49675
2007 Florida Division of Emergency Management (FDEM) Lidar Project: Levy County
fdem2007_levy_m530_metadata
Data Set
Published / External
49401
Lidar - partner (no harvest)
Project
Completed
2008
This Light Detection and Ranging (LiDAR) LAS dataset is a topographic survey conducted for a coalition of GIS practitioners,
including the Florida Division of Emergency Management (FDEM), Florida Water Management Districts, Florida Fish and Wildlife
Conservation Commission, Florida Department of Environmental Protection, Army Corps of Engineers Jacksonville District, and
other state and federal agencies. The goal for this project is to use the LiDAR data as new elevation inputs for updated SLOSH
data grids. The ultimate result is the update of the Regional Hurricane Evacuation Studies (RHES) for the state. The State of Florida
Division of Emergency Management LiDAR Survey was collected under the guidance of a Professional Mapper/Surveyor.
This data was collected for a portion of Levy County, Florida from 1 July - August 16 2007. This is a classified lidar data set;
bare-earth points (class 2), water returns (class 9), and unclassified data (class 1). The LiDAR data was flown at a density sufficient
to support a maximum final post spacing of 4 feet for unobscured areas.
A footprint of this data set may be viewed in Google Earth at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/530/supplemental/FDEM_Lidar_Levy_County.kmz
Original contact information:
Contact Org: Florida Division of Emergency Management (FDEM)
Phone: 850-413-9907
Email: gis@dca.state.fl.us
The LiDAR topographic mapping survey is to support the Florida Division of Emergency Management (FDEM) development and maintenance
of Regional Hurricane Evacuations Studies (RHES), which include vulnerability assessments, and to assist disaster response
personnel in understanding the threats to Florida's citizens and visitors. Additional intended uses for this survey are growth
management, map modernization/floodplain mapping, natural lands stewardship, and homeland security planning.
10319
A complete description of this dataset is available in the Minimum Technical Standard (MTS report) "Final Report of
Specific Purpose LiDAR Survey - LiDAR, Breaklines, and Contours for Levy County, Florida" submitted to Florida Division of
Emergency Management.
This report may be accessed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/530/supplemental/Levy_County_FL_Lidar_Survey_Report.pdf
Theme
ISO 19115 Topic Category
elevation
Office for Coastal Management
Charleston
SC
Data Set
As Needed
Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management
or its partners.
Data Steward
2008
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2008
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2008
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2008
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-83.177942
-82.614342
29.59827
29.02177
Range
2007-07-01
2007-08-16
Yes
Unclassified
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.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=530
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/530/index.html
Bulk Download
Simple download of data files.
https://coast.noaa.gov
Online Resource
https://coast.noaa.gov/dataviewer
Online Resource
2016-05-23
Date that the source FGDC record was last modified.
2017-11-14
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details.
2018-02-08
Partial upload of Positional Accuracy fields only.
2018-03-13
Partial upload to move data access links to Distribution Info.
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.5.1450
Lidar source compiled to meet 1m 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 LiDAR was required to meet 0.60 feet Fundamental Vertical Accuracy (FVA) and 1.19 feet Consolidated Vertical Accuracy (CVA).; Quantitative Value: 0.177 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 Levy County, Florida
satisfies the criteria:
Countywide lidar dataset tested 0.58 ft (17.7 cm) vertical accuracy at 95% confidence level in open terrain, based on open terrain
RMSEz (0.30 ft) x 1.9600.
Countywide lidar dataset tested 0.86 ft (26.2 cm) vertical accuracy at 95% confidence level in all land cover categories combined,
based on consolidated RMSEz (0.44 ft) x 1.9600.
Please refer to the Supplemental_Information field above for the link to the "Final Report of Specific Purpose LiDAR Survey
- LiDAR, Breaklines, and Contours for Levy County, Florida" for a very detailed report about this data set.
A visual qualitative assessment was performed in the source Lidar dataset.
Data covers the tile scheme provided for the county.
Lidar
2008-05-01
Range
2007-07-01
2007-08-16
LiDAR dataset was used to create intensity stereo pairs for 3D breakline compilation and for contour generation.
| Source Geospatial Form: vector digital data | Type of Source Media: online
1
The ABGPS, IMU, and raw Leica ALS-50 LiDAR data are integrated into the LEICA ALS post processor software. The resultant
file is in a LAS binary file format. The LAS file version 1.1 formats 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 produced in the geodetic coordinates 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.
2008-01-01T00:00:00
2
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 defined by the LAS 1.1 specification. In addition
the following fields are included: Flight Date Julian, Year, and Class. 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 9 = Water
2008-01-01T00:00:00
3
Conversion from Geodetic coordinates, NAD83 into State Plane coordinates (U.S. Survey Feet) NAD83 HARN and conversion from
ellipsoid heights (meters) into orthometric heights (U.S. Survey Feet).
2008-01-01T00:00:00
4
The NOAA Office for Coastal Management (OCM) received files in LAS format. The files contained LiDAR intensity and elevation measurements.
OCM performed the following processing on the data to make it available within Digital Coast:
1. The data were converted from State Plane Florida West coordinates to geographic coordinates.
2. The data were converted from NAVD88 heights to ellipsoid heights using Geoid03.
3. The LAS header fields were sorted by latitude and updated.
2010-01-01T00:00:00
gov.noaa.nmfs.inport:49675
Anne Ball
2017-11-15T15:21:34
SysAdmin InPortAdmin
2022-08-09T17:11:37
2022-03-16
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16