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    • 2024 NOAA Lidar DEM: AK Coastal Communities (Kachemak Bay)

    Metadata Updated: September 11, 2025

    Original Product: Hydroflattened Digital Elevation Model (DEM) data covering the NOAA AK Communities 2025 project area.

    Original Geographic Extent: This dataset and derived products encompass an area covering approximately 286,327 acres of Southwest Alaska.

    Original Dataset Description: Lidar flight line swaths were processed to create 2,299 classified LAZ 1.4 files delineated in 750m x 750m tiles. Each LAZ 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 2,299 - 0.5 meter hydro-flattened Raster DEMs delineated in 750m x 750m tiles. Non-Vegetated Vertical Accuracy (NVA) was assessed using 43 check points located on bare earth in clear, unobstructed areas. Vegetated Vertical Accuracy (VVA) was assessed using 19 check points in Tall Grass, Forest, and Shrub landcover types. Additional products include classified LAZ files, intensity images, maximum surface height rasters, and 3D breaklines of water bodies within the study area.

    Ground Condition: Ground conditions contained snow at high elevations and acquisition occurred free of smoke, fog and cloud cover

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date September 3, 2025
    Metadata Created Date August 30, 2025
    Metadata Updated Date September 11, 2025
    Reference Date(s) 2024 (creation), 2025 (publication)
    Frequency Of Update notPlanned

    Metadata Source

    Harvested from NOS OCM

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date September 3, 2025
    Metadata Created Date August 30, 2025
    Metadata Updated Date September 11, 2025
    Reference Date(s) 2024 (creation), 2025 (publication)
    Responsible Party NOAA Office for Coastal Management (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:77562
    Access Constraints Cite As: Office for Coastal Management, [Date of Access]: 2024 NOAA Lidar DEM: AK Coastal Communities (Kachemak Bay) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/77562., Access Constraints: None, Use Constraints: 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., Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.
    Bbox East Long -150.849167
    Bbox North Lat 59.639355
    Bbox South Lat 59.222021
    Bbox West Long -151.995345
    Coupled Resource
    Frequency Of Update notPlanned
    Harvest Object Id 3df11b1f-e85d-41f2-8585-7ffb8be3c5ae
    Harvest Source Id c0121fd9-df15-4168-ac04-42f6e36a794d
    Harvest Source Title NOS OCM
    Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
    Lineage This data was collected by NV5 Geospatial for the NOAA Office for Coastal Management (OCM).
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-151.995345, 59.222021], [-150.849167, 59.222021], [-150.849167, 59.639355], [-151.995345, 59.639355], [-151.995345, 59.222021]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System EPSG::5703
    Spatial Harvester True
    Temporal Extent Begin 2023-08-01
    Temporal Extent End 2023-08-02

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