gov.noaa.nmfs.inport:76153 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 2026-03-04T19:17:17 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) EPSG::6345 EPSG::5703 2024 USACE SAM Topographic Lidar DEM: Lake Seminole (AL, FL, GA) 2024 creation 2025 publication NOAA/NMFS/EDM 76153 https://www.fisheries.noaa.gov/inport/item/76153 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/dataviewer/#/lidar/search/where:ID=10346/details/10346 WWW:LINK-1.0-http--link Custom Point Download Link to custom download, from the Data Access Viewer (DAV), the lidar point data from which these raster Digital Elevation Model (DEM) data were created. 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 Original Data: These files contain rasterized topographic lidar elevations generated from data collected using a Teledyne ALTM Galaxy PRIME sensor. Native lidar data is not generally in a format accessible to most Geographic 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 are referenced to the North American Datum of 1983 Universal Transverse Mercator Zone 16 North (NAD83 UTM Zone 16N). Vertical positions are referenced to the NAD83 (2011) ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID18 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, which are tiled into 1-km by 1-km boxes defined by the Military Grid Reference System. The data were provided to the NOAA Office for Coastal Management (OCM) by the USACE Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) to make the data publicly available for bulk and custom downloads from the NOAA Digital Data Access Viewer (DAV). This data was collected by the USACE in support of the South Atlantic Division, Mobile District Lake Seminole Project to assess changes in elevation along the banks and rivers of Lake Seminole of Georgia. Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products. 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 https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/10314/supplemental/usace2023_lake_seminole_m10346.kmz This graphic shows the lidar coverage for the 2024 topographic lidar acquisition along Lake Seminole. kmz DOD/USARMY/USACE/SAM/MOBILE/OPJ/JALBTCX > Joint Airborne Lidar Bathymetry Technical Center of Expertise, Mobile District, South Atlantic Division, U.S. Army Corps of Engineers, U.S. Army, U.S. Department of Defense dataCentre Global Change Master Directory (GCMD) Data Center Keywords 17.0 EARTH SCIENCE > LAND SURFACE > GEOMORPHIC LANDFORMS/PROCESSES > COASTAL LANDFORMS EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION theme Global Change Master Directory (GCMD) Science Keywords 17.0 CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > ALABAMA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > GEORGIA VERTICAL LOCATION > LAND SURFACE place Global Change Master Directory (GCMD) Location Keywords 20.8 LIDAR > Light Detection and Ranging instrument Global Change Master Directory (GCMD) Instrument Keywords 17.2 Airplane > Airplane platform Global Change Master Directory (GCMD) Platform Keywords 17.2 Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX) Mobile District National Coastal Mapping Program (NCMP) U.S. Army Corps of Engineers theme Teledyne ALTM Galaxy PRIME (GALAXY) instrument 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). 2025. GCMD Keywords, Version 22. 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]: 2024 USACE SAM Topographic Lidar DEM: Lake Seminole (AL, FL, GA) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/76153. 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. otherRestrictions Access Constraints: None otherRestrictions Use Constraints: These data depict the heights at the time of the survey and are only accurate for that time. Acknowledgement of the Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) would be appreciated in any publications or derived products. The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided as is without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the U.S. Army Corps of Engineers, Mobile District Office, Spatial Data Branch be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The Spatial Data Branch does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form. These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures. 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 Office for Coastal Management or its partners. unclassified 2024 USACE SAM Phase One Natural Color 8 Bit Imagery: Lake Seminole (AL, FL, GA) NOAA/NMFS/EDM 76154 crossReference 2024 USACE SAM Topographic Lidar: Lake Seminole (AL, FL, GA) NOAA/NMFS/EDM 76138 crossReference NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 76153 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocm/dmp/pdf/76153.