76092 Data Set Published / External 49404 DEMs - partner (no harvest) Project Completed 2017 2023 Original Product: These are Topobathy Digital Elevation Model (DEM) data for Everglades National Park as part of the required deliverables for the 2018 Florida Everglades National Park Lidar project. Class 2 (ground) and Class 40 (submerged topography/bathymetry) lidar points in conjunction with the hydro bathymetric void breaklines were used to create a 0.5 meter Topobathy Raster DEM. Original Dataset Geographic Extent: Florida Everglades National Park covering approximately 1,211 square miles. Original Dataset Description: Florida Everglades National Park 2018 Lidar project called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83 (2011), Universal Transverse Mercator, meters and vertical datum of NAVD88 (GEOID12B), meters. Lidar data was delivered as processed Classified LAS 1.4 files, formatted to 3320 individual 1000 m x 1000 m tiles, as tiled Intensity Imagery, and as tiled bare earth topobathy DEMs; all tiled to the same 1000 m x 1000 m schema. Original Dataset Ground Conditions: Lidar was collected in early to mid 2017, while no snow was on the ground and rivers were at or below normal levels. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, Dewberry established a total of 47 ground control points that were used to calibrate the lidar to known ground locations established throughout the Florida Everglades National Park project area. An additional 120 independent accuracy checkpoints, 61 in Bare Earth and Urban landcovers (61 NVA points), 59 in Tall Grass and Brushland/Low Trees categories (59 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. This metadata record supports the data entry in the NOAA Digital Coast Data Access Viewer (DAV). For this data set, the DAV is leveraging the GeoTIFF files hosted by USGS on Amazon Web Services. To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create Intensity Images, Breaklines and Raster DEM. The purpose of these lidar data was to produce high accuracy 3D Topobathy Digital Elevation Model (DEM) with a 0.5 meter cell size. These lidar point cloud data were used to create intensity images, 2D breaklines, and Topobathy DEMs as necessary. Raster File Type = IMG Bit Depth/Pixel Type = 32-bit float Raster Cell Size = 0.5 Meter Interpolation or Resampling Technique = Triangulated Irregular Network Required Vertical Accuracy = 19.6 cm NVA Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > DIGITAL ELEVATION/TERRAIN MODEL (DEM) Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY Theme Global Change Master Directory (GCMD) Science Keywords EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION Theme ISO 19115 Topic Category elevation Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA Spatial Global Change Master Directory (GCMD) Location Keywords CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > FLORIDA Spatial Global Change Master Directory (GCMD) Location Keywords VERTICAL LOCATION > LAND SURFACE Spatial Global Change Master Directory (GCMD) Location Keywords VERTICAL LOCATION > SEA FLOOR Instrument Global Change Master Directory (GCMD) Instrument Keywords LIDAR > Light Detection and Ranging Platform Global Change Master Directory (GCMD) Platform Keywords Airplane > Airplane Office for Coastal Management Charleston SC Data Set Elevation None Planned Model (digital) Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners. Dewberry, USGS Data Steward 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Distributor 2023 Organization U.S. Geological Survey 12201 Sunrise Valley Drive Reston VA 20191 USA https://usgs.gov USGS Home Home page for USGS Online Resource Metadata Contact 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Point of Contact 2025 Organization NOAA Office for Coastal Management NOAA/OCM coastal.info@noaa.gov 2234 South Hobson Ave Charleston SC 29405-2413 (843) 740-1202 https://coast.noaa.gov NOAA Office for Coastal Management Home Page Online Resource Ground Condition -81.167515 -80.436127 25.764331 25.14161 Range 2017-04-19 2017-06-12 Yes No No No No Projected EPSG:6346 NAD83(2011) / UTM zone 17N NAD83 (National Spatial Reference System 2011) GRS 1980 6378137 298.257222101 NAD83(2011) UTM zone 17N Transverse Mercator Latitude of natural origin 0° 0' 0" N Longitude of natural origin 81° 0' 0" W Scale factor at natural origin 0.9996 False easting 500000 metre False northing 0 metre 1 Easting E metre east 2 Northing N metre north Vertical EPSG:5703 NAVD88 height North American Vertical Datum 1988 1 Gravity-related height H metre up Unclassified Data is available online for bulk and custom downloads. None 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. https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=10342/details/10342 