2012 USACE NCMP Topobathy Lidar DEM: Lake Michigan (IL, IN, MI, WI)
Data Set (DS) | OCM Partners (OCMP)GUID: gov.noaa.nmfs.inport:64447 | Updated: May 30, 2023 | Published / External
Item Identification
Title: | 2012 USACE NCMP Topobathy Lidar DEM: Lake Michigan (IL, IN, MI, WI) |
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Short Name: | usace2012_lake_mich_m9265_metadata |
Status: | Completed |
Creation Date: | 2012 |
Abstract: |
These files contain rasterized topographic elevations generated from topographic lidar data classified as ground. These data were data collected with a RIEGL VQ-480 airborne lidar system along the Lake Michigan shoreline. Data coverage generally extends along the shoreline 500 meters onshore, to 1000 meters offshore from the waterline. 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, are referenced to the NAD83 (2011) Epoch 2010 datum. Vertical elevations in meters are also referenced to IGLD85 and are in meters. |
Purpose: |
These data were collected as a part of the NCMP to depict the bare earth elevations above water in the Illinois, Indiana, Michigan, and Wisconsin coastal zone. |
Keywords
Theme Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT > LAND MANAGEMENT > LAND USE CLASSES
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL LANDFORMS
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL PROCESSES
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY
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Global Change Master Directory (GCMD) Science Keywords |
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
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ISO 19115 Topic Category |
elevation
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ISO 19115 Topic Category |
oceans
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UNCONTROLLED | |
GCMD Data Center Keywords | DOD/USARMY/USACE/SAM/MOBILE |
None | 1mRaster |
None | Compact Hydrographic Airborne Rapid Total Survey (CHARTS) |
None | IWG-OCM |
None | Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) |
None | Mobile District |
None | National Coastal Mapping Program (NCMP) |
None | ncdbNcmpRaster |
None | Scanning Hydrographic Operational Airborne Lidar System (SHOALS) |
None | Topography |
None | U.S. Army Corps of Engineers (USACE) |
Spatial Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ILLINOIS
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > INDIANA
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MICHIGAN
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Global Change Master Directory (GCMD) Location Keywords |
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > WISCONSIN
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Global Change Master Directory (GCMD) Location Keywords |
VERTICAL LOCATION > LAND SURFACE
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Global Change Master Directory (GCMD) Location Keywords |
VERTICAL LOCATION > SEA FLOOR
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UNCONTROLLED | |
None | Continent > North America > United States Of America > Illinois > Cook County |
None | Continent > North America > United States Of America > Illinois > Lake County |
None | Continent > North America > United States Of America > Indiana > La Porte County |
None | Continent > North America > United States Of America > Indiana > Lake County |
None | Continent > North America > United States Of America > Indiana > Porter County |
None | Continent > North America > United States Of America > Michigan > Delta County |
None | Continent > North America > United States Of America > Michigan > Menominee County |
None | Continent > North America > United States Of America > Wisconsin > Brown County |
None | Continent > North America > United States Of America > Wisconsin > Door County |
None | Continent > North America > United States Of America > Wisconsin > Kewaunee County |
None | Continent > North America > United States Of America > Wisconsin > Manitowoc County |
None | Continent > North America > United States Of America > Wisconsin > Marinette County |
None | Continent > North America > United States Of America > Wisconsin > Oconto County |
None | U.S. Coastline |
Instrument Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Instrument Keywords |
LIDAR > Light Detection and Ranging
|
Platform Keywords
Thesaurus | Keyword |
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Global Change Master Directory (GCMD) Platform Keywords |
DEM > Digital Elevation Model
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UNCONTROLLED | |
Global Change Master Directory (GCMD) Platform Keywords | Aircraft > Aircraft |
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Data Set Type: | Elevation |
Maintenance Frequency: | As Needed |
Data Presentation Form: | Model (digital) |
Distribution Liability: |
Although these data have been processed successfully on a computer system at the US Army Corps of Engineers, no warranty expressed or implied is made by the US Army Corps of Engineers regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. No responsibility is assumed by the US Army Corps of Engineers in the use of these data. 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. |
Data Set Credit: | U.S. Army Corps of Engineers (USACE), JALBTCX (Joint Airborne Lidar Bathymetry Technical Center of eXpertise) |
Support Roles
Data Steward
Date Effective From: | 2021 |
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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
Date Effective From: | 2021 |
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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
Date Effective From: | 2021 |
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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
Date Effective From: | 2021 |
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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 |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -88.053082 | |
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E° Bound: | -86.513482 | |
N° Bound: | 45.924213 | |
S° Bound: | 41.599613 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Discrete |
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Start: | 2012 |
Spatial Information
Reference Systems
Reference System 1
Coordinate Reference System |
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Reference System 2
Coordinate Reference System |
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Access Information
Security Class: | Unclassified |
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Data Access Procedure: |
Data is available online for bulk and custom downloads. |
Data Access Constraints: |
None |
Data Use Constraints: |