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference grid eng; US elevation imageryBaseMapsEarthCover -85.03 -84.54 30.69 31 Dates of collection | Currentness: Ground Condition 2024-08-06 2024-08-12 GeoTIFF Zip 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://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/dem/USACE_Lake_Seminole_DEM_2024_10347/index.html WWW:LINK-1.0-http--link Bulk Download Bulk download of data files in GeoTIFF format, UTM Zone 16 NAD83(2011) meters coordinates and elevations in NAVD88 (GEOID18) meters. download https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10347/details/10347 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 dataset Accuracy Every effort within operational constraints was made to acquire data that meets specifications as outline in this project's Statement of Work. Per flight block, elevations in areas of swath overlap are internally consistent and meet specifications. Anomalous high and/or low elevation values have been removed, and point cloud classification algorithms have been validated via manual review and QC. Temporal differences in elevation exist in areas of active near shore processes from the dune to the depth of closure. JALBTCX conducts operations in a manner to ameliorate temporal differences, to include the collection of entire flight blocks within single missions. For a given flight block, it's adjacent flight blocks are captured within 3 days as weather and airspace permit. Horizontal Positional Accuracy Galaxy topographic data - Compiled to meet 20 cm horizontal accuracy at 95% confidence level. Vertical Positional Accuracy Galaxy topographic data - Compiled to meet 20 cm vertical accuracy at 95% confidence level. Completeness Measure Planned data coverage for this dataset includes the shoreline and / or the requested AOI along the coast of Georgia. The planned Galaxy PRIME point spacing is 36 centimeters. The planned Galaxy PRIME sidelap is 30% at altitudes of 400 meter to 1000 meter AGL. Every effort within operational constraints was made to achieve the intended data coverage and planned point densities. Galaxy data is processed from raw lidar ranges to point clouds using the Teledyne Lidar Mapping Suite and BayesMap Solution's Strip Alignment software packages. Point clouds are then classified and edited in industry-standard software packages. Derivative data products are generated through the application of gridding and contouring algorithms in a GIS environment. The data processing workflow, including software packages, algorithms and parameters are provided in detail, herein this metadata as Process Steps. The NOAA Office for Coastal Management (OCM) received the data from the USACE Joint Airborne Lidar Bathymetry Technical Center of Expertise (JALBTCX). NOAA OCM processed the data to the NOAA Digital Coast Data Access Viewer (DAV) to make the data publicly available for bulk and custom downloads. These data were collected using the Galaxy PRIME systems. It is owned and operated by the U.S. Army Corps of Engineers (USACE). The Galaxy PRIME system collects topographic lidar data at 550 kHz and RGB imagery at 2 second intervals. All Galaxy PRIME lidar data are transferred to the office for downloading and processing in Teledyne's LMS 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. HTDP (Horizontal Time-Dependent Positioning) is the software being used to transform sbet trajectories from POSPac (ITRF2000 mission epoch) to NAD83(2011) at the 2010.0 epoch. This approach maintains consistency with the NGS (National Geodetic Survey) reference to NAD83 and the North American tectonic plates. POSPac transformation are based on the MORVEL56 tectonic plate model. Upon inspection and QA/QC in the software packages PFM_ABE, acquisition from Galaxy PRIME was focused data are flagged as invalid and have the withheld bit set. 2024-08-06T00:00:00 LAS files are imported into TerraScan V13 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's ground surface instead of manually reclassifying those points. They are partitioned into a series of 1-km delivery boxes, one Classified LAS file per box. The format of the file is LAS version 1.4. Data are classified as 1 (valid non-ground topographic data) and 2 (valid ground topographic data). The National Geodetic Survey's (NGS) GEOID18 model is used to transform the vertical positions from ellipsoid to orthometric heights referenced to the North American Vertical Datum of 1988 (NAVD88). 2025-04-09T00:00:00 Data classified as ground points (2) 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 V8.4.2 to perform this operation utilizing the following parameters; Legacy Triangulation, Max Sample Excursion - 500, Max Triangle Side 500, and Tiling Settings Snap to Grid (Expand). The grid is exported from Quick Terrain Modeler as a GeoTIFF 32-Bit DEM file. Utilizing an in-house python script within Jupyter Notebook, the null data values in the file are converted from -9999 to NoData with the Set Null tool from the ArcGIS Spatial Analyst Toolbox. The script also calls the Define Projection tool from the ArcGIS Data Management Toolbox to set the file's coordinate system information to The North American Datum of 1983 (2011). The raster is then multiplied against a corresponding 1m mask raster, an intermediate mask image produced from JALBTCX's 1mGrid data product, to remove interpolated areas where data does not exist. 2025-06-09T00:00:00 The NOAA Office for Coastal Management (OCM) received 713 GeoTIFF files from USACE JALBTCX for the area around Lake Seminole. The bare earth raster files were at a 1 m grid spacing. The data were in UTM Zone 16N NAD83 (2011), meters coordinates and NAVD88 (Geoid18) elevations in meters. OCM assigned the appropriate EPSG codes (Horiz - 6345, Vert - 5703) and copied the raster files to AWS S3 for Digital Coast storage and provisioning purposes. 2025-06-12T00:00:00 Office for Coastal Management processor USACE JALBTCX USACE JALBTCX originator