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Short Citation:
OCM Partners, 2022: 2008 US Army Corps of Engineers (USACE) National Coastal Mapping Program (NCMP) Topobathy Lidar - Illinois (Lake Michigan shoreline), https://www.fisheries.noaa.gov/inport/item/50068.

Item Identification

Title: 2008 US Army Corps of Engineers (USACE) National Coastal Mapping Program (NCMP) Topobathy Lidar - Illinois (Lake Michigan shoreline)
Short Name: usace2008_gl_il_michigan_m563_metadata
Status: Completed
Publication Date: 2015-05-01
Abstract:

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.

Purpose:

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.

Notes:

10712

Supplemental Information:

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

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None 006
None 014
None ASCII XYZ
None CHARTS
None JALBTCX
None oceans
None SHOALS
None U.S. Army Corps of Engineers

Temporal Keywords

Thesaurus Keyword
UNCONTROLLED
None 2008
None September

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
Entity Attribute Overview:

Point

Entity Attribute Detail Citation:

LAS classes 1,13

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: 689066
Date Effective From: 2015-05-01
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: 689068
Date Effective From: 2015-05-01
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: 689069
Date Effective From: 2015-05-01
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: 689067
Date Effective From: 2015-05-01
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: 1139053
W° Bound: -87.857701
E° Bound: -87.497004
N° Bound: 42.49646
S° Bound: 41.686281

Extent Group 1 / Time Frame 1

CC ID: 1139052
Time Frame Type: Range
Start: 2008-09-17
End: 2008-09-26

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/#/lidar/search/where:ID=563;

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: 742878
Start Date: 2014-01-09
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=563
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2015-05-01 - Present)
File Name: Customized Download
Description:

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

File Type: Zip

Distribution 2

CC ID: 742879
Start Date: 2014
End Date: Present
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/563/index.html
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2015-05-01 - Present)
File Name: Bulk Download
Description:

Simple download of data files. This is an orthometric version with a geoid model applied. The geoid model name is embedded in the URL.

File Type: LAZ

URLs

URL 1

CC ID: 1178969
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/563/supplemental/2008_USACE_Great_Lakes_TopoBathy_Lidar_Illinois_Lake_Michigan.kmz
Name: Coverage KMZ
URL Type:
Browse Graphic
File Resource Format: KMZ
Description:

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

Activity Log

Activity Log 1

CC ID: 689099
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 689098
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: 718672
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 742880
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 2; ESRI ArcCatalog 9.2.6.1500

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 meters.; 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 meters.; Quantitative Value: 0.20 meters, Test that produced the value: 1 Sigma

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

Lineage Statement:

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.

Sources

ASCII lidar point cloud

CC ID: 1178970
Contact Role Type: Originator
Contact Type: Organization
Contact Name: US Army Corps of Engineers

Process Steps

Process Step 1

CC ID: 1139048
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 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.

Process Date/Time: 2009-01-01 00:00:00

Process Step 2

CC ID: 1139049
Description:

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.

Process Date/Time: 2011-02-01 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov
Source: ASCII lidar point cloud

Process Step 3

CC ID: 1139050
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
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov

Process Step 4

CC ID: 1178968
Description:

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.

Process Date/Time: 2022-07-26 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov

Catalog Details

Catalog Item ID: 50068
GUID: gov.noaa.nmfs.inport:50068
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