2015 USACE NCMP Topobathy Lidar DEM: Florida Gulf Coast

These files contain rasterized bare earth bathymetric and topographic lidar elevations generated from data with a Hawkeye III (HEIII) lidar sensor. The HEIII integrates topographic, shallow water, and deep water bathymetric lidar sensors along with a digital camera on a single remote sensing platform for use in coastal mapping and charting activities. Bathymetric lidar data were required 1000 m seaward of the land/water interface or to laser extinction (whichever came first), while topographic lidar data were required 500 m inland of the land/water interface. Data coverage generally extends along the gulf coast of Florida from Ft. Walton Beach to Mexico Beach and from Anclote Key to Marco Island. In addition to the bare earth DEMs, the topobathy lidar point data are also available. These data are available for download here: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5183 DEMs that were created from all classes of points (1, 2, 29) at a 1 meter grid size are available by request via email at: coastal.info@noaa.gov.

Original contact information:

Contact Org: JALBTCX

Title: Data Production Manager

Phone: 228-252-1121

Email: JALBTCX@usace.army.mil

These data were collected as a part of the NCMP to depict the elevations above and below water in the Florida coastal zone.

12003

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. Any conclusions drawn from the analysis of this information are not the responsibility of JALBTCX, the NOAA 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=5190

;

None. 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.

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. 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.

Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.0.3035

These data are not attributed. | Quantitative Value: N/A | Quantitative Test Explanation: These data are not attributed.

Compiled to meet 1 m horizontal RMSE at 95% confidence level.

HawkEye III topographic data - Tested 9.5 cm vertical RMSE at 95% confidence level.

HawkEye III bathymetric shallow FOV data - Tested 12.5 cm vertical RMSE at 95% confidence level.

HawkEye III bathymetric deep FOV data - Tested 20 cm vertical RMSE at 95% confidence level.

This data set covers the spatial extent of topographic lidar data obtained during this survey.

During inspection and QC of the lidar point cloud, flightline to flightline elevation differences met the HawkEye III sensor specifications.