2023 NOAA NGS Lidar: Long Island Sound, NY
NOAA Long Island Sound Topobathymetric Lidar data were collected by NV5 using Leica Chiroptera/Hawkeye 4X and Chiroptera/Hawkeye 5 systems in four blocks. Block01 was flown between 20230305 and 20230411 in 14 missions, block02 was flown between 20230305 and 20230722 in 23 missions, block03 was flown between 20230316 and 20231028 in 13 missions and block04 was flown between 20230410 and 20230530 in 19 missions.
All data in each block includes topobathymetric data in a LAS format 1.4, point data record format 6, with the following classifications in accordance with project specifications and the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards:
1 - Unclassified
1W - Withheld - edge clip
1OW - Overlap Withheld - unrefracted green data from Chiroptera sensor
2 - Ground
7W - Withheld -low noise
18W - Withheld - high noise
40 - Bathymetric bottom or submerged topography
41 - Water surface
42S - Synthetic- Chiroptera synthetic water surface
43 - Submerged feature
45 - Water column
64 - Submerged Aquatic Vegetation (SAV)
65 - Overlap bathy bottom - temporally different from a separate lift
71 - Unclassified associated with areas of overlap bathy bottom/temporal bathymetric differences
72 - Ground associated with areas of overlap bathy bottom/temporal bathymetric differences
81 - Water surface associated with areas of overlap bathy bottom/temporal bathymetric differences
82S - Synthetic - Chiroptera synthetic water surface associated with areas of overlap bathy bottom/temporal bathymetric differences
85 - Water column associated with areas of overlap bathy bottom/temporal bathymetric differences.
The channel bits are mapped as the following:
0 - Chiroptera green shallow laser
1 - Chiroptera/Hawkeye synthetic water surface
2 - Hawkeye green deep laser
3 - Chiroptera NIR
The user byte is mapped as the following:
10 - Chiroptera green shallow
11 - Chiroptera green shallow 4X
12 - Chiroptera green shallow synthetic
20 - Hawkeye green deep
21 - Hawkeye green deep 4X
22 - Hawkeye green deep synthetic
30 - Chiroptera NIR
This dataset also includes lidar intensity values, number of returns, return number, time, and scan angle.
After each initial Long Island Sound Topobathymetric Lidar block Delivery submission, NOAA reviewed the data and provided NV5 with a feedback edit review. NV5 has corrected these feedback edits and incorporated them into the final block datasets . Additionally, green laser intensity values were normalized for depth resulting in a full redelivery of all LAS files in block02 and block04. LAS files were compiled in 500 m x 500 m tiles.
Complete Metadata
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|---|---|
| accessLevel | non-public |
| contactPoint |
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| description | NOAA Long Island Sound Topobathymetric Lidar data were collected by NV5 using Leica Chiroptera/Hawkeye 4X and Chiroptera/Hawkeye 5 systems in four blocks. Block01 was flown between 20230305 and 20230411 in 14 missions, block02 was flown between 20230305 and 20230722 in 23 missions, block03 was flown between 20230316 and 20231028 in 13 missions and block04 was flown between 20230410 and 20230530 in 19 missions. All data in each block includes topobathymetric data in a LAS format 1.4, point data record format 6, with the following classifications in accordance with project specifications and the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards: 1 - Unclassified 1W - Withheld - edge clip 1OW - Overlap Withheld - unrefracted green data from Chiroptera sensor 2 - Ground 7W - Withheld -low noise 18W - Withheld - high noise 40 - Bathymetric bottom or submerged topography 41 - Water surface 42S - Synthetic- Chiroptera synthetic water surface 43 - Submerged feature 45 - Water column 64 - Submerged Aquatic Vegetation (SAV) 65 - Overlap bathy bottom - temporally different from a separate lift 71 - Unclassified associated with areas of overlap bathy bottom/temporal bathymetric differences 72 - Ground associated with areas of overlap bathy bottom/temporal bathymetric differences 81 - Water surface associated with areas of overlap bathy bottom/temporal bathymetric differences 82S - Synthetic - Chiroptera synthetic water surface associated with areas of overlap bathy bottom/temporal bathymetric differences 85 - Water column associated with areas of overlap bathy bottom/temporal bathymetric differences. The channel bits are mapped as the following: 0 - Chiroptera green shallow laser 1 - Chiroptera/Hawkeye synthetic water surface 2 - Hawkeye green deep laser 3 - Chiroptera NIR The user byte is mapped as the following: 10 - Chiroptera green shallow 11 - Chiroptera green shallow 4X 12 - Chiroptera green shallow synthetic 20 - Hawkeye green deep 21 - Hawkeye green deep 4X 22 - Hawkeye green deep synthetic 30 - Chiroptera NIR This dataset also includes lidar intensity values, number of returns, return number, time, and scan angle. After each initial Long Island Sound Topobathymetric Lidar block Delivery submission, NOAA reviewed the data and provided NV5 with a feedback edit review. NV5 has corrected these feedback edits and incorporated them into the final block datasets . Additionally, green laser intensity values were normalized for depth resulting in a full redelivery of all LAS files in block02 and block04. LAS files were compiled in 500 m x 500 m tiles. |
| distribution |
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|
| identifier | gov.noaa.nmfs.inport:74869 |
| issued | 2025-01-01T00:00:00.000+00:00 |
| keyword |
[
"EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS",
"EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY > COASTAL BATHYMETRY",
"EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION",
"CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > CONNECTICUT",
"CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > NEW YORK",
"LIDAR > Light Detection and Ranging",
"Airplane > Airplane",
"DOC/NOAA/NOS/NGS > National Geodetic Survey, National Ocean Service, NOAA, U.S. Department of Commerce",
"NGS Lidar"
]
|
| landingPage | https://www.fisheries.noaa.gov/inport/item/74869 |
| language |
[]
|
| license | https://creativecommons.org/publicdomain/zero/1.0/ |
| modified | 2025-01-01T00:00:00.000+00:00 |
| publisher |
{
"name": "National Geodetic Survey",
"@type": "org:Organization"
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|
| references |
[
"https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ngs/dmp/pdf/74869.pdf"
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|
| rights | otherRestrictions, unclassified |
| spatial | -72.9,40.73,-73.93,41.32 |
| temporal | 2023-03-05T00:00:00+00:00/2023-07-22T00:00:00+00:00 |
| title | 2023 NOAA NGS Lidar: Long Island Sound, NY |
