69264 2012 Colville lidar m9754 Data Set Published / External 49401 Lidar - partner (no harvest) Project Completed 2012-11-26 2023-02-10 Light Detection and Ranging data (lidar) of the Colville National Forest Study Area. The requested lidar area of interest (AOI) totals approximately 400 square miles, or 256,155 acres. This area was buffered to ensure data coverage, resulting in a total area flown (TAF) of 282,901 acres. Provide a lidar point cloud 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_v12.pdf US Forest Service; Watershed Sciences, Inc. 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 -118.89 -118.36 49.01 48.5114 Range 2012-10-03 2012-10-09 Airborne lidar collection period. .6 Meter Yes Yes 4692951642 Geographic 3D EPSG:6319 NAD83(2011) NAD83 (National Spatial Reference System 2011) GRS 1980 6378137 298.257222101 1 Geodetic Latitude Lat degree north 2 Geodetic Longitude Lon degree east 3 Elipsoidal height h metre up Unclassified None None None None https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9754 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.amazonaws.com/laz/geoid18/9754/index.html 2023-02-09 Organization Office for Coastal Management https://ror.org/05v14bq57 Bulk download of files. These are in orthometric NAVD88 vertical datum. LAZ LAS/LAZ - LASer Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9754/supplemental/Technical_Data_Report_Colville.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. The report also describes imagery products that NOAA did not receive. absolute accuracy RMSE = 0.05 meters standard deviation = 0.05 meters Based on checkpoint data. No independent survey data were collected. This is "compiled to meet" in accordance with ASPRS guidelines. Classified point cloud Organization USFS Originator 1 Airborne acquisition was conducted between 10:00am and 2:00pm each day. The LiDAR survey utilized a Leica ALS50 sensor mounted in a Cessna Caravan. The system was set to acquire greater than 114,600 laser pulses per second and flown at 2000 meters above ground level (AGL), capturing a scan angle of ±14 degrees from nadir. These settings are developed to yield points with an average native pulse density of 2 points per square meter over terrestrial surfaces. Aircraft position was measured twice per second (2 Hz) by an onboard differential GPS unit. Aircraft attitude is described as pitch, roll, and yaw (heading) and was measured 200 times per second (200 Hz) from an onboard inertial measurement unit (IMU). The study area was surveyed with opposing flight line side-lap of at least 60% (greater than 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. 2012-10-09T00:00:00 2 Resolve GPS kinematic corrections for aircraft position data using kinematic aircraft GPS (Collected at 2 Hz) and static ground GPS (1 Hz) data collected over geodetic controls using POSGNSS v. 5.3, Trimble Business Center v. 2.81, PosPacMMS v 5.4 Develop a smoothed best estimate of trajectory (SBET) file that blends post-processed aircraft position with attitude data. Sensor heading, position, and attitude are calculated throughout the survey using POSGNSS v. 5.3, PosPacMMS v5.4 Calculate laser point position by associating SBET information to each laser point return time, with offsets relative to scan angle, intensity, etc. included. This process creates the raw laser point cloud data for the entire survey in *.las (ASPRS v1.2) format, in which each point maintains the corresponding scan angle, return number (echo), intensity, and x, y, z information. These data are converted to orthometric elevation (NAVD88) by applying a Geoid 12 correction using OPTECH LiDAR Mapping Suite (LMS) v. 2.1 Import raw laser points into subset bins (less than 500 MB, to accommodate file size constraints in processing software). Filter for noise and perform manual relative accuracy calibration. Ground points are then classified for individual flight lines to be used for relative accuracy testing and calibration using TerraScan v.12, Custom Watershed Sciences software Test relative accuracy using ground classified points per each flight line. Perform automated line-to-line calibrations for system attitude parameters (pitch, roll, heading), mirror flex (scale) and GPS/IMU drift. Calibrations are performed on ground classified points from paired flight lines. Every flight line is used for relative accuracy calibration using TerraMatch v.12, TerraScan v.12, Custom Watershed Sciences software. Assess Fundamental vertical accuracy via direct comparisons of ground classified points to ground RTK survey data with TerraScan v.12 2012-11-20T00:00:00 3 Classified point clouds were received by NOAA from US Forest Service in NAD83(2011) UTM zone 11 meters, NAVD88/Geoid12. For ingest into the Digital Coast Data Access Viewer, the data were converted to geographic coordinates and the geoid model was removed. 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 Classified point cloud gov.noaa.nmfs.inport:69264 Kirk Waters 2023-02-10T13:34:29 SysAdmin InPortAdmin 2026-08-19T18:33:57 2023-02-14 OCM Partners OCMP 1002 Public No No 2023-02-09 3 Years 2026-02-09