48144 ak2011_matsu_m2609_metadata Data Set Published / External 37231 Lidar Project Completed 2012-06-27 The Matanuska Susitna Borough LiDAR/Imagery Project covers 3680 sq/mi of the Matanuska-Susitna Borough in Alaska. Project parnters and funding sources include: Coastal Impact Assistance Program, Alaska Industrial Development and Export Authority, Alaska Energy Authority, United States Geological Survey, Matanuska Susitna Borough, United States Army Corps of Engineers, United States Fish and Wildlife Service, The Nature Conservancy, National Oceanic and Atmospheric Administration, Mat-Su Salmon Partnership, and Alaska Pacific University. This dataset was originally in LAS 1.2 format with a non-standard class table. The format and the class table has been changed. Details are in the processing steps. The following are the collection parameters and equipment used to create these data sets. The Leica sensor was used for flights in the northern half of the Core Area. All other flights were flown with Optech sensors. Aircraft: Cessna 310(N7516Q), Piper Navajos (N6GR,T73TM and 812TB), Beechcraft KingAir (N898WW) Lidar Systems: Optech ALTM Gemini (03SEN145 and 07SEN201) and Leica ALS 70 Approximate Collection Altitude (Above Mean Terrain): Optech--1400 meters, Leica--2200 meters Ground Speed: Optech--150 kts, Leica--160 kts Pulse Rate Frequency: Optech--70 kHz, Leica--163.6 kHz Mirror Scan Frequency: Optech--40 Hz, Leica--41 Hz Scan Angle (+/-): Optech--17 degrees, Leica--16 Degrees Beam Divergence: Narrow (0.3 mrad) 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. Original contact information: Contact Name: Lidar Manager Contact Org: Aerometric, Inc. Title: Lidar Manager Phone: (907) 272-4495 Email: aerometric@aerometric-ak.com The purpose of this data set is to provide lidar-derived topographic data for the Matanuska-Susitna Borough. 10167 This data set was downloaded and modified from http://matsu.gina.alaska.edu. At the time of download, two small areas were not available and were listed for collection in 2012. A project summary can be found at http://matsu.gina.alaska.edu/Project%20Wide/Project%20Documentation/MSB%20LiDAR%20Imagery%20Project%20Summary.pdf Additional products are available through the matsu.gina.alaska.edu site, including general project information at: http://matsu.gina.alaska.edu/Project%20Wide/ Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION Theme ISO 19115 Topic Category elevation Theme ISO 19115 Topic Category oceans Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALASKA Theme Bare-Earth Theme Terrain Temporal 2011 Temporal 2012 Temporal August Temporal May Temporal October Stratum 2011 data from the Knik Glacier withheld from ground/vegetation classification due to movement. Stratum 2011 data from the Matanuska Glacier withheld from ground/vegetation classification due to movement. Stratum Class 14: Bridge Deck Stratum Class 15: Noise (unclassifed data 1 foot or less above ground) Stratum Class 16: Powerlines Stratum Class 18: May 24 Stratum Class 19: May 31 Stratum Class 1: Unclassified Stratum Class 2 with user byte 2: Breakline proximity ground points Stratum Class 26: May 13 Stratum Class 27: May 24 Stratum Class 28: August 26 Stratum Class 2: Ground Stratum Class 3: Low Vegetation (Less than 6 feet above ground surface) Stratum Class 4: Medium Vegetation (Between 6 and 15 feet above ground surface) Stratum Class 5: High Vegetation (More than 15 feet above ground surface) Stratum Class 6: Buildings Stratum Class 7: Error Points (Noise) Stratum Class 8: Contour Keypoints Stratum Class 9: Water Office for Coastal Management Charleston SC Data Set None Planned digital point data Any conclusions drawn from the analysis of this information are not the responsibility of Aerometric Inc., NOAA, the Office for Coastal Management or its partners. 49259 LAS Published / External Completed 'LAS 1.2' ASPRS binary data | Description Source: American Society for Photogrammetry and Remote Sensing Converted from FGDC using 'fgdc_to_inport_xml_entity.pl' script. Data Steward 2012-06-27 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 2012-06-27 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 2012-06-27 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 2012-06-27 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 -150.758042 -147.236006 62.900371 61.229401 Range 2011-05-10 2011-11-12 Yes Unclassified This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2609 ; Public None https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2609 2012-06-27 Organization NOAA Office for Coastal Management Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/2609/index.html 2012-06-27 Organization NOAA Office for Coastal Management Bulk Download Simple download of data files. These are orthometric heights. LAZ LAS/LAZ - LASer Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/2609/supplemental/ak2011_matsu_m2609.kmz Browse extent Browse Graphic kmz Graphic showing the data extent. http://matsu.gina.alaska.edu/Project%20Wide/ Project information Online Resource Directory of project information. https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/2609/supplemental/ak2011_matsu_m2609_qc_survey_report.pdf Survey Report Online Resource pdf Quality control survey report. 