74863 ca2021_sierra_nev_dem_m10262 Data Set Published / External 49404 DEMs - partner (no harvest) Project Completed 2021 2023-08-29 Original Dataset Product: Hydro-flattened 0.5 m Digital Elevation Model (DEM) data covering the CA Sierra Nevada project area. Original Dataset Geographic Extent: CA_SierraNevada_1_2022 (Work Unit 300057) - This dataset and derived products encompass an area covering approximately 1204 square miles in the northern region of the project. CA_SierraNevada_2_2022 (Work Unit 300058) - This dataset and derived products encompass an area covering approximately 1687 square miles in the northern region of the project. CA_SierraNevada_3_2022 (Work Unit 300059) - This dataset and derived products encompass an area covering approximately 1353 square miles in the northern region of the project. CA_SierraNevada_4_2022 (Work Unit 300244) - This dataset and derived products encompass an area covering approximately 2688 square miles in the northern region of the project. CA_SierraNevada_5_2022 (Work Unit 300245) - This dataset and derived products encompass an area covering approximately 2298 square miles in the central region of the project. CA_SierraNevada_6_2022 (Work Unit 300246) - This dataset and derived products encompass an area covering approximately 2136 square miles in the northern region of the project. CA_SierraNevada_7_2022 (Work Unit 300271) - This dataset and derived products encompass an area covering approximately 1193 square miles in the northern region of the project. CA_SierraNevada_8_2022 (Work Unit 300363) - This dataset and derived products encompass an area covering approximately 2167 square miles in the central region of the project. This area includes the Sierra Nevada Mountains from the eastern shore of Lake Tahoe west to the ridgeline of the Carson Range, most of the city of South Lake Tahoe and traverses due south to the unincorporated community of Strawberry, then follows the mountain ridge between Tuolumne and Mono counties. It includes the community of Bridgeport and spans east-northeast to the Nevada border. CA_SierraNevada_9_2022 (Work Unit 300364) - This dataset and derived products encompass an area covering approximately 2944 square miles in the southern region of the project. CA_SierraNevada_10_2022 (Work Unit 300365) - This dataset and derived products encompass an area covering approximately 2593 square miles in the southern region of the project. CA_SierraNevada_11_2022 (Work Unit 300459) - This dataset and derived products encompass an area covering approximately 1771 square miles in the central region of the project. CA_SierraNevada_12_2022 (Work Unit 300460) - This dataset and derived products encompass an area covering approximately 1410 square miles in the central region of the project. CA_SierraNevada_13_2022 (Work Unit 300461) - This dataset and derived products encompass an area covering approximately 3094 square miles in the central region of the project. CA_SierraNevada_14_2022 (Work Unit 300462) - This dataset and derived products encompass an area covering approximately 3866 square miles in the southern region of the project. Original Dataset Description: Lidar flight line swaths were processed to create classified LAS 1.4 files delineated in 1,000m x 1,000m 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 0.5 meter hydro-flattened Raster DEMs delineated in 1,000m x 1,000m tiles. Additional products include classified LAS files, intensity images, highest hit surface models, and 3D breaklines of rivers and lakes within the study area. Original Dataset Ground Conditions: Acquisition occurred free of smoke, fog and cloud cover. 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 was to produce a high accuracy 3D dataset that meets all necessary standards laid out by the 3D Elevation Program. The Natural Resources Conservation Service (NRCS), and the University of California San Diego (UCSD) were partners. The lidar point cloud data were used to create classified lidar LAS files, intensity images, hydro-flattened DEMs, highest hit surface models, and 3D breaklines of rivers and lakes within the study area. Data were collected to aid UCSD & USGS in assessing the topographic and geophysical properties of the study area to support fire mitigation and natural disaster mitigation mapping. USGS Contract No. 140G0221D0012 Raster File Type = TIFF Bit Depth/Pixel Type = 32-bit float Raster Cell Size = 0.5 meter Interpolation or Resampling Technique = Triangulated Irregular Network Required Vertical Accuracy = 19.6 cm NVA Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) Theme