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Short Citation:
OCM Partners, 2022: 2008 USACE Great Lakes Topo/Bathy Lidar: Lake Huron, Michigan, https://www.fisheries.noaa.gov/inport/item/50071.

Item Identification

Title: 2008 USACE Great Lakes Topo/Bathy Lidar: Lake Huron, Michigan
Short Name: usace2008_mi_huron_m587_metadata
Status: Completed
Publication Date: 2011-07
Abstract:

These files contain topographic and bathymetric lidar data collected by the Compact Hydrographic Airborne Rapid Total Survey (CHARTS)

system along the Lake Huron coast of Michigan in Huron, Sanilac, and St. Clair Counties during August 12-17, 2008. 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. Horizontal

positions, provided in decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 (NAD83). Vertical positions

are referenced to the NAD83 ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID03 model is used to transform

the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). Upon receipt at

the NOAA Office for Coastal Management, the data were converted to las format and to ellipsoid heights using GEOID03 for data storage and Digital Coast

provisioning purposes. Additionally, the bathymetric lidar data points were classified according to the ASPRS LAS 1.2 classification scheme as

11 (bathymetry) and the topographic last return lidar data points were classified as 1 (unclassified).

Original contact information:

Contact Org: JALBTCX

Title: Data Production Manager

Phone: 228-252-1111

Email: shoals-info@sam.usace.army.mil

Purpose:

These data were collected as a part of the NCMP (National Coastal Mapping Program) to depict the elevations ABOVE AND/OR BELOW the water

for the First Return OR Last Return OR Hydro in the Michigan coastal zone.

Notes:

10715

Supplemental Information:

Sensor malfunction in the survey area hindered the acquisition of bathymetric data in boxes 08, 09, 10, and 11 which and resulted in

incomplete coverage.

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/587/supplemental/2008_USACE_Great_Lakes_TopoBathy_Lidar_Michigan_Lake_Huron.kmz

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None ASCII XYZ
None CHARTS
None JALBTCX
None SHOALS
None U.S. Army Corps of Engineers

Temporal Keywords

Thesaurus Keyword
UNCONTROLLED
None 2008
None August

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
Geographic Names Information System Bay City
Geographic Names Information System Huron County
Geographic Names Information System Michigan
Geographic Names Information System Port Huron
Geographic Names Information System Saint Clair County
Geographic Names Information System Sanilac County
Geographic Names Information System United States

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of JALBTCX, the

Office for Coastal Management or its partners.

Data Set Credit: Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products.

Support Roles

Data Steward

CC ID: 689189
Date Effective From: 2011-07
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 689191
Date Effective From: 2011-07
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 689192
Date Effective From: 2011-07
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 689190
Date Effective From: 2011-07
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1139418
W° Bound: -82.880709
E° Bound: -82.413509
N° Bound: 44.057515
S° Bound: 42.999615

Extent Group 1 / Time Frame 1

CC ID: 1139417
Time Frame Type: Range
Start: 2008-08-12
End: 2008-08-17

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer;

Data Access Constraints:

None

Data Use Constraints:

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.

Distribution Information

Distribution 1

CC ID: 742889
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=587
Distributor:
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 742890
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/587/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

Activity Log

Activity Log 1

CC ID: 689216
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 689215
Activity Date/Time: 2017-11-14
Description:

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.

Activity Log 3

CC ID: 718675
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 742891
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 1; ESRI ArcCatalog 9.3.1.1850

Data Quality

Accuracy:

These data are not attributed. | Quantitative Value: N/A | Quantitative Test Explanation: These data are not attributed.

Horizontal Positional Accuracy:

The data positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 0.75 m.; Quantitative Value: 0.75 meters, Test that produced the value: 1 Sigma

Vertical Positional Accuracy:

The data positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.20 m.; Quantitative Value: 0.20 meters, Test that produced the value: 1 Sigma

Completeness Measure:

Cloud Cover: Unknown

Completeness Report:

Not provided

Conceptual Consistency:

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.

Lineage

Process Steps

Process Step 1

CC ID: 1139413
Description:

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 1 Hz. 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.

Process Step 2

CC ID: 1139414
Description:

The NOAA Office for Coastal Management (OCM) received 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 purposes:

1. The data (topographic last return and hydrographic lidar points) were converted from ASCII format to las format.

2. The data were converted from NAVD88 heights to ellipsoid heights using GEOID03.

3. The hydrographic lidar data points were classified according to the ASPRS LAS 1.2 classification scheme as 11 (bathymetry) and the

topographic last return lidar data points were classified as 1 (unclassified).

4. The LAS header fields were sorted by latitude and updated.

Process Date/Time: 2011-06-01 00:00:00

Process Step 3

CC ID: 1139415
Description:

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.

Process Date/Time: 2014-01-09 00:00:00

Catalog Details

Catalog Item ID: 50071
GUID: gov.noaa.nmfs.inport:50071
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:24+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16