49740 hi2000_usace_hawaii_m1458_metadata Data Set Published / External 49401 Lidar - partner (no harvest) Project Completed 2013-03 These data were collected by the SHOALS (Scanning Hydrographic Operational Airborne Lidar Survey) system which consists of an airborne laser transmitter/receiver capable of measuring 400 soundings per second. The system operates from a deHavilland DHC-6 Twin Otter flying at altitudes between 200 and 400 meters with a ground speed of about 100 knots. The SHOALS system also includes a ground-based data processing system for calculating acurate horizontal position and water depth. Lidar is an acronym for LIght Detection And Ranging. The system operates by emitting a pulse of light that travels from an airborne platform to the water surface where a small portion of the laser energy is backscattered to the airborne receiver. The remaining energy at the water's surface propogates through the water column and reflects off the sea bottom and back to the airborne detector. The time difference between the surface return and the bottom return corresponds to water depth. The maximum depth the system is able to sense is related to the complex interaction of radiance of bottom material, incident sun angle and intensity, and the type and quantity of organics or sediments in the water column. As a rule-of-thumb, the SHOALS system should be capable of sensing bottom to depths equal to two or three times the Secchi depth. Original contact information: Contact Org: U.S. Army Corps of Engineers JALBCTX Phone: 251-690-3467 The purpose of the survey was to collect and map data from the shoreline to -30m depths. 10384 A footprint of this data set may be viewed in Google Earth at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/mllw/1458/supplemental/hi2000_usace_footprint.kmz Theme ISO 19115 Topic Category elevation Theme Hydrographic Survey Office for Coastal Management Charleston SC Data Set As Needed las LiDAR points in LAS 1.2 format none Any conclusions drawn from the analysis of this information are not the responsibility of JALBCTX, NOAA, the Office for Coastal Management or its partners. U.S. Army Engineer Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBCTX) Data Steward 2013-03 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 2013-03 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 2013-03 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 2013-03 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 -158.275 -154.803683 21.718898 18.90012 Discrete 2000-11 Yes Unclassified This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1458 ; 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. These data depict the heights at the time of the survey and are only accurate for that time. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1458 2013-03 Organization NOAA Office for Coastal Management Customized Download Create custom data files by choosing data area, product type, map projection, file format, datum, etc. Zip Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/mllw/1458/index.html 2013-03 Organization NOAA Office for Coastal Management Bulk Download Simple download of data files. LAZ LAS/LAZ - LASer Zip https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/mllw/1458/supplemental/hi2000_usace_footprint.kmz Browse Graphic Browse Graphic kmz This graphic shows the lidar coverage for coastal regions of Oahu, Moloka'i, Lana'i and Hawaii (Big Island) in the state of Hawaii. https://coast.noaa.gov Online Resource https://coast.noaa.gov/dataviewer Online Resource 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. SHOALS has demonstrated capabilities that meet US Army Corps of Engineers Hydrographic Survey accuracy requirements for Class 1 surveys and the International Hydrographic Organization nautical charting standards for Order 1. +/- 3 meters (1 sigma); Quantitative Value: 3.0 meters, Test that produced the value: Not tested, compiled to meet value (meters) at 1 sigma (1 standard deviation). +/- 15 cm (1 sigma); Quantitative Value: 0.15 meters, Test that produced the value: Collected to meet value (meters) at 1 sigma (1 standard deviation) N/A N/A 1 The SHOALS airborne system acquires a tremendous volume of raw data during a single mission. The lidar data are unique and require a specialized Data Processing System (DPS) for post-processing. The DPS main funcions 1) import airborne data stored on high density data tape; 2) perform quality control checks on initial depths and horizontal positions; 3) provide display and edit capabilities; 4) calculate depth and position (XYZ) values for each sounding; and 5) output final positions and depths for each sounding. 2000-12-01T00:00:00 2 The NOAA Office for Coastal Management (OCM) received topographic files in ASCII format. The files contained bathymetric depth measurements. Some sections of the data were received in NAD27 Hawaii State Plane (various zones), other sections were received in NAD27 UTM Zones 4 and 5. The data were vertically referenced to MLLW (feet or meters). OCM performed the following processing for data storage and Digital Coast provisioning purposes: 1. The topographic las files were converted from Projected coordinates (State Plane or UTM) to Geographic coordinates. 2. If the vertical units were feet they were converted to meters. 3. The data were converted from ASCII to LAS V1.2 4. All points were classified to Class 11 (Bathymetry). 2012-01-01T00:00:00 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:49740 Anne Ball 2017-11-15T15:21:59 SysAdmin InPortAdmin 2023-10-17T16:12:16 2022-03-16 OCM Partners OCMP 1002 Public No No 2022-03-16 1 Year 2023-03-16