ISO 19115 Topic Category elevation Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CALIFORNIA Spatial Global Change Master Directory (GCMD) Location Keywords VERTICAL LOCATION > LAND SURFACE Instrument Global Change Master Directory (GCMD) Instrument Keywords LIDAR > Light Detection and Ranging Platform Global Change Master Directory (GCMD) Platform Keywords Airplane > Airplane Office for Coastal Management Charleston SC Data Set Elevation As Needed Model (digital) Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners. NV5 Geospatial, UCSD, NRCS, USGS Data Steward 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2024 Organization U.S. Geological Survey 12201 Sunrise Valley Drive Reston VA 20191 USA https://usgs.gov USGS Home Home page for USGS Online Resource Metadata Contact 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -121.437338 -120.380923 39.270645 38.486708 CA_SierraNevada_2 (Work Unit 300058) Range 2021-11-16 2021-12-01 Dates of collection for CA_SierraNevada_2 (Work Unit 300058) -121.05769 -120.175741 38.498961 37.786625 CA_SierraNevada_3 (Work Unit 300059) Range 2021-11-23 2021-12-02 Dates of collection for CA_SierraNevada_3 (Work Unit 300059) -120.731563 -119.933233 39.438582 38.048147 CA_SierraNevada_5 (Work Unit 300245) Range 2021-11-12 2022-08-22 Dates of collection for CA_SierraNevada_5 (Work Unit 300245) -119.106238 -117.885824 36.510997 35.720918 CA_SierraNevada_9 (Work Unit 300364) Range 2022-06-19 2022-08-31 Dates of collection for CA_SierraNevada_9 (Work Unit 300364) -119.002111 -117.874114 35.740953 34.770761 CA_SierraNevada_10 (Work Unit 300365) Range 2022-06-19 2022-08-30 Dates of collection for CA_SierraNevada_10 (Work Unit 300365) -120.060684 -119.322758 38.221184 36.868443 CA_SierraNevada_11 (Work Unit 300459) Range 2022-06-02 2022-08-26 Dates of collection for CA_SierraNevada_11 (Work Unit 300459) -120.64747 -119.938561 39.333061 37.107001 CA_SierraNevada_12 (Work Unit 300460) Range 2021-11-18 2022-08-25 Dates of collection for CA_SierraNevada_12 (Work Unit 300460) -121.862591 -120.926724 40.005482 39.17323 CA_SierraNevada_1 (Work Unit 300057) Range 2021-11-07 2021-11-29 Dates of collection for CA_SierraNevada_1 (Work Unit 300057) -121.620049 -120.300979 40.438079 38.927053 CA_SierraNevada_4 (Work Unit 300244) Range 2021-11-03 2021-12-05 Dates of collection for CA_SierraNevada_4 (Work Unit 300244) -120.995495 -119.962807 40.209573 39.215808 CA_SierraNevada_6 (Work Unit 300246) Range 2021-11-03 2022-08-19 Dates of collection for CA_SierraNevada_6 (Work Unit 300246) -121.836463 -119.927303 40.662722 39.710308 CA_SierraNevada_7 (Work Unit 300271) Range 2021-11-04 2022-08-24 Dates of collection for CA_SierraNevada_7 (Work Unit 300271) -120.061858 -118.902833 39.333061 38.008265 CA_SierraNevada_8 (Work Unit 300363) Range 2021-11-18 2022-08-25 Dates of collection for CA_SierraNevada_8 (Work Unit 300363) -119.513796 -118.280195 38.259724 37.065474 CA_SierraNevada_13 (Work Unit 300461) Range 2022-06-04 2022-09-17 Dates of collection for CA_SierraNevada_13 (Work Unit 300461) -119.628676 -118.028538 37.321064 36.224812 CA_SierraNevada_14 (Work Unit 300462) Range 2022-06-04 2022-09-23 Dates of collection for CA_SierraNevada_14 (Work Unit 300462) Yes No No No No Vertical EPSG:5703 NAVD88 height North American Vertical Datum 1988 1 Gravity-related height H metre up Projected EPSG:6340 NAD83(2011) / UTM zone 11N NAD83 (National Spatial Reference System 2011) GRS 1980 6378137 298.257222101 NAD83(2011) UTM zone 11N Transverse Mercator Latitude of natural origin 0° 0' 0" N Longitude of natural origin 117° 0' 0" W Scale factor at natural origin 0.9996 False easting 500000 metre False northing 0 metre 1 Easting E metre east 2 Northing N metre north Projected EPSG:6339 NAD83(2011) / UTM zone 10N NAD83 (National Spatial Reference System 2011) GRS 1980 6378137 298.257222101 NAD83(2011) UTM zone 10N Transverse Mercator Latitude of natural origin 0° 0' 0" N Longitude of natural origin 123° 0' 0" W Scale factor at natural origin 0.9996 False easting 500000 metre False northing 0 metre 1 Easting E metre east 2 Northing N metre north Custom Unclassified Data is available online for bulk and custom downloads. None 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. