69357 2008 USFS dem sherman pass m9765 Data Set Published / External 49404 DEMs - partner (no harvest) Project Completed 2008-11-05 2023-02-09 Digital Elevation Model (DEM) created from Light Detection and Ranging data (lidar) of the Colville National Forest Study Area. The requested lidar area of interest (AOI) totals approximately 160 square miles, or 102,243 acres. This area was buffered by 100 meters to ensure data coverage, resulting in a total area flown (TAF) of 105,074 acres. Provide a digital elevation model for forestry management. This metadata was created years after the data collection based upon the available project report from the lidar contractor. Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION Theme ISO 19115 Topic Category elevation Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WASHINGTON 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 Data Set Elevation As Needed Model (digital) LAS format data with attributes of x, y, z, intensity, seconds of gps week, https://www.asprs.org/wp-content/uploads/2010/12/asprs_las_format_v11.pdf Data Steward 2023-02-09 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 2023-02-09 Organization Office for Coastal Management OCM https://ror.org/05v14bq57 2234 South Hobson Avenue Charleston SC 29405-2413 https://www.coast.noaa.gov/ Metadata Contact 2023-02-09 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 Colville National Forest Study Area -118.6703 -118.112 48.7066 48.5114 Range 2008-06-15 2008-06-24 Initial collection Discrete 2008-09-05 collection to fill gaps 3 Foot Yes Yes 3767993261 Projected EPSG:2926 NAD83(HARN) / Washington North (ftUS) NAD83 (High Accuracy Reference Network) GRS 1980 6378137 298.257222101 NAD83(HARN) SPCS83 Washington North zone (US Survey feet) Lambert Conic Conformal (2SP) 1 Easting X US survey foot east 2 Northing Y US survey foot north Vertical EPSG:6360 NAVD88 height (ftUS) North American Vertical Datum 1988 1 Gravity-related height H US survey foot up Unclassified None None None None https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9765 2023-02-09 Organization Office for Coastal Management https://ror.org/05v14bq57 Custom download allowing user selection of area, projection, format, etc. Zip Zip https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/USFS_Sherman_Pass_DEM_2008_9765/index.html 2023-02-09 Organization Office for Coastal Management https://ror.org/05v14bq57 Bulk download of files. GeoTIFF GeoTIFF https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9753/supplemental/Colville_Data_Report_2008.pdf Colville Data Report Online Resource pdf Data report from the contractor. Represents the data as delivered to USFS. Modifications have occurred to the data, as noted in this metadata. absolute accuracy RMSE = 0.08 feet (0.024 meters) standard deviation = 0.13 feet (0.04 meters) Note: These are the values from the data report. RMSE less than standard deviation does not make mathematical sense! Relative accuracy from examining overlapping flightlines has a standard deviation of 0.29 feet (0.09 meters). Given these inconsistencies, the true absolute accuracy is unclear and it may be safer to use a value on the order of 0.10 meters. 1 The LiDAR survey utilized a Leica ALS50 Phase II sensor mounted in a Cessna Caravan 208B. The Leica ALS50 Phase II system was set to acquire greater than 105,000 laser pulses per second (i.e. 105 kHz pulse rate) and flown at 900 meters above ground level (AGL), capturing a scan angle of ±14 degrees from nadir (see Table 2.1). These settings are developed to yield points with an average native pulse density of 8 points per square meter over terrestrial surfaces. Some types of surfaces (i.e., dense vegetation or water) may return fewer pulses than the laser originally emitted. Therefore, the delivered density can be less than the native density and vary according to distributions of terrain, land cover, and water bodies. The study area was surveyed with opposing flight line side-lap of at least 50% (100% overlap) to reduce laser shadowing and increase surface laser painting. The system allows up to four range measurements per pulse, and all discernable laser returns were processed for the output dataset. 2008-09-05T00:00:00 2 Point cloud data were classified for ground points by Watershed Sciences. Ground points were given a point class of two (2) as specified by the LAS 1.1 format. Unclassified points were given a class of one (1). DEMs were created from the point clouds, though the interpolation method is not known. 3 DEM files were received by NOAA from US Forest Service in Washington State Plane North NAD83(HARN), NAVD88/Geoid03 as ESRI coverages. For ingest into the Digital Coast Data Access Viewer, the data were converted to Cloud Optimized GeoTiff format and appropriate EPSG codes were added. 2023-02-09T00:00:00 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 gov.noaa.nmfs.inport:69357 Kirk Waters 2023-02-23T20:18:06 SysAdmin InPortAdmin 2026-03-04T19:17:17 2024-01-10 OCM Partners OCMP 1002 Public No No 2023-02-09 3 Years 2026-02-09