gov.noaa.csc.maps:2007_FDEM_Nassau_m557 Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Coastal Services Center (CSC) Florida Division of Emergency Management 2008 vector digital data Charleston, SC NOAA's Ocean Service, Coastal Services Center (CSC) http://csc-s-maps-q.csc.noaa.gov/dataviewer/viewer.html?keyword=lidar http://www.csc.noaa.gov/lidar http://www.csc.noaa.gov This report pertains to a Specific Purpose LiDAR Survey of Nassau County, Florida. The LiDAR aerial acquisition was conducted by Terrapoint USA between August 18, 2007 and September 4, 2007, and the breaklines and contours were subsequently generated by Dewberry. The PDS team is under contract HS-34-14-00-22-469 with the Florida Division of Emergency Management (FDEM) and offered LiDAR and derived products as an add-on agreement with Nassau County at the same rates as negotiated for the FDEM contract and utilizing the same Baseline Specifications from FDEM. The LiDAR dataset of Nassau County was acquired by Terrapoint USA and processed to a bare-earth digital terrain model (DTM) in accordance with FDEM Baseline Specifications. Detailed breaklines and contours were also produced by the PDS team. Each tile covers an area of 5000 ft by 5000 ft. The FDEM Baseline Specifications require a maximum LiDAR post spacing of 4 feet, i.e., an average point density of less than 1 point per square meter. However, the PDS team required a much higher point density of its subcontractors in order to increase the probability of penetrating dense foliage; with nominal post spacing of 0.7 meters per flight line and 50% sidelap between flight lines, the average point density is 4 points per square meter with higher point density there is a greater probability of penetrating dense vegetation and minimizing areas defined as "low confidence areas." LiDAR was delivered as a point cloud in LAS 1.1 format. These data support the Florida Division of Emergency Management's (FDEM) development and maintenance of Regional Evacuation Studies, which include vulnerability assessments and assist disaster response personnel in understanding threats to Florida's citizens and visitors. The Lidar QA/QC Quantitative and Qualitative Assessment Report for this data set may be viewed at: ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/fl/fdem/nassau/lidarqaqcreport_nassau_final.pdf A footprint of this data set may be viewed in Google Earth at: ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/fl/fdem/nassau/2007_FDEM_Lidar_Nassau_County.kmz 20070818 20071004 ground condition Complete As needed -84.748761 -84.083288 30.306119 29.962468 ISO 19115 Topic Category elevation None Bathymetry/Topography DTM Elevation Lidar None US Florida Nassau County 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. Florida DEM mailing and physical address

2555 Shumard Oak Boulevard

Tallahassee FL 32399-2100 USA 850-413-9907 850-488-1016 gis@dca.state.fl.us Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.1850 Data covers the tile scheme provided for the county. A visual qualitative assessment was performed to ensure the data completness against the intensity images derived from Lidar points. No void or missing data. Lidar source compiled to meet 1m horizontal accuracy. 1 The PDS team does not perform independent horizontal accuracy testing on the Lidar. Lidar vendors perform calibrations on the Lidar sensor and compare data to adjoing flight lines to ensure Lidar meets the 1 meter horizontal accuracy standard at the 95% confidence level. The LiDAR is required to meet .60 feet Fundamental Vertical Accuracy (FVA) and 1.19 feet Consolidated Vertical Accuracy (CVA). 0.60 Based on the vertical accuracy testing conducted by PDS, using NSSDA and FEMA guidelines, vertical accuracy at the 95% confidence level (called Accuracyz) is computed by the formula RMSEz x 1.9600. The dataset for Nassau County, Florida satisfies the criteria: Countywide lidar dataset tested .60 feet vertical accuracy at 95% confidence level in open terrain, based on open terrain RMSEz (.31') x 1.9600. Countywide lidar dataset tested .98 feet vertical accuracy at 95% confidence level in all land cover categories combined, based on consolidated RMSEz (.50') x 1.9600. Terrapoint USA 2007 Unknown vector digital data LiDAR Survey of Nassau County, Florida, conducted in 2007 in support of the Florida Division of Emergency Management (FDEM). online 20070818 20071015 ground condition Lidar data LiDAR dataset was used to create intensity stereopairs for 3D breakline compilation and for contour generation. The ABGPS, IMU, and raw Optech 3100ea LiDAR scans are integrated using Optech Incorporated's DASHMap, version 1.1 software, Terrascan software and Microstation software. The resultant file is in a LAS binary file format. The LAS file version 1.1 format can be easily transferred from one file format to another. It is a binary file format that maintains information specific to the LiDAR data (return#, intensity value, xyz, etc.). The resultant points are referenced to the NAD83 horizontal datum and GRS80 vertical datum. The date and time for each flight line can be determined using the Julian date and time. The Julian date is a continuous count of days and fractions since noon Universal Time on January 1, 4713 BCE on the Julian Calendar. Lidar data 2008 LiDAR Point Cloud LAS 1.1 format Terrapoint USA LiDAR Manager mailing and physical address