2016-05-23 Date that the source FGDC record was last modified. 2017-11-14 Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. 2018-02-08 Partial upload of Positional Accuracy fields only. 2018-03-13 Partial upload to move data access links to Distribution Info. Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; lidarTools 1.0.9 No horizontal accuracy verifications have been completed Accuracies by area: Core Area: Tested 0.176 meters fundamental vertical accuracy at 95 percent confidence level in open terrain using RMSEz x 1.9600. Tested 0.307 meters supplemental vertical accuracy at 95th percentile in developed areas. Tested 0.400 meters supplemental vertical accuracy at 95th percentile in forested areas. Tested 0.331 meters supplemental vertical accuracy at 95th percentile in shrub areas. Tested 0.618 meters supplemental vertical accuracy at 95th percentile in wetlands areas. Tested 0.322 meters consolidated vertical accuracy at 95th percentile in: open terrain, developed, forest, shrub and wetlands areas. Caswell Lakes: Data has not been verified using ground survey points. Matanuska: Data has not been verified using ground survey points. North Susitna: Data has not been verified using ground survey points. Point MacKenzie: Data has not been verified using ground survey points. Willow: Data has not been verified using ground survey points. Cloud Cover: 0 Not Complete Data has been verified using ground survey points collected by Lounsbury and Associates, Inc. and Aerometric, Inc. MatSu Point Clouds 2012-06-27 Range 2011-05-10 2011-11-12 Aerometric | Source Geospatial Form: digital point data | Type of Source Media: online 1 Create 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 provided to Aero-Metric by Lounsbury, Inc., and were referenced to NAD83 (CORS96) with GEOID09 derived orthometric heights. The maximum baseline distance for this area was 15 km, the average base line length was 5 km. The mean GPS positional accuracy for this area was +/- 0.06 meters. 2011-10-12T00:00:00 2 Integrate SBET and raw laser data to produce point cloud data in LAS 1.2 format for each flight line. 2011-10-12T00:00:00 3 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. 2011-10-12T00:00:00 4 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. 2011-12-12T00:00:00 5 Manual classification of any data which appears to be properly classified using the automated methods. 2012-04-15T00:00:00 6 Create point cloud data, by tile in LAS 1.2 format with absolute GPS timestamps 2012-11-20T00:00:00 7 Data for the MatSu Bugoughs was downloaded from matsu.gina.alaska.edu/LiDAR for all areas available 2013-11-26T00:00:00 8 Data were modified to work with the Digital Coast Data Access Viewer in the following ways: 1) projection was changed from Alaska State Plane to Geographic coordinates; 2) Vertical datum was changed from NAVD88 to NAD83 ellipsoid using NGS GEOID09; 3) the global encoding byte in LAS format was set to indicate adjusted GPS time instead of GPS seconds of the week; and 4) the classification table was modified to avoid classes already used as a standard within Digital Coast. The classification changes were for ground points near breaklines (original class 10 moved to class 2 with user byte set to 2), powerlines (original class 11 moved to class 16), and near ground noise (original class 13 moved to class 15). Data were also compressed to LAZ format using laszip from laszip.org. Data from multiple deliveries were combined and metadata rewritten to cover them all (Caswell Lakes, Core Area, Matanuska, North Susitna, Point MacKenzie, and Willow were the original delivery groups). 2013-12-18T00:00:00 9 The previous change in the classes was recognized as unhelpful as most software does not provide a way to segment data by the user bytes field for LAS data. Instead of moving the classes back to their original non-standard classes, they were moved to match the LAS1.4 standards as much as possible. This includes moving the points near a breakline to class 20. One class, noise within 1 foot of the ground, is non-standard and was moved to class 77 to conform with the LAS 1.4 requirement that classes below 64 are reserved for ASPRS. The LAS format was also promoted to LAS 1.4. The resulting class table is: classnumber classname 1 Unclassified 2 Ground 3 Low Vegetation 4 Medium Vegetation 5 High Vegetation 6 Building 7 Low Point (noise) 8 Reserved 9 Water 14 Wire-Conductor 17 Bridge Deck 20 Ignored Ground/Bathymetry 77 Near-Ground Noise 2021-06-22T00:00:00 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 MatSu Point Clouds 49259 Entity gov.noaa.nmfs.inport:48144 Anne Ball 2017-11-14T14:19:40 SysAdmin InPortAdmin 2023-10-17T16:12:14 2022-03-16 Office for Coastal Management OCM 1002 Public No No 2022-03-16 1 Year 2023-03-16