2004 Florida Division of Emergency Management (FDEM) Lidar: Portion of Flagler County

This metadata record describes the LiDAR data that was collected for 147 square miles within part of Flagler County, Florida

during 28 February - 5 May 2004.

In 2008, because the final lidar dataset satisfied the accuracy requirements in the FDEM Baseline Specifications, the lidar

data was processed into .LAS files, and breaklines and contours were generated for the Florida Division of Emergency

Management (FDEM) using the existing lidar data from 2004.

Original contact information:

Contact Org: Florida DEM

Phone: 850-413-9907

Email: gis@dca.state.fl.us

Used in conjunction with breaklines to determine a DTM surface. The DTM was developed to support the Florida Division of

Emergency Management (FDEM) development and maintenance of Regional Evacuation Studies (Study), which include vulnerability

assessments and assist disaster response personnel in understanding threats to Florida's citizens and visitors.

10307

For additional information, the Minimum Technical Standard (MTS report) "Final Report of Specific Purpose LiDAR Survey - LiDAR

Generated Breaklines and Contours" may be viewed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/526/supplemental/index.html

Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management or its partners.

The data represent the results of data collection and processing for a specific Florida Division of Emergency Management activity

and indicates the general existing conditions at the time of the data collection. As such, it is only valid for its intended use,

content, time, and accuracy specifications. The user is responsible for the results of any application of the data for other than

its intended purpose.

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer;

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.

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.4.1420

The 3D breaklines inherit the accuracy of the Lidar it was acquired from. Lidar source was compiled to meet 1 m horizontal accuracy.; Quantitative Value: 1 meters, Test that produced the value:

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 adjoining flight lines to ensure LiDAR meets the 1 meter horizontal accuracy standard

at the 95% confidence level.

The 3D breaklines inherit the accuracy of the Lidar it was acquired from.; Quantitative Value: 0.18 meters, Test that produced the value:

Based on the vertical accuracy testing conducted by PDS, using NSSDA and FEMA methodology, vertical accuracy at the 95% confidence

level (called Accuracyz) is computed by the formula RMSEz x 1.9600.

The dataset for Flagler County, Florida satisfies the criteria:

Countywide lidar dataset tested 0.18 m(0.60 ft) vertical accuracy at 95% confidence level in open terrain,

based on open terrain RMSEz 0.31 ft) x 1.9600.

Countywide lidar dataset tested 0.27 m (0.88 ft) vertical accuracy at 95% confidence level in all land cover categories combined,

based on consolidated RMSEz (0.45 ft) x 1.9600.

A visual qualitative assessment was performed in the source Lidar dataset.

Data covers the tile scheme provided for the county.