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Short Citation:
OCM Partners, 2024: 2012 USACE Great Lakes Topobathy Lidar: Lake Michigan, https://www.fisheries.noaa.gov/inport/item/49736.

Item Identification

Title: 2012 USACE Great Lakes Topobathy Lidar: Lake Michigan
Short Name: gl2012_usace_lakemichigan_m2644_metadata
Status: Completed
Publication Date: 2014-07-02
Abstract:

These files contain classified topographic and bathymetric lidar data as unclassified valid topographic data (1), valid topographic data classified as ground (2), invalid topographic data classified as lowpoints (7), valid bathymetric data (11), and valid topographic data acquired with the bathymetric sensor (14). Classes 1, 2, and 7 are defined in accordance with the American Society for Photogrammetry and Remote Sensing (ASPRS) classification standards, while classes 11 and 14 are classes specific to the NOAA Digital Coast Data Access Viewer (DAV).These data were collected with a RIEGL VQ-480 airborne lidar system along the Lake Michigan shoreline.

Data coverage generally extends along the shoreline from the waterline to 500 meters onshore. The VQ-480 sensor has a pulse repetition rate of 150 kHz at near infrared laser wavelength. Native lidar data are 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 exported to standard formats and imported into GIS software for visualization and further analysis. Horizontal positions, provided in Geographic Coordinates in decimal degrees, are referenced to the NAD83 (2011) Epoch 2010 datum. Vertical elevations in meters are also referenced to this datum (GRS80 ellipsoidal height). The 3-D position data are sub-divided into a series of LAS files. The National Geodetic Surveys (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). The 3-D position data are sub-divided into a series of LAS files, each covering approximately 5 kilometers of shoreline.

Note: The NOAA Office for Coastal Management was unable to determine the exact dates of collection due to corrupt GPS times in at least of the LAS files. Classifications listed from the original metadata above may have changed during processes at NOAA OCM.

Purpose:

These data were collected as a part of the NCMP to depict the elevations ABOVE AND/OR BELOW the water.

Notes:

10381

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/geoid18/2644/supplemental/gl2012_usace_lakemichigan_m2644.kmz

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation

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
Data Presentation Form: las
Entity Attribute Overview:

LiDAR points in LAZ format (Classes 1,2,7,9,11,14)

Entity Attribute Detail Citation:

none

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of USACE, JALBTCX, NOAA, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 674746
Date Effective From: 2014-07-02
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: 674748
Date Effective From: 2014-07-02
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: 674749
Date Effective From: 2014-07-02
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: 674747
Date Effective From: 2014-07-02
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: 1135254
W° Bound: -87.9458693
E° Bound: -84.6843231741
N° Bound: 46.1156698822
S° Bound: 41.5996674

