gov.noaa.nmfs.inport:80417 eng UTF8 dataset Elevation Office for Coastal Management resourceProvider NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact 2026-09-21T18:56:23 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) EPSG::5609 EPSG::6346 2025 NOAA OCS Topobathy Lidar DEM: Thunder Bay NMS (H14138), MI mi2025_thndr_bay_h14138_dem_m15625 2025 creation 2026 publication NOAA/NMFS/EDM 80417 https://www.fisheries.noaa.gov/inport/item/80417 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information https://coast.noaa.gov/ WWW:LINK-1.0-http--link NOAA's Office for Coastal Management (OCM) website Information on the NOAA Office for Coastal Management (OCM) download https://www.ngdc.noaa.gov/nos/H14001-H16000/H14138.html WWW:LINK-1.0-http--link BAG, GeoImage, Reflectance Intensity Link to the BAG, GeoImage, and Reflectance Intensity data available from NCEI. download https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/igld85/15623/supplemental/H14138_Survey_Metadata.pdf WWW:LINK-1.0-http--link Lidar Report Link to the NV5 lidar report. download https://coast.noaa.gov/dataviewer/ WWW:LINK-1.0-http--link NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) 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. download The NOAA Thunder Bay National Marine Sanctuary (NMS) Topobathymetric Project Lidar data were collected by NV5 using Leica Chiroptera-5 and HawkEye-5 systems. The NOAA Thunder Bay H14138 Topobathymetric Lidar survey acquisition was flown between 20250718 and 20250726 in five missions. The derived topobathymetric bare earth digital elevation model (DEM) raster mosaics were provided in Cloud Optimized GeoTIFF format with 1 meter pixel resolution, IGLD85 Low Water Datum elevations, and were delineated into 26 - 5000 meter x 5000 meter DEM tiles clipped to the 100 meter buffered project boundary covering an area of 35,166 acres. The raster mosaics were referenced to the NAD83(2011) epoch:2010 horizontal geodetic datum, with International Great Lakes Datum 85 (IGLD85) Low Water Datum Heights, and are projected in UTM Zone 17 North coordinates. The NOAA Office of Coast Survey (OCS) provided this data to the NOAA Office for Coastal Management (OCM) for the purpose of making the data publicly available for bulk and custom downloads from the NOAA Digital Coast Data Access Viewer. This lidar survey was required by National Oceanic and Atmospheric Administration (NOAA) Office of Coast Survey (OCS), Hydrographic Survey Division (HSD) to support collaboration with NOAA Sanctuaries and Great Lakes Environmental Research Lab (GLERL) to modernize hydrographic surveys in the Thunder Bay National Marine Sanctuary in order to support habitat analysis, environmental modeling, and update Coastal Survey's nautical charts to promote maritime safety in the multi-industry trafficked corridor. We request that you credit the National Oceanic and Atmospheric Administration (NOAA) when you use these data in a report, publication, or presentation. Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office of Coast Survey (OCS), Hydrographic Surveys Division (HSD) completed NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information pointOfContact NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information custodian notPlanned EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY > COASTAL BATHYMETRY EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION theme Global Change Master Directory (GCMD) Science Keywords 23.3 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GREAT LAKES CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MICHIGAN VERTICAL LOCATION > LAND SURFACE VERTICAL LOCATION > SEA FLOOR place Global Change Master Directory (GCMD) Location Keywords 23.3 LIDAR > Light Detection and Ranging instrument Global Change Master Directory (GCMD) Instrument Keywords 23.3 Airplane > Airplane platform Global Change Master Directory (GCMD) Platform Keywords 23.3 DOC/NOAA/NOS/OCM > Office of Coastal Management, National Ocean Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2026. GCMD Keywords, Version 24. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian DEMs project InPort otherRestrictions Cite As: Office for Coastal Management, [Date of Access]: 2025 NOAA OCS Topobathy Lidar DEM: Thunder Bay NMS (H14138), MI [Data Date Range], https://www.fisheries.noaa.gov/inport/item/80417. