50068
2008 US Army Corps of Engineers (USACE) National Coastal Mapping Program (NCMP) Topobathy Lidar - Illinois (Lake Michigan shoreline)
usace2008_gl_il_michigan_m563_metadata
Data Set
Published / External
49401
Lidar - partner (no harvest)
Project
Completed
2015-05-01
This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data. This data set is an LAZ (compressed LAS) format file containing LIDAR point cloud data. The data contained in these files contain hydrographic and topographic data collected by the CHARTS system along the Lake Michigan coast of Illinois from September 17 - September 26, 2008. These files contain topographic and bathymetric lidar data collected by the Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system. CHARTS integrates topographic and bathymetric lidar sensors, a digital camera, and a hyperspectral scanner on a single remote sensing platform for use in coastal mapping and charting activities. Data coverage generally extends along the coastline from the waterline inland 500 meters (topography) and offshore 1,000 meters or to laser extinction (bathymetry). The topographic lidar sensor has a pulse repetition rate of 9 kHz at 1064 nm (near-infrared wavelength). The bathymetric lidar sensor has a pulse repetition rate of 1 kHz at 532 nm (green wavelength). Native lidar data is not generally in a format accessible to most Geographical Information Systems (GIS). Specialized in-house and commercial software packages are used to process the native lidar data into 3-dimensional positions that can be imported into GIS software for visualization and further analysis. The data were collected and provided in decimal degrees of latitude and longitude, referenced to the North American Datum of 1983 (NAD83). Vertical positions were referenced to the NAD83 ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID03 model was used to transform the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). For data storage and provisioning purposes, the NOAA Office for Coastal Management converted the data from NAVD88 heights to ellipsoid heights using GEOID03.
Additionally, the data were unclassified when received; NOAA OCM classified the topo laser data as 1 and the bathy laser data as 11. Upland bathy laser points were reclassed to unclassified points (1). Classifications for ground (2), vegetation (3,4,5), and buildings (6) were subsequently done using only the unclassified (1) points.
These data were collected as a part of the NCMP to depict the elevations ABOVE AND BELOW the water for the First Return OR Last Return OR Hydro in the Illinois coastal zone.
10712
A footprint of this data set may be viewed in Google Earth at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/563/supplemental/2008_USACE_Great_Lakes_TopoBathy_Lidar_Illinois_Lake_Michigan.kmz
Theme
ISO 19115 Topic Category
elevation
Theme
006
Theme
014
Theme
ASCII XYZ
Theme
CHARTS
Theme
JALBTCX
Theme
SHOALS
Theme
U.S. Army Corps of Engineers
Theme
oceans
Temporal
2008
Temporal
September
Office for Coastal Management
Charleston
SC
Data Set
As Needed
Point
LAS classes 1,13
Any conclusions drawn from the analysis of this information are not the responsibility of JALBTCX, the Office for Coastal Management or its partners.
Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) would be appreciated in any publications
or derived products.
Data Steward
2015-05-01
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
2015-05-01
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
2015-05-01
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
2015-05-01
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
-87.857701
-87.497004
42.49646
41.686281
Range
2008-09-17
2008-09-26
Yes
Unclassified
This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=563;
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.
2014-01-09
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=563
2015-05-01
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
2014
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/563/index.html
2015-05-01
Organization
NOAA Office for Coastal Management
Bulk Download
Simple download of data files. This is an orthometric version with a geoid model applied. The geoid model name is embedded in the URL.
LAZ
LAS/LAZ - LASer
Zip
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/563/supplemental/2008_USACE_Great_Lakes_TopoBathy_Lidar_Illinois_Lake_Michigan.kmz
Coverage KMZ
Browse Graphic
KMZ
A footprint of this data set that may be viewed in Google Earth
2016-05-23
Date that the source FGDC record was last modified.
2017-11-14
Converted from FGDC Content Standard 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 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.6.1500
These data are not attributed. | Quantitative Value: N/A | Quantitative Test Explanation: These data are not attributed.
The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 0.75 meters.; Quantitative Value: 0.75 meters, Test that produced the value: 1 Sigma
The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.20 meters.; Quantitative Value: 0.20 meters, Test that produced the value: 1 Sigma
Not Provided
The data provided in this file were tested against ground truth data. At these locations the lidar data matched within 0.20 meters, and
different flight line data agreed within 0.20 meters.
The US Army Corps of Engineers flew the SHOALS sensor along the shore of Lake Michigan and produced an ASCII data set with the green (bathy) and infra-red (topo) data separated. NOAA converted the data to LAS format, assigning different classes based on the laser. The data was further converted to ellipsoid heights as the standard for the Data Access Viewer. The topo data was classified for ground, buildings, and vegetation using automated tools.
ASCII lidar point cloud
Organization
US Army Corps of Engineers
Originator
1
These data were collected using the CHARTS system. It is owned by the Naval Oceanographic Office and operated through contract.
The system collects topographic lidar data at 9 kHz, bathymetric lidar data at 1 kHz and RGB imagery at 1Hz. A CASI-1500 hyperspectral line
scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination
of Novatel and POS A/V 410 equipment. All raw data streams are transferred to the office for downloading and processing in SHOALS GCS
software. Aircraft position data are processed using POSPac software and the results are combined with the lidar data to produce 3-D
positions for each lidar shot. Upon inspection and QA/QC in the software packages Fledermaus and PFM_ABE, anomalous data are flagged as
invalid. PFM_ABE's chartsLAS module then converts all valid data from ellipsoid to orthometric heights based on the NGS' GEOID03 model and
exports data as a series of first return topography (TF), last return topography (TL) and bathymetry (H) ASCII files. The bathymetry
files contain all of the returns from the bathymetric sensor which include returns both above and below the water.
2009-01-01T00:00:00
2
The NOAA Office for Coastal Management (OCM) received the data as unclassified files in ASCII format. The files contained LiDAR intensity and
elevation measurements. OCM performed the following processing on the data for data storage and Digital Coast provisioning:
1. The data were converted from ASCII to las format.
2. The data were classified as 1 for the topo data (no bare earth) using the topo last (TL) elevation and 11 for the hydro data.
3. The data were converted from NAVD88 heights to ellipsoid heights using Geoid03.
4. The LAS header fields were sorted by latitude and updated.
2011-02-01T00:00:00
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
ASCII lidar point cloud
3
Times had originally been stored as POSIX seconds when converted to LAS. This was switched to adjusted GPS time (GPS seconds - 1e9) to conform to the LAS 1.2 standard.
2014-01-09T00:00:00
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
4
The point cloud was classified using LAStools. Class 11 points (representing returns from the green laser) were ignored for the classification. Steps included:
1) ground classification using lasground_new
2) height above ground determination with lasheight
3) vegetation and building classification with lasclassify -step 4
Data were converted to utm before classification and back to geographic after classification. No manual corrections of classification artifacts or errors was done. Some issues were noted, particularly with the vegetation and building classifications. Those classes should be used with caution.
2022-07-26T00:00:00
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:50068
Anne Ball
2017-11-15T15:24:05
SysAdmin InPortAdmin
2023-10-17T16:12:16
2022-03-16
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16