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10262/details/10262 2025 Organization NOAA Office for Coastal Management 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. Not Applicable Zip https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/ 2024 Organization U.S. Geological Survey Bulk Download Bulk download of data files in GeoTIFF format, UTM Zones 10N and 11N NAD83(2011), meters coordinates and elevations in NAVD88 (Geoid18) meters. GeoTIFF https://coast.noaa.gov/dataviewer/ NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) Online Resource HTML 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. https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_10_2022/reports/CA_SierraNevada_10_2022_Lidar_Mapping_Report_WU300365_Rev_05212024.pdf Lidar Report - CA_SierraNevada_10 Online Resource pdf Link to the lidar report for CA_SierraNevada_10 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_11_B22/reports/140G0222F0176_CA_SierraNevada_2022_WU_300459_WU11_Report_Final_Revised.pdf Lidar Report - CA_SierraNevada_11 Online Resource pdf Link to the lidar report for CA_SierraNevada_11 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_12_B22/reports/140G0222F0176_CA_SierraNevada_2022_WU_300460_WU12_Report_Final.pdf Lidar Report - CA_SierraNevada_12 Online Resource pdf Link to the lidar report for CA_SierraNevada_12 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_13_B22/reports/140G0222F0176_CA_SierraNevada_2022_WU_300461_WU13_Report_Final.pdf Lidar Report - CA_SierraNevada_13 Online Resource pdf Link to the lidar report for CA_SierraNevada_13 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_14_B22/reports/140G0222F0176_CA_SierraNevada_2022_WU_300462_WU14_Report_Revision.pdf Lidar Report - CA_SierraNevada_14 Online Resource pdf Link to the lidar report for CA_SierraNevada_14 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_1_2022/reports/140G0222F0176_CA_SierraNevada_2022_WU_300057_WU1_Final_Report_Revised%20-%20signed.pdf Lidar Report - CA_SierraNevada_1 Online Resource pdf Link to the lidar report for CA_SierraNevada_1 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_2_2022/reports/140G0222F0176_CA_SierraNevada_2022_WU_300058_WU2_Final_Report_Revised%20-%20signed.pdf Lidar Report - CA_SierraNevada_2 Online Resource pdf Link to the lidar report for CA_SierraNevada_2 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_3_2022/reports/140G0222F0176_CA_SierraNevada_1_2022_WU_300059_WU%233_Final_Rev.1%20-%20signed.pdf Lidar Report - CA_SierraNevada_3 Online Resource pdf Link to the lidar report for CA_SierraNevada_3 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_4_2022/reports/140G0222F0176_CA_SierraNevada_2022_WU_300244_WU4_Final_Report_Revised%20-%20signed.pdf Lidar Report - CA_SierraNevada_4 Online Resource pdf Link to the lidar report for CA_SierraNevada_4 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_5_2022/reports/140G0222F0176_CA_SierraNevada_2022_WU_300245_WU5_Final_Report_Revised.pdf Lidar Report - CA_SierraNevada_5 Online Resource pdf Link to the lidar report for CA_SierraNevada_5 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_6_2022/reports/140G0222F0176_CA_SierraNevada_2022_WU_300246_WU6_Final_Report_Revised%20-%20signed.pdf Lidar Report - CA_SierraNevada_6 Online Resource pdf Link to the lidar report for CA_SierraNevada_6 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_7_2022/reports/140G0222F0176_CA_SierraNevada_2022_WU_300271_WU7_Final_Report_Revised.pdf Lidar Report - CA_SierraNevada_7 Online Resource pdf Link to the lidar report for CA_SierraNevada_7 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_8_2022/reports/140G0222F0176_CA_SierraNevada_2022_WU_300363_WU8_Final_Report_Revised.pdf Lidar Report - CA_SierraNevada_8 Online Resource pdf Link to the lidar report for CA_SierraNevada_8 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/CA_SierraNevada_9_2022/reports/CA_SierraNevada_9_2022_Lidar_Mapping_Report_WU300364_DS_rev_05212024.pdf Lidar Report - CA_SierraNevada_9 Online Resource pdf Link to the lidar report for CA_SierraNevada_9 https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/CA_SierraNevada_B22/USGS_CA_SierraNevada_B22_Project_Report.pdf USGS Project Report Online Resource pdf Link to the USGS Project Report that provides information about the project, vertical accuracy results, and the point classes and sensors used. https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/CA_SierraNevada_B22/ USGS Additional Info Online Resource This link is to the reports, breaklines, metadata, spatial metadata, and shapefiles. Lidar horizontal accuracy is a function of Global Navigation Satellite System (GNSS) derived positional error, flying altitude, and INS derived attitude error. The obtained RMSEr value is multiplied by a conversion factor of 1.7308 to yield the horizontal component of the National Standards for Spatial Data Accuracy (NSSDA) reporting standard where a theoretical