2025 Organization NOAA Office for Coastal Management 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. Zip Not Applicable Zip https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/FL_Everglades_NP_LiDAR_2017_D16/FL_Everglades_N_2017/TIFF/ 2023 Organization U.S. Geological Survey Bulk Download - FL_Everglades_N Bulk download of data files in GeoTIFF format, based on a horizontal datum/projection of UTM 17N, NAD83(2011), meters and a vertical datum of NAVD88 (GEOID12B), units in meters. LAZ GeoTIFF https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/FL_Everglades_NP_LiDAR_2017_D16/FL_Everglades_S_2017/TIFF/ 2023 Organization U.S. Geological Survey Bulk Download - FL_Everglades_S Bulk download of data files in GeoTIFF format, based on a horizontal datum/projection of UTM 17N, NAD83(2011), meters and a vertical datum of NAVD88 (GEOID12B), units in meters. GeoTIFF https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/9818/supplemental/fl2017_everglades_np_m9818.kmz Browse Graphic Browse Graphic kmz This graphic displays the footprint for this lidar data set. https://coast.noaa.gov/dataviewer/ NOAA's Office for Coastal Management (OCM) Data Access Viewer (DAV) Online Resource HTML 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. https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/FL_Everglades_NP_LiDAR_2017_D16/FL_Everglades_N_2017/reports/Everglades_National_Park_Topobathy_Lidar_Project_Report_USGS_20180830.pdf Lidar Report Online Resource pdf Link to the lidar report. https://prd-tnm.s3.amazonaws.com/StagedProducts/Elevation/metadata/FL_Everglades_NP_LiDAR_2017_D16/USGS_FL_Everglades_NP_LiDAR_2017_D16_Project_Report.pdf USGS Project Report Online Resource pdf Link to the USGS project report which provides information about the project, the vertical accuracy results, the point classifications and the sensors used. https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/metadata/FL_Everglades_NP_LiDAR_2017_D16/ USGS Additional Info Online Resource Link to the reports, breaklines, metadata, spatial metadata, and shapefiles. Dewberry Determined DEM Vertical Accuracy The topographic portion of this DEM dataset was tested to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for a 10 cm RMSEz Vertical Accuracy Class. Actual NVA accuracy was found to be RMSEz = 3.5 cm, equating to +/- 6.8 cm at 95% confidence level. Actual VVA accuracy was found to be +/- 34.8 cm at the 95th percentile. The bathymetric portion of this DEM dataset was not tested. USGS Determined DEM Vertical Accuracy Non-Vegetated Vertical Accuracy (NVA) = 7.11 cm at the 95% Confidence Level or 3.6 cm RMSE Vegetated Vertical Accuracy (VVA) = 33.97 cm at the 95th Percentile Bathymetric Vertical Accuracy = 39.66 cm at the 95% Confidence Level Refer to the USGS project report in the URL section of this metadata record. Datasets contain complete coverage of tiles. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. There are no void areas or missing data. The raw point cloud is of good quality and data passes Non-Vegetated Vertical Accuracy specifications. Data covers the entire area specified for this project. Yes Unknown Yes NCEI-CO Data is backed up to tape and to cloud storage. The NOAA Office for Coastal Management (OCM) ingested references to the USGS GeoTIFF files that are hosted on Amazon Web Services (AWS), into the Digital Coast Data Access Viewer (DAV). The DAV accesses the raster data as it resides on AWS. USGS GeoTIFF Files - FL_Everglades_N Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/FL_Everglades_NP_LiDAR_2017_D16/FL_Everglades_N_2017/TIFF/ USGS GeoTIFF Files for FL_Everglades_N USGS GeoTIFF Files - FL_Everglades_S Organization USGS Publisher https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/FL_Everglades_NP_LiDAR_2017_D16/FL_Everglades_S_2017/TIFF/ USGS GeoTIFF files for FL_Everglades_S 1 The boresight for each lift was done individually as the solution may change slightly from lift to lift. The following steps describe the Raw Data Processing and Boresight process: 1) Technicians processed the raw data to LAS format flight lines using the final GPS/IMU solution. This LAS data set was used as source data for boresight. 2) Technicians first used commercial software to calculate initial boresight adjustment angles based on sample areas selected in the lift. These areas cover calibration flight lines collected in the lift, cross tie and production flight lines. These areas are well distributed in the lift coverage and cover multiple terrain types that are necessary for boresight angle calculation. The technician then analyzed the results and made any necessary additional adjustment until it is acceptable for the selected areas. 