gov.noaa.nmfs.inport:77700 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 2026-04-30T00:00:00 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) EPSG::6339 EPSG::5703 2022 USGS Lidar DEM: Yurok Tribal Lands, CA ca2022_yurok_dem_m10429 2022 creation 2025 publication NOAA/NMFS/EDM 77700 https://www.fisheries.noaa.gov/inport/item/77700 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_Yurok_T23/USGS_CA_Yurok_T23_Project_Report.pdf WWW:LINK-1.0-http--link USGS Project Report Link to the USGS Project Report that provides information about the project, vertical accuracy results, and the point classes and sensors used. download https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_Yurok_T23/CA_Yurok_1_T23/reports/CA_Yurok_1_T23_LidarMappingReport_300077.pdf WWW:LINK-1.0-http--link Lidar Report Link to the lidar report. download https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_Yurok_T23/ WWW:LINK-1.0-http--link USGS Additional Info Link to the reports, breaklines, metadata, spatial metadata, and shapefiles. 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 Original Product: These are Digital Elevation Model (DEM) data for the USGS Yurok Tribe Ancestral Lands 3DEP LiDAR project. Class 2 (ground) lidar points in conjunction with the hydro breaklines were used to create a hydro-flattened DEM using LP360 2024.1.30.2. Original Geographic Extent: This dataset and derived products encompass an area covering approximately 1,320 Square Kilometers of Northern California covering the lower Klamath River and surrounding areas. Original Dataset Description: RAW flight line swaths were processed to create 1,456 classified LAS 1.4 files delineated in 1,000 m x 1,000 m tiles. Each LAS file contains LiDAR point information, which has been calibrated, controlled, and classified. Additional derived products include intensity images, hydro-flattened DEMs, Maximum Surface Height Rasters, Swath Separation Images (SSIs), and 3D breaklines of rivers and lakes within the study area. Ground conditions: Snow free, no unusual inundation. Coastal Areas were collected within plus or minus 120 minutes of predicted low tide at Crescent City, CA (841-9750). This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the GeoTIFF files hosted by USGS on Amazon Web Services. The purpose of the LiDAR data collection is to generate Quality Level 1 data for the USGS 3DEP program and supporting organizations. Raw Lidar point clouds were used to created classified LAS files, intensity images, hydroflattened Bare Earth Surface DEMs, and 3D breaklines of rivers and bodies of water. Yurok Tribe 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 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 theme Global Change Master Directory (GCMD) Science Keywords 23.3 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA 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 DEMs - partner (no harvest) project InPort otherRestrictions Cite As: OCM Partners, [Date of Access]: 2022 USGS Lidar DEM: Yurok Tribal Lands, CA [Data Date Range], https://www.fisheries.noaa.gov/inport/item/77700. 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 grid eng; US elevation LP360 2024.1.30.2; TerraScan 022.027; RiProcess 1.9.2.4; POSPac 8.8; LAStools 20220202, Windows 10 Operating System -124.1422284 -123.6095125 41.1673048 41.6847408 | Currentness: Ground Condition 2022-10-07 2022-12-06 USGS Contract No. 140G0322Q0250 Project ID: 300077 Contractor: Yurok Tribe Raster File Type = GeoTIFF (*.tif) Bit Depth/Pixel Type = 32-bit float Raster Cell Size = 0.5 Meter Interpolation or Re-sampling Technique = Triangulated Irregular Network Required Vertical Accuracy = 19.6 cm NVA Zip GeoTIFF 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 U.S. Geological Survey 12201 Sunrise Valley Drive Reston VA 20191 USA https://usgs.gov WWW:LINK-1.0-http--link USGS Home Home page for USGS information distributor https://coast.noaa.gov/dataviewer/#/lidar /search/where:ID=10429 /details/10429 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 https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_Yurok_T23/CA_Yurok_1_T23/TIFF/ WWW:LINK-1.0-http--link Bulk Download Bulk download of data files in GeoTIFF format, in UTM Zone 10 NAD83 (2011), meters coordinates and elevations in NAVD88 (GEOID18) meters. download dataset Horizontal Positional Accuracy Absolute horizontal accuracy was assessed using ground control points (GCPs), comprised of highly visible road markings throughout the DPA. A total of 8 GCPs were used to calculate horizontal accuracy against intensity images derived from LiDAR ground points. Based on the intensity analysis, this data set was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 10 cm RMSEx / RMSEy Horizontal Accuracy Class which equates to Positional Horizontal Accuracy = +/- 24.5 cm at a 95% confidence level. Vertical Positional Accuracy This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class. USGS Determined DEM Vertical Accuracy: Non-Vegetated Vertical Accuracy (NVA) = 6.01 cm RMSE Vegetated Vertical Accuracy (VVA) = 19.24 cm at 95th Percentile Completeness Report DEMs were created from the LAS files. These raw LAS data files include all data points collected. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. Small void areas exist in extremely dense vegetation where tall trees have shaded adjacent line coverage. Ground control points has been used to assess the data and to calculate the vertical accuracy of project. Conceptual Consistency Data covers the entire area specified for this project. The NOAA Office for Coastal Management (OCM) ingested references to the USGS GeoTIFF files that are hosted on Amazon Web Services (AWS), into the Digital Coast Data Access Viewer (DAV). The DAV accesses the raster data as it resides on AWS. Lidar Pre-Processing: Base station control, airborne GNSS and IMU data were merged to develop a Single Best Estimate of trajectory (SBET) of the lidar system for each lift. Lidar ranging data were initially calibrated using previous best parameters for this instrument and aircraft. Relative calibration was evaluated using advanced plane-matching analysis and parameter corrections derived. This process was repeated iteratively until residual errors between overlapping swaths, across all project lifts, was reduced to 2 cm or less. The data was checked against independently surveyed check points. Swath width was reduced from 58.5 degrees to 55 degrees with overlap points flagged as withheld. 2024-03-29T00:00:00 Lidar Post-Processing: Classify data to ground and other client designated classifications using proprietary classification algorithms. Manually QC data classifications. 2024-12-20T00:00:00 Hydroflattening Breaklines and Hydroflattened DEM: Breaklines were created using ArcGIS and LP360 Software using automated and manual methods to create hydro polygons around water surfaces. A centerline for each polygon was created and conflated to the water surface. Double-line drain methods were used to assign the waters edge elevation to match the surface elevation at the center of the water, hydroflattening each of the hydropolygons. Lakes and Ponds were assigned a consistent elevation, river polygons were assigned consistent elevations on each bank, and smoothed to ensure downstream flow. For more details on breakline creation, see accompanying LiDAR Mapping Report. "Raster File Type = GeoTIFF (*.tif) Bit Depth/Pixel Type = 32-bit float Raster Cell Size = 0.5 Meter Interpolation or Re-sampling Technique = Triangulated Irregular Network Required Vertical Accuracy = 19.6 cm NVA" 2024-12-20T00:00:00 The NOAA Office for Coastal Management (OCM) created references to the USGS GeoTIFF files that were ingested into the NOAA Digital Coast Data Access Viewer (DAV). No changes were made to the data. The DAV will access the raster data as it resides on Amazon Web Services (AWS). These are the GeoTIFF files that are being accessed: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_Yurok_T23/CA_Yurok_1_T23/TIFF/ 2025-09-08T00:00:00 NOAA Office for Coastal Management (843) 740-1202 coastal.info@noaa.gov processor USGS AWS GeoTIFF Files USGS https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_Yurok_T23/CA_Yurok_1_T23/TIFF/ WWW:LINK-1.0-http--link USGS AWS GeoTIFF files Source Citation URL information publisher