point will fall within the obtained radius 95 percent of the time. Based on a flying altitude of 2,500 meters, an IMU error of 0.002 decimal degrees, and a GNSS positional error of 0.019 meters, these blocks were produced to meet 0.27 meters horizontal accuracy at the 95% confidence level or 16 cm RMSEr. CA_SierraNevada_1_2022 (Work Unit 300057) CA_SierraNevada_2_2022 (Work Unit 300058) CA_SierraNevada_3_2022 (Work Unit 300059) CA_SierraNevada_4_2022 (Work Unit 300244) CA_SierraNevada_5_2022 (Work Unit 300245) CA_SierraNevada_6_2022 (Work Unit 300246) CA_SierraNevada_7_2022 (Work Unit 300271) CA_SierraNevada_8_2022 (Work Unit 300363) - Based on a flying altitude of 2,500 meters, an IMU error of 0.003 decimal degrees, and a GNSS positional error of 0.023 meters, this project was produced to meet 0.410 meters horizontal accuracy at the 95% confidence level or 23.5 cm RMSEr. CA_SierraNevada_9_2022 (Work Unit 300364) - This data set was produced to meet +/- 0.509 m at the 95% confidence level or 29 cm RMSEr. CA_SierraNevada_10_2022 (Work Unit 300365) - This data set was produced to meet +/- 0.509 m at a 95% confidence level or 29 cm RMSEr. CA_SierraNevada_11_2022 (Work Unit 300459) - Based on a flying altitude of 2,500 meters, an IMU error of 0.002 decimal degrees, and a GNSS positional error of 0.027 meters, this project was produced to meet 0.274 meters horizontal accuracy at the 95% confidence level or 15.8 cm RMSEr. CA_SierraNevada_12_2022 (Work Unit 300460) - Based on a flying altitude of 2,500 meters, an IMU error of 0.002 decimal degrees, and a GNSS positional error of 0.023 meters, this project was produced to meet 0.273 meters horizontal accuracy at the 95% confidence level or 15.8 cm RMSEr. CA_SierraNevada_13_2022 (Work Unit 300461) - Based on a flying altitude of 2,500 meters, an IMU error of 0.003 decimal degrees, and a GNSS positional error of 0.023 meters, this project was produced to meet 0.407 meters horizontal accuracy at the 95% confidence level or 23.5 cm RMSEr. CA_SierraNevada_14_2022 (Work Unit 300462) - . Based on a flying altitude of 2,500 meters, an IMU error of 0.002 decimal degrees, and a GNSS positional error of 0.023 meters, this project was produced to meet 0.273 meters horizontal accuracy at the 95% confidence level or 15.8 cm RMSEr. This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class. The specifications require that classified Non-vegetated Vertical Accuracy (NVA) be computed from the derived DEMs. USGS DEM Determined Vertical Accuracy: Non-Vegetated Vertical Accuracy (NVA) = 5.04 cm RMSE Vegetated Vertical Accuracy (VVA) = 24.69 cm at 95th Percentile A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist. The raw point cloud is of good quality and data passes Non-Vegetated Vertical Accuracy specifications. DEM files were tested by NV5 for vertical accuracy. All data is seamless from one tile to the next, no gaps or no data areas. Yes Unknown Yes NCEI-NC Data is backed up to cloud storage. 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. USGS GeoTIFF Files - CA_SierraNevada_1 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_1_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_1 USGS GeoTIFF Files - CA_SierraNevada_10 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_10_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_10 USGS GeoTIFF Files - CA_SierraNevada_11 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_11_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_11 USGS GeoTIFF Files - CA_SierraNevada_12 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_12_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_12 USGS GeoTIFF Files - CA_SierraNevada_13 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_13_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_13 USGS GeoTIFF Files - CA_SierraNevada_14 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_14_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_14 USGS GeoTIFF Files - CA_SierraNevada_2 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_2_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_2 USGS GeoTIFF Files - CA_SierraNevada_3 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_3_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_3 USGS GeoTIFF Files - CA_SierraNevada_4 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_4_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_4 USGS GeoTIFF Files - CA_SierraNevada_5 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_5_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_5 USGS GeoTIFF Files - CA_SierraNevada_6 