Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM) U.S. Geological Survey North Carolina Floodplain Mapping Program Photo Science, Inc. 20160714 raster Charleston, SC NOAA's Ocean Service, Office for Coastal Management (OCM) https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5005 https://coast.noaa.gov/htdata/raster2/elevation/NorthCarolina_DEM_2014P1_5005 https://coast.noaa.gov/dataviewer https://coast.noaa.gov Geographic Extent: North Carolina Area of Interest for Sandy, covering approximately 9,396 square miles. Dataset Description: The North Carolina - Sandy LiDAR project called for the Planning, Acquisition, processing and derivative products of LIDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1. The data was developed based on a horizontal projection/datum of North Carolina State Plane Coordinate System, NAD83, survey feet and vertical datum of NAVD1988 (GEOID12A), survey feet (later changed to vertical meters). LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.3 Files formatted to 12138 individual 5000ft x 5000ft tiles, and corresponding Intensity Images and Bare Earth DEMs tiled to the same 5000ft x 5000ft schema, and Breaklines in ESRI File-Geodatabase format. Ground Conditions: LiDAR was collected in Spring 2014, 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, Photo Science established a total of 282 QA control points and 161 Land Cover control points that were used to calibrate the LIDAR to known ground locations established throughout the North Carolina - Sandy project area. Data was collected under USGS Contract: G10PC00026 Task Order Number: G14PD00182 and originally had a title of "Lidar data for North Carolina - SANDY 2014". The title was modified to avoid conflict with other phases of the North Carolina collection conducted by the North Carolina Floodplain Mapping Program (NCFMP). This data was funded jointly by USGS and NCFMP. 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 hydro-flattened Digital Elevation Model (DEM) with a 5 feet cell size. These raw lidar point cloud data were used to create classified lidar LAS files, intensity images, 3D breaklines, hydro-flattened DEMs as necessary. USGS Contract No. G10PC00026 CONTRACTOR: Photo Science, Inc Ground Control Points were acquired and calibrated by Photo Science, Inc. All Lidar data acquisition, calibration, and follow-on processing were completed by the prime contractor. Please note the lrdinfo section has been repeated twice for the two different specifications used to acquire the data. This lidar section has been commented out in xml because the standard metadata schema does not include it. 20140126 20140406 ground condition Complete None planned -77.7311406333641 -75.4480899025439 36.5701573858108 34.4274005943767 ISO 19115 Topic Category elevation None model LAS Point Cloud remote sensing Elevation data Lidar Hydrology None North Carolina Beaufort County Bertie County Camden County Carteret County Chowan County Craven County Currituck County Dare County Gates County Hertford County Hyde County Jones County Martin County Onslow County Pamlico County Pasquotank County Perquimans County Pitt County Tyrell County Washington County No restrictions apply to these data. None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no Longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of it's limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data. Acknowledgment of the NOAA Digital Coast for data distribution would also be appreciated. Photo Science, Inc., Data Acquisition Department Michael Shillenn mailing and physical

523 Wellington Way

Lexington KY 40503 USA 859-277-8700 859-277-8901 mshillenn@photoscience.com Monday through Friday 8:00 AM to 5:00 PM (Eastern Time) If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours. Photo Science, Inc. flew the LiDAR and processed the data. MicroStation Version 8; TerraScan Version 13; TerraModeler Version 13; GeoCue Version 2012.1.27.7; ESRI ArcGIS 10.1; Global Mapper 13; ALS Post Processor 2.75 Build #25; Windows 7 Operating System \\psihq_nx3200\Projects\7505_089_NorthCarolina_2014LIDAR\ 2.2 TB and \\Matrix\LIDAR\7505-089_NC_LiDAR_2014 15.8 TB Classified LAS files were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas. 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 Fundamental Vertical Accuracy specifications. The specifications require that only Fundamental Vertical Accuracy (FVA) be computed for raw lidar point cloud swath files. The vertical accuracy value is the AccuracyZ at 95 percent Confidence Interval in feet. The FVA was tested using 282 independent survey located in open terrain. The survey checkpoints were distributed throughout the project area. The 282 independent check points were surveyed using GPS techniques. See survey report for additional survey methodologies. Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control. AccuracyZ has been tested to meet 18.13 cm Fundamental Vertical Accuracy at 95 Percent confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines. 0.118 The FVA AccuracyZ in meters. The FVA was tested using 282 independent survey located in open terrain. The survey checkpoints were distributed throughout the project area. The 282 independent check points were surveyed using GPS techniques. See survey report for additional survey methodologies. Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control. The RMSE was computed to be 0.197 feet. AccuracyZ has been tested to meet 18.13 cm Fundamental Vertical Accuracy at 95 Percent confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines. Photo Science, Inc. 20140516 vector digital data and tabular data Lexington, KY Photo Science, Inc. CD-ROM 2014 ground condition NC_Sandy_2014_LiDAR_gnd_ctrl This data source was used (along with the airborne GPS/IMU Data) to aid in the georeferencing of the lidar point cloud data. Photo Science, Inc. 20140516 vector digital data and tabular data Lexington, KY Photo Science, Inc 50 online 2014 ground condition NC_Sandy_2014_LiDAR_qc_ctrl This data source was used (along with the lidar intensity imagery) to QC and vertically adjust the lidar point cloud data. Photo Science, Inc. 20140516 lidar data Photo Science, Inc. 20140516 online 20140126 20140406 ground condition NC_Sandy_2014_LiDAR_Lidar_Data This data source was used to populate the lidar point cloud data. Hydro Flattened Raster DEM Process: Class 2 LiDAR in conjunction with the hydro breaklines were used to create a 5 foot 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. Class 2 LiDAR in conjunction with the hydro breaklines were used to create a 5 foot hydro-flattened 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. NC_Sandy_2014_LiDAR_gnd_ctrl NC_Sandy_2014_LiDAR_Lidar_Data 2014 Photo Science, Inc. mailing and physical

523 Wellington Way

Lexington KY 40503 USA 859-277-8700 859-277-8901 apike@photoscience.com Monday through Friday 8:00 AM to 5:00 PM (Eastern Time) If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours. Ingestion into NOAA Digital Coast Data Access Viewer: Data were received from the North Carolina Flood Plain Mapping Program as a 5 foot Raster DEM in Imagine format. Imagine files were inconsistent in their georeferencing. They were reset to be projected coordinate system EPSG:6543 (North Carolina State Plane NAD83(2011)) using gdal_translate. The vertical units were changed from feet to meters, also using gdal_translate, to accommodate the Data Access Viewer standards. 2016 NOAA Office for Coastal Management mailing and physical

2234 South Hobson Avenue

Charleston SC 29405-2413 843-740-1202 coastal.info@noaa.gov Raster State Plane Coordinate System 1983 3200 34.33333333 36.16666667 36.16666667 33.75000000 2000000.00261667 0.0 coordinate pair 5.0 5.0 feet North American Datum of 1983 (2011) Geodetic Reference System 80 6378137 298.257222101 North American Vertical Datum of 1988 GEOID12a 0.01 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 Photo Science, USGS, NOAA, NCFMP, the Office for Coastal Management or its partners. This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5005 20160803 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 None. None. None. Unclassified NONE