These data depict the heights at the time of the survey and are only accurate for that time. 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
Start Date: | 2021-03-26 |
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End Date: | Present |
Download URL: | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=9265/details/9265 |
Distributor: | NOAA Office for Coastal Management (NOAA/OCM) (2021 - Present) |
File Name: | Customized Download |
Description: |
Create custom data files by choosing data area, map projection, file format, etc. A new metadata will be produced to reflect your request using this record as a base. |
File Type: | Zip |
Compression: | Zip |
Distribution 2
Start Date: | 2021-03-26 |
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End Date: | Present |
Download URL: | https://coast.noaa.gov/htdata/raster5/elevation/USACE_Lake_Mich_DEM_2012_9265 |
Distributor: | NOAA Office for Coastal Management (NOAA/OCM) (2021 - Present) |
File Name: | Bulk Download |
Description: |
Bulk download of data files in the original coordinate system. |
File Type: | GeoTIFF |
URLs
URL 1
URL: | https://coast.noaa.gov/ |
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Name: | NOAA's Office for Coastal Management (OCM) website |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
Information on the NOAA Office for Coastal Management (OCM) |
URL 2
URL: | https://coast.noaa.gov/dataviewer/ |
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Name: | NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) |
URL Type: |
Online Resource
|
File Resource Format: | HTML |
Description: |
The Data Access Viewer (DAV) allows a user to search for and download elevation, imagery, and land cover data for the coastal U.S. and its territories. The data, hosted by the NOAA Office for Coastal Management, can be customized and requested for free download through a checkout interface. An email provides a link to the customized data, while the original data set is available through a link within the viewer. |
Technical Environment
Description: |
Microsoft Windows 7 Version 6.1 (Build 7600) ; ESRI ArcGIS 10.0.5.4400 |
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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 RMSE. |
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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 RMSE. |
Completeness Report: |
This data set covers the spatial extent of 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
Lineage Statement: |
Data collected and processed by JALBTCX. The data was provided to the NOAA Office for Coastal Management (OCM) to make it available for download from the Digital Coast. |
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Sources
USACE JALBTCX
Process Steps
Process Step 1
Description: |
These data were collected using the RIEGL VQ-480 lidar system, operated by Fugro Pelagos through contract. The system collects topographic lidar data at maximum pulse rate of 150 kHz in a wavelength near infrared. Aircraft position, velocity and acceleration information are collected a POS AV 510 equipment. All logged raw data were transferred to the office and processed in RiPROCESS software. Aircraft position data are processed using POSPac software and the results combined with the lidar data to produce 3-D positions for each lidar shot. Upon processing and export to LAS format, QA/QC is performed with Fledermaus and FPI Workbench tools. Data are classified as 0 (valid topographic data), 21 (valid topographic data acquired with the bathymetric sensor), 27 (invalid topographic and bathymetric data), 29 (valid bathymetric data). The data are then shifted vertically to the International Great Lakes Datum of 1985 (IGLD85) using the VDatum program from NOAA (National Oceanic and Atmospheric Administration). |
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Process Step 2
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 V12 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. The resulting LAS file is then combined with valid bathymetric data (29). 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’s “ground” surface instead of manually reclassifying those points. The final classification results are comprised of individual lidar points with classifications of ground (2), unclassified (1), water (9), and valid bathymetric data (29). |
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Process Step 3
Description: |
Data classified as ground (2) and valid bathymetric data (29) in the las files are converted to a grid by generating a triangulated irregular network (TIN) and then extracting the grid node elevations from the TIN surface. The origin point of the grid is located at a horizontal position whose value is evenly divisible by the 1m grid resolution such that rasters from subsequent surveys have common cell boundaries. JALBTCX uses Quick Terrain Modeler [V7.1.5 Beta] to perform this operation utilizing the following parameters;” Legacy Triangulation”, and “Tiling Settings Snap to Grid (Expand)." The grid is exported from Quick Terrain Modeler as an ESRI ASCII Z grid file. Utilizing an in-house python script within ESRI ArcMap [V10.0], the ASCII Z grid file is converted to a tiff-format raster file whose projection is defined as “The North American Datum of 1983.” The raster is then multiplied against a corresponding 1m Grid mask raster, a mask image produced from JALBTCX’s 1m Grid, in ESRI’s Raster Calculator to remove interpolated areas where data does not exist. |
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Process Step 4
Description: |
The NOAA Office for Coastal Management (OCM) received 95 1 meter bare earth raster files in GeoTiff format (IL - 11 files, IN - 7 files, MI - 26 files, WI - 51 files) from USACE JALBTCX along the Illinois, Indiana, Michigan and Wisconsin coastlines. The data were in geographic, NAD83 (2011) coordinates and IGLD85 elevations. OCM assigned the appropriate EPSG codes (Horiz - 6318, Vert - 5609) and copied the raster files to https for Digital Coast storage and provisioning purposes. |
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Process Date/Time: | 2021-03-22 00:00:00 |
Process Contact: | Office for Coastal Management (OCM) |
Catalog Details
Catalog Item ID: | 64447 |
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GUID: | gov.noaa.nmfs.inport:64447 |
Metadata Record Created By: | Rebecca Mataosky |
Metadata Record Created: | 2021-03-26 18:32+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2023-05-30 18:10+0000 |
Metadata Record Published: | 2021-03-30 |
Owner Org: | OCMP |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2021-03-30 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2022-03-30 |