gov.noaa.nmfs.inport:80299 eng UTF8 dataset Elevation OCM Partners resourceProvider NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact 2026-08-03T12:41:08 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) 2025 NC GIA Lidar DEM: Post-Helene, North Carolina PostHelene-NC_2025 DEM m14054 2025 publication NOAA/NMFS/EDM 80299 https://www.fisheries.noaa.gov/inport/item/80299 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://coast.noaa.gov/ WWW:LINK-1.0-http--link NOAA's Office for Coastal Management (OCM) website Information on the NOAA Office for Coastal Management (OCM) download https://coast.noaa.gov/dataviewer/ WWW:LINK-1.0-http--link NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) 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. download Product: These data were acquired by the NC Collaboratory at UNC Chapel Hill utilizing funds appropriated by the NC General Assembly. These are Digital Elevation Model (DEM) data for North Carolina as part of the required deliverables for the NC_Lidar_Phase3_Draft_Metadata project. Class 2 (ground) LiDAR points in conjunction with the hydro breaklines were used to create a 3.125 ft, 10-ft, and 20 ft hydro-flattened Raster DEM. The Class 2 points were derived from the proeject data collected and processed at a USGS QL1 level of quality. Geographic Extent: 12 counties in North Carolina, covering approximately 5,060 total square miles. Counties covered in their entirety for this project included: Ashe, Watauga, Avery, Mitchell, Burke, Yancey, McDowell, Rutherford, Buncombe, Henderson, Haywood, and Jackson. Dataset Description: The Helene-North Carolina Priority 1 Lidar and Imagery project called for the planning, acquisition, and processing of lidar data to be collected at an approximate 8 points per square meter to meet USGS QL1 specifications. Project specifications are based on the USGS Lidar Base Specifications along with specific North Carolina Emergency Management standards for the North Carolina Floodplain Mapping Program for lidar classification types and specialized, derivative products. In addition to project oversight AECOM's performed an independent quality assurance effort against project specifications. This effort was limited to a 10% review of the lidar tiles and coincident vector Geodatabases in each county. Additionbally a randomized 5% review of the ESRI terrains, DEM, and intensity rasters was also performed. To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create intensity images, breaklines and raster DEMs. The purpose of these LiDAR data was to produce high accuracy 3D hydro-flattened digital elevation models (DEMs) with a 3.125 ft, 5-ft, and 10 ft cell size. These raw LiDAR point cloud data were used to create classified LiDAR LAS files, intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. AECOM Technical Services, Inc.; State of North Carolina completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information custodian notPlanned EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION theme Global Change Master Directory (GCMD) Science Keywords 23.3 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA VERTICAL LOCATION > LAND SURFACE place Global Change Master Directory (GCMD) Location Keywords 23.3 LIDAR > Light Detection and Ranging instrument Global Change Master Directory (GCMD) Instrument Keywords 23.3 Airplane > Airplane platform Global Change Master Directory (GCMD) Platform Keywords 23.3 DEM Elevation Data Lidar Model Raster Remote Sensing theme Ashe County Avery County Buncombe County Burke County Haywood County Henderson County Jackson County McDowell County Mitchell County North Carolina Rutherford County Watauga County Yancey County place DEMs - partner (no harvest) project InPort otherRestrictions Cite As: OCM Partners, [Date of Access]: 2025 NC GIA Lidar DEM: Post-Helene, North Carolina [Data Date Range], https://www.fisheries.noaa.gov/inport/item/80299. 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. license To the extent possible under law, the U.S. Government has waived all copyright and related or neighboring rights to this dataset. otherRestrictions Access Constraints: None otherRestrictions 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. otherRestrictions 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 unclassified eng; US elevation -83.266278837 -80.582747359 34.58587958 36.332719738 | Currentness: Ground Condition 2025-01-09 2025-03-28 Raster File Type = GeoTIFF; Bit Depth/Pixel Type = 32-bit float; Raster Cell Size = 3.125 ft, 5-ft, and 10 ft; Interpolation or Resampling Technique = Triangulated Irregular Network (TIN), Linear Interpolation, Proprietary; Required Vertical Accuracy = 0.196 Zip NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/dem/NC_Statewide_2024_14054/index.html WWW:LINK-1.0-http--link Bulk Download Bulk download of data files in the original coordinate system. download https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=14054/details/14054 WWW:LINK-1.0-http--link Customized Download Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base. download dataset Horizontal Positional Accuracy This data set was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data, Edition 2 (2023) for a 22(cm) RMSEh horizontal positional accuracy Class. Vertical Positional Accuracy The specifications require that only nonvegetated vertical accuracy (NVA) be computed for raw LiDAR data swath files. The vertical accuracy was tested with 81 independent survey points located in open terrain. These check points were not used in the calibration or post processing of the LiDAR data. The survey check points were distributed throughout the project area.Qualitative value:0.0219 , Test that produced the value: This data set was tested to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data, Edition 2 (2023) for a 10 (cm) RMSEv Vertical Accuracy Class. NVA accuracy was found to be RMSEv = 2.19 (cm). Completeness Report Datasets contain complete coverage of tiles. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. There are no void areas or missing data. The raw point cloud is of good quality and data pass Non-Vegetated Vertical Accuracy specifications. Conceptual Consistency Data cover the entire area specified for this project. Hydro-Flattened Raster DEM Processing: Class 2 (Ground) LiDAR points in conjunction with the hydro-breaklines were used to create a 3.125 ft, 10-ft, and 20 ft hydro-flattened raster DEM. Using automated scripting routines in proprietary software, GeoTIFF files were created for each tile. Each surface was reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface. 2025-01-01T00:00:00 Data were received by NOAA Office of Coastal Management from the North Carolina Spatial Data Download system. Data were ingested into the NOAA Digital Coast Data Access Viewer without change. 2026-08-01T00:00:00 NOAA Office for Coastal Management (843) 740-1202 coastal.info@noaa.gov processor Source Contribution: Data was requested through the NC SDD system and transferred directly to cloud storage. Post-Helene Digital Elevation Model in Western North Carolina 2026-03-25 publication North Carolina Spatial Data Download https://sdd.nc.gov/ WWW:LINK-1.0-http--link North Carolina Spatial Data Download Download system for North Carolina Lidar information originator