53623 ak2013_vallenar_m8595_metadata Data Set Published / External 49401 Lidar - partner (no harvest) Project Completed 2013-09-12 The University of Alaska Fairbanks, Geographic Information Network of Alaska (UAF/GINA) provided Aero-Metric, Inc. (AeroMetric) and Watershed Sciences, Inc. (WSI) with detailed specifications for this project in the spring of 2013. Planning and acquisition of airborne LiDAR data was carried out by WSI in early May of 2013. This delivery contains point cloud data in LAS 1.2 format classified in the following manner: Class 1: Unclassified Class 2: Bare Earth Ground Class 3: Low Vegetation (vegetation within 12 inches of the ground surface) Class 4: Medium Vegetation (vegetation greater than 12 inches, but less than 36 inches above the ground surface) Class 5: High Vegetation (vegetation greater than 36 inches above the ground surface) Class 6: Buildings Class 7: Noise Class 8: Ground Model Keypoints Class 9: Water Class 10: Breakline Proximity Class 14: Bridge Decks The following are the collection parameters and equipment used to create these data sets: Aircraft: Cessna Caravan (N604MD) LiDAR System: Leica ALS60 Approximate Collection Altitude (Above Mean Terrain): 900 meters Ground Speed: 160 kts Pulse Rate Frequency: 98-106 kHz Mirror Scan Frequency: 66 Hz Scan Angle (+/-): 14 degrees Accuracy statements are based on areas of moderate terrain, with points classified as ground. Diminished accuracies are to be expected in areas of extreme terrain and dense vegetation. The accuracy of each point is expected to meet the vertical accuracy standard, derived products may be less accurate in areas of extreme terrain and dense vegetation due to a lesser number of points defining the ground in these areas. Classified data sets such as this one may have varying posting due to some pulses not reaching the ground. The NOAA Office for Coastal Management (OCM) downloaded this lidar data from the AK DGGS site (https://elevation.alaska.gov/) and processed the data to be available on the Digital Coast Data Access Viewer (DAV). OCM processed all points to the Digital Coast Data Access Viewer (DAV). The purpose of this data set is to provide LiDAR-derived topographic data for transportation planning and road construction. 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 > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION Theme ISO 19115 Topic Category elevation Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA 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 Theme Terrain Theme beach Theme erosion Office for Coastal Management Charleston SC Data Set Elevation None Planned Point Cloud (digital) AeroMetric assumes no liability for the data being used for purposes other than stated in this document. Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners. AeroMetric, Watershed Sciences, Inc. Data Steward 2018 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 2018 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 Metadata Contact 2018 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 2018 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 -131.851962111 -131.724883444 55.410482472 55.312103583 Discrete 2013-05-07 Unclassified Data is available online for custom and bulk 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=8595 Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. A new metadata will be produced to reflect your request using this record as a base. Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8595/index.html Bulk Download Bulk download of data files in LAZ format, geographic coordinates, orthometric heights. Note that the vertical datum (hence elevations) of the files here are different than described in this document. LAZ LAS/LAZ - LASer Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8595/supplemental/ak2013_vallenar.kmz Browse graphic Browse Graphic KML This graphic displays the footprint for this lidar data set. https://coast.noaa.gov/ NOAA's Office for Coastal Management (OCM) website Online Resource HTML Information on the NOAA Office for Coastal Management (OCM) 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://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/8595/supplemental/Vallenar_Bay_LiDAR_Processing_QAQC.pdf Dataset report Online Resource PDF Link to data set report. Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; LiDARTools 1.0.9 Data products collected were acquired at or below 900 meters above mean terrain (AMT) and have a horizontal accuracy of 0.2 meters or better (per manufacturers system specifications). The vertical accuracy of the Classified Bare Earth for Vallenar Bay is 0.275 US Survey Feet at a 95% confidence level (RMSE*1.96 (95% CI - NSSDA)) in the "Open Terrain" land cover category or 4.3 cm RMSE. 634 survey control points were used for the Vallenar Bay data. The Consolidated Vertical Accuracy is 0.45 US Survey Feet at the 95th Percentile, calculated using 762 check points. Supplemental Vertical Accuracies are as follows: Open-Logged : 0.66 US Survey Feet at the 95th Percentile Tall Grass : 1.12 US Survey Feet at the 95th Percentile Mixed Brush : 0.62 US Survey Feet at the 95th Percentile Mature Trees : 0.45 US Survey Feet at the 95th Percentile Small Trees : 1.8 US Survey Feet at the 95th Percentile Complete QAQC ground survey points were collected by SurvBase, LLC and supplied to Watershed Sciences, Inc. (WSI) 1 WSI created a smoothed-best estimated trajectory (SBET) of the sensor at a rate of 200 Hz, by integrating the airborne GPS and IMU data The basis of the GPS coordinates were two dual frequency GPS receivers, collecting data at a rate of 2 Hz operated by Aero-Metric during the acquisition phase of this project, and were referenced to NAD83 (CORS96) ellipsoid heights. 2013-05-31T00:00:00 10 The NOAA Office for Coastal Management (OCM) downloaded 32 laz files from the Alaska Division of Geological and Geophysical Surveys data Portal (https://elevation.alaska.gov/). The files contained classified elevation and intensity measurements for the 2013 Vallenar Bay data set. The data were in Alaska State Plane, Zone 5001 coordinates (NAD83 2011, US survey feet) and NAVD88 elevations (GEOID12A) in feet. The data were classified: Class 1: Unclassified, Class 2: Bare-earth ground, Class 3: Low vegetation, Class 4: Medium Vegetation, Class 5: High Vegetation, Class 6_ Buildings, Class 7: Noise, Class 8: Ground Model Keypoints, Class 9: Water, Class 10: Breakline Proximity, Class 14: Bridge Decks. Low vegetation is defined in the report as vegetation within 12 inches of the ground surface, medium vegetation as vegetation greater than 12 inches, but less than 36 inches above the ground surface and high vegetation as vegetation greater than 36 inches above the ground surface. OCM processed all points to the Digital Coast Data Access Viewer (DAV). OCM performed the following processing on the data for Digital Coast storage and provisioning purposes: 1. The LAStools software scripts lasinfo and lasvalidate were run on the laz files to check for errors. 2. An internal OCM script was run to check the number of points by classification and by flight ID and the gps times and intensity ranges. 3. Internal OCM scripts were run on the laz files to convert from Alaska State Plane, Zone 5001 coordinates to geographic coordinates, to convert from NAVD88 elevations to ellipsoid elevations using the GEOID12A model, to convert from feet to meters, to assign the geokeys, to assign a lidar domain profile, to sort the data by gps time and zip the data to database and to http. 2018-09-10T00:00:00 Organization Office for Coastal Management OCM https://ror.org/05v14bq57 2234 South Hobson Avenue Charleston SC 29405-2413 https://www.coast.noaa.gov/ 2 WSI integrated SBET and raw laser data to produce point cloud data in LAS 1.2 format for each flight line. 2013-06-03T00:00:00 3 WSI processed data calibration: An in-situ calibration was performed using the data collect for this project. The data was classified in each line separately for ground and other common features between lines, such as building roofs. This data was processed in TerraMatch 11.001 (TerraSolid, Ltd.), to compute corrections for roll, pitch, heading, and mirror scale. These corrections are applied in order to minimize discrepancies between flight lines. 2013-06-12T00:00:00 4 WSI automated classification of the bare-earth data from the LiDAR point cloud using a series of algorithms customized for the types of terrain encountered in the project. 2013-06-13T00:00:00 5 WSI manually classified any data which appears to be improperly classified using the automated methods. 2013-06-20T00:00:00 6 WSI provided AeroMetric with calibrated, vertically adjusted, and classified LiDAR data in the Vallenar Bay area. 2013-06-25T00:00:00 7 AeroMetric completed a series of evaluations including verifying density requirements, confirming relative and absolute accuracies, reviewing coverage and classification's, and confirming the reproducibility of ranges within the LiDAR Data. 8 Due to tiling artifacts being identified in the low vegetation and high vegetations, using a automated method those classes were properly re-classified. 2013-09-09T00:00:00 9 Create point cloud data, by tile in LAS 1.2 format. gov.noaa.nmfs.inport:53623 Rebecca Mataosky 2018-09-10T11:35:05 SysAdmin InPortAdmin 2026-03-04T19:17:17 2022-03-16 OCM Partners OCMP 1002 Public No No 2022-03-16 1 Year 2023-03-16