCATION > LAND SURFACE",
"LIDAR > Light Detection and Ranging",
"Airplane > Airplane",
"DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce",
"DEMs"
]
|
| landingPage | https://www.fisheries.noaa.gov/inport/item/77599 |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2025-01-01T00:00:00.000+00:00 |
| publisher |
{
"name": "Office for Coastal Management",
"@type": "org:Organization"
}
|
| references |
[
"https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocm/dmp/pdf/77599.pdf"
]
|
| rights | otherRestrictions, unclassified |
| spatial | -162.0,60.19,-162.05,60.23 |
| title | 2024 NOAA Lidar DEM: AK Coastal Communities (Eek, Goodnews Bay, Nelson Lagoon, Quinhagak, Togiak) |