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. license To the extent possible under law, the U.S. Government has waived all copyright and related or neighboring rights to this dataset. otherRestrictions Access Constraints: None otherRestrictions 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. otherRestrictions Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the National Ocean Service, the Office of Coast Survey, the Office for Coastal Management or its partners. unclassified 2025 NOAA OCS Topobathy Lidar: Thunder Bay NMS (H14138), MI NOAA/NMFS/EDM 80422 crossReference 1 eng; US elevation -84.389591 -83.562155 45.343466 45.799254 | Currentness: Ground Condition 2025-07-18 2025-07-26 The NOAA Thunder Bay H14138 Topobathymetric Lidar dataset includes all lidar returns within the project's 100 meter buffered boundary. Automated classification algorithms were used to determine topographic ground and bathymetric bottom point classification followed by manual editing to ensure final proper classification per contractual specifications. Class 2 topographic ground, class 40 bathymetric bottom, and class 43 submerged object were used to create the final bare earth elevation DEMs. A Bathymetric void shapefile was created to restrict interpolation in the final bare earth elevation model in areas of bathymetric voids greater than 9 square meters. The methodology used for the Thunder Bay H14138 product deliverables were further detailed in the NOAA Thunder Bay H14138 Topobathymetric final report. Zip GeoTIFF NOAA Office for Coastal Management (843) 740-1202 2234 South Hobson Ave Charleston SC 29405-2413 coastal.info@noaa.gov https://coast.noaa.gov WWW:LINK-1.0-http--link NOAA Office for Coastal Management Website NOAA Office for Coastal Management Home Page information distributor https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=15625/details/15625 WWW:LINK-1.0-http--link Customized Download 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. download https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/dem/MI_Thndr_Bay_tb_h14138_2025_15625/index.html WWW:LINK-1.0-http--link Bulk Download Bulk download of data files in UTM Zone 17N NAD83 (2011) meters coordinates and IGLD85 elevations in meters. download dataset Horizontal Positional Accuracy Horizontal Accuracy Check using the IMU and GNSS Positional Error (NOAA RSD/2014 ASPRS Standard Reporting Practice/FGDC NSSDA): IMU and GNSS positional error were computed separately using the Chiroptera-5 trajectories and the HawkEye-5 trajectories for H14138, but were all found to be the same. Based on the following parameters, a flying altitude of 400 meters, a maximum combined roll/pitch IMU error of 0.002 decimal degrees and a maximum GNSS positional error of 0.005 meters, this project was produced to meet a 0.025 m RMSEr Horizontal Positional Accuracy Class and 0.044 m ACCr (the accuracy value according to NSSDA at 95% confidence). Vertical Positional Accuracy Lidar Non-Vegetated Vertical Accuracy Analysis (NOAA RSD/2014 ASPRS Standard Reporting Practice): For H14138, 20 ground checkpoints were withheld from the calibration and post processing of the lidar point cloud, with a resulting non-vegetated vertical accuracy (NVA) of 0.051 meters against the bare earth DEM, with 95% confidence or 2.6 cm RMSE. Lidar Bathymetric Vertical Accuracies (NOAA RSD/2014 ASPRS Standard Reporting Practice): Bathymetric (submerged) checkpoints were collected and compared against the classified LAS to assess the submerged surface vertical accuracy. The Bathymetric Vertical Accuracy for H14138 was found to be RMSE = 0.068 m with 71 submerged points. Completeness Report Data fully covers the 26 bare earth DEM tiles (5000m x 5000m tiles). Conceptual Consistency Not applicable The NOAA Office for Coastal Management (OCM) received the GeoTIFF files from the NOAA Office of Coast Survey (OCS). Lidar data for the NOAA Thunder Bay H14138 Topobathymetric survey was acquired by NV5 using Leica Chiroptera-5 and HawkEye-5 topobathymetric lidar systems. All derived DEM data is referenced to: Horizontal Datum-NAD83(2011) epoch: 2010.00 Projection-UTM Zone 17N Horizontal Units-meters Vertical Datum-IGLD85 LWD Vertical Units-meters NOAA provided NV5 with a project boundary for the NOAA Thunder Bay Topobathymetric project. The collected lidar data were processed in the field by NV5 to a level that allowed for immediate QA\QC measures to determine proper sensor function and assess the submerged topography coverage. NV5 reviewed all acquired flight lines to ensure complete survey area coverage and positional accuracy of the laser points. NV5 resolved kinematic corrections for the aircraft Global Navigation Satellite System (GNSS) data using static Global Positioning System (GPS) data from Continuously Operating Reference Stations (CORS) utilizing the Online Positioning User Service (OPUS) for precise positioning. Using raster-based QC methods, the output data was reviewed to ensure the refraction correction operated properly. After the resulting data was reviewed to ensure accurate positioning, custom classification algorithms were applied followed by manual classification editing using TerraSolid software packages and