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2023 NOAA Lidar DEM: AK Coastal Communties (Dillingham/Aleknagik, Ekuk, Ekwok, Koliganek, Manokotak, New Stuyahok)

Published by Office for Coastal Management | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 2025-01-01T00:00:00.000+00:00
Original Product: Hydroflattened Digital Elevation Model (DEM) data covering the NOAA AK Coastal 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: Lidar flight line swaths were processed to create 1,611 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 1,611 - 0.5 meter hydro-flattened Raster DEMs delineated in 750m x 750m tiles tiles. 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. Additional products include classified LAS files, intensity images, maximum surface height rasters, and 3D breaklines of rivers and lakes within the study area. Ground Condition: Ground conditions were free of snow and acquisition occurred free of smoke, fog and cloud cover.

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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 Coastal 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: Lidar flight line swaths were processed to create 1,611 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 1,611 - 0.5 meter hydro-flattened Raster DEMs delineated in 750m x 750m tiles tiles. 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. Additional products include classified LAS files, intensity images, maximum surface height rasters, and 3D breaklines of rivers and lakes 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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    "@type": "dcat:Distribution",
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    "accessURL": "https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/dem/AK_CstalComms_DEM_2023_10425/index.html",
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identifier gov.noaa.nmfs.inport:77586
issued 2023-01-01T00:00:00.000+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/77586
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/77586.pdf"
]
rights otherRestrictions, unclassified
spatial -158.42,58.98,-158.86,59.37
temporal 2023-09-17T00:00:00+00:00/2023-09-18T00:00:00+00:00
title 2023 NOAA Lidar DEM: AK Coastal Communties (Dillingham/Aleknagik, Ekuk, Ekwok, Koliganek, Manokotak, New Stuyahok)

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