Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM) United States Army Corps of Engineers (USACE), JALBTCX (Joint Airborne Lidar Bathymetry Technical Center of eXpertise) 20170215 Lidar DEM https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6234 https://coast.noaa.gov/htdata/raster2/elevation/USACE_post_matthew_DEM_2016_6234 https://coast.noaa.gov/dataviewer https://coast.noaa.gov These files contain rasterized topobathy lidar elevations generated from data collected by the Coastal Zone Mapping and Imaging Lidar (CZMIL) system. CZMIL integrates a lidar sensor with simultaneous topographic and bathymetric capabilities, a digital camera and a hyperspectral imager on a single remote sensing platform for use in coastal mapping and charting activities. 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, provided in decimal degrees of latitude and longitude, are referenced to the North American Datum of 1983 National Adjustment of 2011 (NAD83 (2011)). Vertical positions are referenced to the NAD83 (2011) ellipsoid and provided in meters. The National Geodetic Survey's (NGS) GEOID12B 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 LAS file index is provided by the shape files, "MGRS_1km_17R.shp ", and the numbers used to identify files are in the "Box" field of the shape file. The data file naming convention is based on the year, effort, area name, "Box" number and data product type. An example file name is "2016_PostMatthew_FL_17RMN8758_1mGrid.tif", where 2016 is the year of data collection, PostMatthew is the effort under which data were collected, FL is the area of data collection, 17RMN8758 is the "Box" number and 1mGrid is the data product type. This data was collected as part of USACE Post-Hurricane Matthew emergency response efforts to assess elevations above and below water along the coasts of Virginia, North Carolina, South Carolina, Georgia and Florida. None. 201610 201612 ground condition Complete None planned -81.47518 -75.22983 38.04567 25.64987 ISO 19115 Topic Category elevation imageryBaseMapsEarthCover oceans GCMD Earth Sciences Keywords v7 OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > SEAFLOOR TOPOGRAPHY OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY EARTH SCIENCE > OCEANS >COASTAL PROCESSES > COASTAL ELEVATION SOLID EARTH > GEOMORPHOLOGY > COASTAL LANDFORMS/PROCESSES OCEANS > COASTAL PROCESSES > COASTAL ELEVATION LAND SURFACE > TOPOGRAPHY> TERRAIN ELEVATION HUMAN DIMENSIONS > LAND USE/LAND COVER > LAND USE CLASSES none Bathymetry Topography Digital Surface Model (DSM) Joint Airborne Lidar Bathymetry Technical Center of eXpertise (JALBTCX) Mobile District Post-Matthew U.S. Army Corps of Engineers (USACE) Coastal Zone Mapping Imaging Lidar (CZMIL) None Virginia Georgia South Carolina No restrictions apply to these data. 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. Acknowledgement of the USACE Mobile District would be appreciated for products derived from these data. https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/5184/supplemental/2016_post-matthew.kmz This graphic shows the lidar footprint for the 2106 post-Matthew topobathy lidar project on the east coast kmz USACE Mobile District flew and processed the data During inspection and QC of the lidar point cloud, flightline to flightline elevation differences met the CZMIL sensor specifications. This data set covers the spatial extent of topographic lidar data obtained during this survey. None reported 1 CZMIL topographic data - Compiled to meet 1 m horizontal accuracy at 95% confidence level. CZMIL bathymetric data - Compiled to meet 3.5 + 0.05d m horizontal accuracy at 95% confidence level, d is depth. None reported 0.196 CZMIL topographic data - Compiled to meet 19.6 cm vertical accuracy at 95% confidence level. CZMIL bathymetric shallow FOV data - Compiled to meet SQRT((0.25^2) +((0.0075d)^2)) m vertical accuracy at 95% confidence level, d is depth. CZMIL bathymetric deep FOV data - Compiled to meet SQRT((0.30^2) +((0.013d)^2)) m vertical accuracy at 95% confidence level, d is depth. JALBTCX 2016 lidar data Kiln, MS 2016 online 201610 201612 ground condition Post-Matthew_lidar_Data This data source was used to populate the lidar point cloud data. These data were collected using the CZMIL system. It is owned and operated by the U.S. Army Corps of Engineers (USACE). The system collects topobathy lidar data at 10 kHz and RGB imagery at 2 Hz. A CASI-1500 hyperspectral line scanner is integrated with the system as well. Aircraft position, velocity and acceleration information are collected through a combination of Novatel and POS A/V 610 equipment. All raw data streams are transferred to the office for downloading and processing in CZMIL's HydroFusion 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. Upon inspection and QA/QC in the software packages Fledermaus and PFM_ABE, anomalous data are flagged as invalid and have the withheld bit set. PFM_ABE software then converts all valid data from ellipsoid to orthometric heights based on the NGS' GEOID12B model and exports valid lidar data as a series of unclassified LAS files. 2016 JALBTCX mailing and physical

7225 Stennis Airport Rd., STE 100

Kiln MS 01556 USA 228-252-1121 228-252-1133 8am - 5pm Monday through Friday LAS files are imported into TerraScan V13 module within Microstation V8i, classifies valid topobathy data as ground points (2) and unclassified points (1), and valid bathymetric points (29). 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 1.2. Data are classified as 1 (valid non-ground topographic data), 2 (valid ground topographic data), and 29 (valid bathymetric data). 2016 JALBTCX mailing and physical

7225 Stennis Airport Rd., STE 100

Kiln MS 01556 USA 228-252-1121 228-252-1133 8am - 5pm Monday through Friday Data classified as unclassified points (1), ground points (2), and bathymetric points (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 V8 to perform this operation utilizing the following parameters; "Adaptive Triangulation, Max Z", "Max Sample Excursion - 5", "Max Triangle Side - 10", 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 V10.2, the ASCII Z grid file is converted to a tif-format raster file whose projection is defined as "The North American Datum of 1983 (2011)." 2016 JALBTCX mailing and physical

7225 Stennis Airport Rd., STE 100

Kiln MS 01556 USA 228-252-1121 228-252-1133 8am - 5pm Monday through Friday Data were received by the NOAA Office for Coastal Management from the USACE Mobile District in the form described above. It was ingested into the Digital Coast Data Access Viewer system for distribution without any conversion. 201701 Raster 0.000009 0.000009 Decimal degrees NAD83 (NA2011) Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 GEOID12B 0.001 Meters Explicit elevation coordinate included with horizontal coordinates NOAA Office for Coastal Management mailing and physical

2234 South Hobson Avenue

Charleston SC 29405-2413 843-740-1202 coastal.info@noaa.gov Downloadable Data Any conclusions drawn from the analysis of this information are not the responsibility of USACE, the NOAA Office for Coastal Management, or their partners. This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6234. The lidar point cloud source data can be obtained on-line at: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5184. 20170213 NOAA Office for Coastal Management mailing and physical

2234 South Hobson Avenue

Charleston SC 29405-2413 843-740-1202 coastal.info@noaa.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time