NV5’s proprietary LAS Monkey software to meet the contract specified ASPRS classification scheme listed below. Absolute vertical accuracy was assessed using ground survey data compared against the final H14138 dataset. The final lidar point cloud was provided in .LAS 1.4 file format, point record format 6 and delineated into 500 meter x 500 meter tiles and clipped to the 100 meter buffered project boundary. NV5's proprietary software LasMonkey was used to update LAS header information, including projection and coordinate reference system information. The final lidar data are in LAS format 1.4 and point data record format 6. The derived topobathymetric bare earth digital elevation model (DEM) raster mosaics were created from class 2 topographic ground, class 40 bathymetric bottom, and class 43 submerged object classified returns. The final bare earth rasters were provided in Cloud Optimized GeoTIFF format with 1 meter pixel resolution, IGLD85 Low Water Datum elevations, and were delineated into 52 - 5000 meter x 5000 meter DEM tiles clipped to the 100 meter buffered project boundary. A Bathymetric void shapefile was created to restrict interpolation in the final bare earth elevation model in areas of bathymetric voids greater than 9 square meters. The methodology used for the Thunder Bay H14138 product deliverables were further detailed in the NOAA Thunder Bay H14138 Topobathymetric final report. The final classification scheme is as follows: 1- Unclassified 1+Withheld- Edge Clip 1+Overlap+Withheld- Unrefracted Returns from Green Laser 2- Topographic Ground 7+Withheld- Low Noise 18+Withheld- High Noise 40- Bathymetric Bottom (Submerged Topography) 41- Water Surface 42+Synthetic- Synthetic Derived Water Surface 43- Submerged Object 45- Water Column 47+Withheld- Submerged (Bathymetric) Noise 2026-02-24T00:00:00 NV5 transformed the vertical datum of the lidar datset from GRS80 ellipsoid to IGLD85 LWD elevations to create the final topobathymetric lidar products and resulting bare earth DEMs. The final bare earth digital elevation model (DEM) rasters were created using a triangulated irregular network (TIN) surface built from class 2 topographic ground, class 40 bathymetric bottom, and class 43 submerged feature classified points. A shapefile delineating bathymetric voids was created to limit the extent of triangulation (interpolation in the TIN) in the final bare earth topobathymetric elevation model to avoid potentially false interpolation across areas without mapped bathymetry. A threshold of 9 square meters was determined to restrict interpolation in areas lacking bathymetric bottom returns. Bathymetric void polygons were developed by calculating the maximum edge lengths of delineated triangles in the TIN surface model built from bathymetric bottom and submerged object classified returns. The maximum edge length that a 9 square meter equilateral triangle can have is 4.56 meters. Any TIN triangles with edge lengths greater than 4.56 meters were delineated into the bathymetric void shapefile and were used to clip out (exclude) interpolation areas from the bare earth DEM. Any TIN triangles with maximum edge lengths less than 4.56 meters were not delineated as a bathymetric void and remain as interpolation in the bare earth DEM. The final topobathymetric bare earth DEMs were output at 1 meter resolution in GeoTIFF format into 26 - 5000 m x 5000 m tiles. The NOAA H14138 Thunder Bay Topobathymetric Lidar Bare Earth Model rasters were clipped to the extent of the project boundary and were named according to standard NOAA National Geodetic Survey (NGS), Remote Sensing Division naming schematics. (YYYY_{6-digit X coordinate value}e_{7-digit Y coordinate value}n_DEM) YYYY representing the year of project data acquisition and the XY coordinates representing the northwest corner of each respective DEM file. 2026-02-24T00:00:00 The NOAA Office for Coastal Management (OCM) received GeoTIFF files from the NOAA Office of Coast Survey. The files were in UTM Zone 17N NAD83 (2011) meters coordinates and the elevations were in Low Water Datum (LWD) IGLD85 meters. The NOAA Great Lakes Low Water Datum (LWD) for Lake Huron is officially set at 176.0 meters IGLD85. In order to convert the data to IGLD85, 176.0 meters was added to each grid node. This was done with gdal_calc.py. The raster files were at a 1 m grid spacing. The GeoTIFF files were copied to NOAA OCM resources and made available for bulk and custom downloads from the NOAA Digital Coast Data Access Viewer (DAV). 2026-09-09T00:00:00 NOAA Office for Coastal Management (843) 740-1202 coastal.info@noaa.gov processor NOAA Office of Coast Survey GeoTIFF Files NOAA OCS https://nauticalcharts.noaa.gov/ WWW:LINK-1.0-http--link NOAA Office of Coast Survey (OCS) Source Citation URL information originator