Extent Group 1 / Time Frame 1

CC ID: 1135225
Time Frame Type: Discrete
Start: 2012-09-02

Extent Group 1 / Time Frame 2

CC ID: 1135226
Time Frame Type: Discrete
Start: 2012-09-03

Extent Group 1 / Time Frame 3

CC ID: 1135227
Time Frame Type: Discrete
Start: 2012-09-07

Extent Group 1 / Time Frame 4

CC ID: 1135228
Time Frame Type: Discrete
Start: 2012-09-08

Extent Group 1 / Time Frame 5

CC ID: 1135229
Time Frame Type: Discrete
Start: 2012-09-09

Extent Group 1 / Time Frame 6

CC ID: 1135230
Time Frame Type: Discrete
Start: 2012-09-10

Extent Group 1 / Time Frame 7

CC ID: 1135231
Time Frame Type: Discrete
Start: 2012-09-12

Extent Group 1 / Time Frame 8

CC ID: 1135232
Time Frame Type: Discrete
Start: 2012-09-13

Extent Group 1 / Time Frame 9

CC ID: 1135233
Time Frame Type: Discrete
Start: 2012-09-14

Extent Group 1 / Time Frame 10

CC ID: 1135234
Time Frame Type: Discrete
Start: 2012-09-23

Extent Group 1 / Time Frame 11

CC ID: 1135235
Time Frame Type: Discrete
Start: 2012-09-25

Extent Group 1 / Time Frame 12

CC ID: 1135236
Time Frame Type: Discrete
Start: 2012-09-26

Extent Group 1 / Time Frame 13

CC ID: 1135237
Time Frame Type: Discrete
Start: 2012-09-27

Extent Group 1 / Time Frame 14

CC ID: 1135238
Time Frame Type: Discrete
Start: 2012-09-28

Extent Group 1 / Time Frame 15

CC ID: 1135239
Time Frame Type: Discrete
Start: 2012-09-29

Extent Group 1 / Time Frame 16

CC ID: 1135240
Time Frame Type: Discrete
Start: 2012-10-01

Extent Group 1 / Time Frame 17

CC ID: 1135241
Time Frame Type: Discrete
Start: 2012-10-02

Extent Group 1 / Time Frame 18

CC ID: 1135242
Time Frame Type: Discrete
Start: 2012-10-03

Extent Group 1 / Time Frame 19

CC ID: 1135243
Time Frame Type: Discrete
Start: 2012-10-06

Extent Group 1 / Time Frame 20

CC ID: 1135244
Time Frame Type: Discrete
Start: 2012-10-15

Extent Group 1 / Time Frame 21

CC ID: 1135245
Time Frame Type: Discrete
Start: 2012-10-16

Extent Group 1 / Time Frame 22

CC ID: 1135246
Time Frame Type: Discrete
Start: 2012-10-17

Extent Group 1 / Time Frame 23

CC ID: 1135247
Time Frame Type: Discrete
Start: 2012-10-18

Extent Group 1 / Time Frame 24

CC ID: 1135248
Time Frame Type: Discrete
Start: 2012-10-19

Extent Group 1 / Time Frame 25

CC ID: 1135249
Time Frame Type: Discrete
Start: 2013-11-05

Extent Group 1 / Time Frame 26

CC ID: 1135250
Time Frame Type: Discrete
Start: 2013-11-06

Extent Group 1 / Time Frame 27

CC ID: 1135251
Time Frame Type: Discrete
Start: 2013-11-11

Extent Group 1 / Time Frame 28

CC ID: 1135252
Time Frame Type: Discrete
Start: 2013-11-18

Extent Group 1 / Time Frame 29

CC ID: 1135253
Time Frame Type: Discrete
Start: 2013-11-26

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=2644;

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. These data depict the heights at the time of the survey and are only accurate for that time.

Distribution Information

Distribution 1

CC ID: 741043
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2644
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: 741044
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2644/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741046
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741047
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 741048
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2644/supplemental/gl2012_usace_lakemichigan_m2644.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the coverage of the 2012 USACE Lake Michigan lidar.

Activity Log

Activity Log 1

CC ID: 674821
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 674820
Activity Date/Time: 2017-11-14
Description:

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.

Activity Log 3

CC ID: 718295
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741045
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

The data point positions were obtained using post processed KGPS methods. The horizontal accuracy of the data is better than +/- 0.50 m; Quantitative Value: 0.50 meters, Test that produced the value: RMSE 95% Conf. Units in meters.

Vertical Positional Accuracy:

The data point positions were obtained using post processed KGPS methods. The vertical accuracy of the data is better than +/- 0.15 m; Quantitative Value: 0.15 meters, Test that produced the value: RMSE 95% Conf. Units in meters.

Completeness Report:

This data set covers the spatial extent of bathymetric and topographic lidar data obtained during this survey.

Conceptual Consistency:

Differences between a DEM created from the lidar data representing bare ground and the ground truth point data is unbiased and within +/- 15 cm (RMSE) in flat terrain and within +/-30 cm

(RMSE) in hilly terrain

Lineage

Process Steps

Process Step 1

CC ID: 1135222
Description:

The flightline LAS files are imported into GeoCue [V7.0.3.5], which is a geospatial workflow production and management software tool employed by JALBTCX to perform and monitor production of data products. Upon import into GeoCue, the flightline LAS files are divided into a series of boxes, each of which are 1500 meters in length and width. A customized classification macro, built upon the TerraScan [V11] module within Microstation V8i, classifies valid topographic data as ground points (2) and unclassified points (1). Upon completion the macro, the classification results undergo quality control and any misclassified points are manually edited. In areas of dense vegetation the bare earth ground points might be incorrectly classified due to the inability of the laser to penetrate the canopy and reach the bare ground. In these areas, JALBTCX defaults to the algorithm ground surface instead of manually reclassifying those points. The final classification results are comprised of individual lidar points with classifications of ground (2) or unclassified (1). They are partitioned into a series of 5km delivery boxes, one Classified LAS file per box. The format of the file is LAS version [1.2]. Data are classified as 1 (valid non-ground topographic data), 2 (valid ground topographic data), 21 (valid topographic data acquired with the bathymetric sensor), 27 (invalid topographic and bathymetric data), 29 (valid bathymetric data)

Process Step 2

CC ID: 1135223
Description:

The NOAA Office for Coastal Management (OCM) received the topographic/bathymetric files in LAS format from USACE. The files contained lidar easting, northing, elevation, intensity, return number,

etc. Some GPS times in the LAS files appeared to be corrupt. the data was received in Geographic Coordinates (decimal degrees). The vertical coordinates were referenced to IGLD85 in meters.

using the Geoid03 model. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. Class 29 points (bathymetry) were reclassified to Class 11 (bathymetry).

2. Class 21 points (green topography) were reclassified to Class 14 (green topography).

3. Tile '2012_NCMP_MI_Michigan_05_Geoclassified_IGLD' was found to have erroneous points outside of the header's bounding box. These points were removed using LAStools' lasclip software.

4. The LAS files were then converted from IGLD85 orthometric heights to NAD83 (GRS80) ellipsoidal heights using NOAA's VDatum v3.3.

5. On March 30, 2015 tiles were added from an additional delivery from USACE following the same process.

Process Date/Time: 2015-03-30 00:00:00

Catalog Details

Catalog Item ID: 49736
GUID: gov.noaa.nmfs.inport:49736
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:21+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