3) Once the boresight angle calculation was completed for the selected areas, the adjusted settings were applied to all of the flight lines of the lift and checked for consistency. The technicians utilized commercial and proprietary software packages to analyze how well flight line overlaps match for the entire lift and adjusted as necessary until the results met the project specifications. 4) Once all lifts were completed with individual boresight adjustment, the technicians checked and corrected the vertical misalignment of all flight lines and also the matching between data and ground truth. The relative accuracy was less than or equal to 6 cm within individual swaths and less than or equal to 8 cm RMSEz or within swath overlap (between adjacent swaths). 5) The technicians ran a final vertical accuracy check of the boresighted flight lines against the surveyed check points after the z correction to ensure the requirement of NVA = 19.6 cm 95% Confidence Level (Required Accuracy) was met. Point classification was performed according to USGS Lidar Base Specification 1.2, and 2D breaklines were collected for water features. Topobathy DEMs were exported from the classified point cloud. 2017-01-01T00:00:00 2 LAS Point Classification: The point classification is performed as described below. The bare earth surface is then manually reviewed to ensure correct classification on the Class 2 (Ground) and Class 40 (Submerged Topography/Bathymetry) points. After the bare-earth surface is finalized, it is then used to generate all hydro-breaklines through heads-up digitization. All ground (ASPRS Class 2) lidar data inside of the Inland Water Void breaklines were then classified to water (ASPRS Class 9) using TerraScan macro functionality. Refraction correction was performed on all data within the Land/Water Interface breaklines. All ground (ASPRS Class 2) lidar data were then classified to submerged topography/bathymetry (ASPRS Class 40), and water surface (ASPRS Class 41) were classified using Terrascan macro functionality on both Green sensor and Near Infrared sensor data within the Land/Water Interface breaklines. Submerged topography/bathymetry (ASPRS Class 40) were then classified to water column/ no bottom found (ASPRS Class 45) within the Topobathy Void breaklines. All overlap data was processed through automated functionality provided by TerraScan to classify the overlapping flight line data to approved classes by USGS. The overlap data was classified using standard LAS overlap bit. These classes were created through automated processes only and were not verified for classification accuracy. Due to software limitations within TerraScan, these classes were used to trip the withheld bit within various software packages. These processes were reviewed and accepted by USGS through numerous conference calls and pilot study areas. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Global Mapper us used as a final check of the bare earth dataset. GeoCue was then used to create the deliverable industry-standard LAS files for both the All Point Cloud Data and the Bare Earth. Dewberry proprietary software was used to perform final statistical analysis of the classes in the LAS files, on a per tile level to verify final classification metrics and full LAS header information. 2018-05-15T00:00:00 3 Topobathy Raster DEM Process: Class 2 (ground) and Class 40 (submerged topography/bathymetry) lidar points in conjunction with the hydro bathymetric void breaklines were used to create a 0.5 meter Topobathy Raster DEM. Using automated scripting routines within ArcMap, an ERDAS Imagine IMG file was created for each tile. Each surface is reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface. 2018-07-15T00:00:00 4 The NOAA Office for Coastal Management (OCM) created references to the USGS GeoTIFF files that were ingested into the NOAA Digital Coast Data Access Viewer (DAV). No changes were made to the data. The DAV will access the raster data as it resides on Amazon Web Services (AWS). These are the GeoTIFF files that are being accessed: https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/FL_Everglades_NP_LiDAR_2017_D16/FL_Everglades_N_2017/TIFF/ https://prd-tnm.s3.amazonaws.com/index.html?prefix=StagedProducts/Elevation/OPR/Projects/FL_Everglades_NP_LiDAR_2017_D16/FL_Everglades_S_2017/TIFF/ 2025-06-06T00:00:00 Organization Office for Coastal Management OCM https://ror.org/05v14bq57 2234 South Hobson Avenue Charleston SC 29405-2413 https://www.coast.noaa.gov/ 69618 Data Set Cross Reference gov.noaa.nmfs.inport:76092 Rebecca Mataosky 2025-06-06T15:41:50 SysAdmin InPortAdmin 2026-03-04T19:17:17 2025-06-06 OCM Partners OCMP 1002 Public No No 2023-09-08 1 Year 2024-09-08