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_6_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_6 USGS GeoTIFF Files - CA_SierraNevada_7 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_7_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_7 USGS GeoTIFF Files - CA_SierraNevada_8 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_8_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_8 USGS GeoTIFF Files - CA_SierraNevada_9 Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_9_2022/TIFF/ USGS GeoTIFF Files for CA_SierraNevada_9 1 Lidar Pre-Processing: 1. Review flight lines and data to ensure complete coverage of the study area and positional accuracy of the laser points. 2. Resolve kinematic corrections for aircraft position data using kinematic aircraft GPS and static ground GPS data. 3. Develop a smoothed best estimate of trajectory (SBET) file that blends post-processed aircraft position with sensor head position and attitude recorded throughout the survey. 4. Calculate laser point position by associating SBET position to each laser point return time, scan angle, intensity, etc. Create raw laser point cloud data for the entire survey in *.las format. Convert data to orthometric elevations by applying a Geoid 18 correction. 5. Import raw laser points into manageable blocks to perform manual relative accuracy calibration and filter erroneous points. Classify ground points for individual flight lines. 6. Using ground classified points per each flight line, test the relative accuracy. Perform automated line-to-line calibrations for system attitude parameters (pitch, roll, heading), mirror flex (scale) and GPS/IMU drift. Calculate calibrations on ground classified points from paired flight lines and apply results to all points in a flight line. Use every flight line for relative accuracy calibration. 7. Adjust the point cloud by comparing ground classified points to supplemental ground control points. 2022-06-30T00:00:00 2 Lidar Post-Processing: 1. Classify data to ground and other client designated classifications using proprietary classification algorithms. 2. Manually QC data classification 3. After completion of classification and final QC approval, calculate final NVA and VVA values for the project using ground control quality check points. Final density information will also be calculated. 2022-06-30T00:00:00 3 Hydro-flattening Breaklines and Hydro-flattened DEM creation: Water boundary polygons were developed using an algorithm which weights lidar-derived slopes, intensities, and return densities to detect the water's edge. The water's edge was then manually reviewed and edited as necessary. Elevations were assigned to the water’s edge through neighborhood statistics identifying the lowest lidar return from the water surface. Lakes were assigned a consistent elevation for an entire polygon while rivers were assigned consistent elevations on opposing banks and smoothed to ensure downstream flow through the entire river channel. These breaklines were incorporated into the hydro-flattened DEM by enforcing triangle edges (adjacent to the breakline) to the elevation values derived from the breakline. This implementation corrected interpolation along the hard edge. Breaklines were also used to classify all ground points within the identified water bodies to class 9 (water). 2022-06-30T00:00:00 4 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_SierraNevada_B22/CA_SierraNevada_1_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_2_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_3_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_4_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_5_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_6_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_7_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_8_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_9_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_10_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_11_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_12_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_13_2022/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/CA_SierraNevada_B22/CA_SierraNevada_14_2022/TIFF/ 2025-02-12T00:00:00 Organization Office for Coastal Management OCM https://ror.org/05v14bq57 2234 South Hobson Avenue Charleston SC 29405-2413 https://www.coast.noaa.gov/ 79931 Data Set Cross Reference gov.noaa.nmfs.inport:74863 Rebecca Mataosky 2025-02-10T20:56:35 Rebecca Mataosky 2026-06-09T18:17:45 2025-02-12 OCM Partners OCMP 1002 Public No No 2025-02-12 1 Year 2026-02-12