251216 Grogan's Park Drive

The Woodlands Texas 77380 USA 1-877-999-7687 1-281-296-0869 peggy.cobb@terrapoint.com Monday to Friday, 8 - 5, CST The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filters are applied as appropriate for the production of bare earth digital terrain models (dtms). Interactive editing methods are applied to those areas where it is inappropriate or impossible to use the feature extraction filters, based upon the design criteria and/or limitations of the relevant filters. These same feature extraction filters are used to produce elevation height surfaces. The LiDAR mass points were delivered in American Society for Photogrammetry and Remote Sensing LAS 1.1 format. The header file for each dataset is complete as define by the LAS 1.1 specification. In addition the following fields are included (Precision reported in brackets): Class (Integer); GPS Week Time (0.0001 seconds); Easting (0.01 meter); Northing (0.01 meter); Elevation (0.01 meter); Echo Number (Integer 1 to 4); Echo (Integer 1 to 4); Intensity (8 Bit Integer); Flightline (Integer); Scan Angle (Integer Degree). The LAS files do not include overlap. The data was classified as follows: Class 1 = Unclassified. This class includes vegetation, buildings, noise etc. Class 2 = Ground Class 7 = Noise Class 9 = Water LiDAR Point Cloud LAS 1.1 format 2008 Classified LiDAR datasets Terrapoint USA LiDAR Manager mailing and physical address

251216 Grogan's Park Drive

The Woodlands Texas 77380 USA 1-877-999-7687 1-281-296-0869 peggy.cobb@terrapoint.com Monday to Friday, 8 - 5, CST The NOAA Coastal Services Center (CSC) received the files in las format. The files contained Lidar elevation and intensity measurements. The data were in projected in Florida State Plane Coordinates (East Zone, NAD83/HARN), and referenced to the orthometric datum of NAVD88 utilizing Geoid 03. CSC performed the following processing to the data to make it available within the Digital Coast: 1. The data were converted from State Plane Coordinates (NAD83/HARN) coordinates to geographic coordinates (NAD83). 2. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoid) heights using Geoid 03. 3. The LAS data were sorted by latitude and the headers were updated. 20101020 NOAA Coastal Services Center Clearinghouse Manager mailing and physical

2234 South Hobson Ave.

Charleston SC 29405-2413 843-740-1210 clearinghouse@noaa.gov The NOAA National Geophysical Data Center (NGDC) received Lidar data files by ftp. The data received compressed containing LiDAR data from the NOAA Coastal Services Center. The data are currently being served via Digital Coastl at http://www.csc.noaa.gov/digitalcoast/. The data can be used to re-populate the system. The data are provided in LAS format. LAS format is an industry standard for serving LiDAR data. The data are exclusively in geographic coordinates, however, the datums used vary. Most are NAD 83, however some are in ITRF. Vertical systems include both ellipsoid (ITRF and NAD 83) and NAVD 88. For NAVD 88 values, Geiod 03 is primarily used; however, data received in NAVD 88 prior to 2003 was processed using Geoid 99. 20110919 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Pamela Grothe Mailing and Physical Address

NOAA/NESDIS/NGDC E/GC1 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6120 (303) 497-6958 (303) 497-6513 pamela.grothe@noaa.gov 7:30-5:00 Mountain Contact Data Center Point 0.0000001 0.0000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Ellipsoid 0.001 Meters Explicit elevation coordinate included with horizontal coordinates LAS Lidar point cloud LAS 1.1 format "Florida GIS - Baseline Specifications for Orthophotography and LiDAR v1.2" NOAA Coastal Services Center Clearinghouse Manager mailing and physical

2234 South Hobson Ave.

Charleston SC 29405-2413 843-740-1210 clearinghouse@noaa.gov Downloadable Data Any conclusions drawn from the analysis of this information are not the responsibility of the Coastal Services Center or its partners. DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce Pamela Grothe Mailing and Physical Address

NOAA/NESDIS/NGDC E/GC1 325 Broadway

Boulder CO 80305-3328 USA (303) 497-6120 (303) 497-6958 (303) 497-6513 pamela.grothe@noaa.gov 7:30-5:00 Mountain Contact Data Center Disclaimer While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. The National Geophysical Data Center serves as the archive for this LIDAR data. NGDC should only be contacted for this data if it cannot be obtained from NOAA Coastal Services Center. 20110919 20110919 20120919 NOAA Coastal Services Center Clearinghouse Manager mailing and physical

2234 South Hobson Ave.

Charleston SC 29405-2413 843-740-1210 clearinghouse@noaa.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998