Florida Division of Emergency Management
Unknown
Unknown
LAS
vector digital data
Tallahassee, FL
Florida Division of Emergency Management
The Light Detection and Ranging (LiDAR) LAS dataset is a topographic survey conducted for the State of Florida Division of Emergency Management LiDAR Project. These data were produced for Florida Division of Emergency Management. Block 8 of the State of Florida Division of Emergency Management LiDAR Project consists of approximately 398 tiles. The LiDAR point cloud was flown at a density sufficient to support a maximum final post spacing of 4 feet for unobscured areas. 3001 Inc. acquired 181 flightlines August 31, 2007 through October 11, 2007. The data was divided into 5000' by 5000' cells that serve as the final tiling scheme. The State of Florida Division of Emergency Management LiDAR Survey was collected under the guidance of a Professional Mapper /Surveyor.
The State of Florida Division of Emergency Management LiDAR Project Survey data will support the creation of Federal Emergency Management Agency Flood Insurance Rate Maps (FEMA FIRM) and an integrated ground and surface water model. The State of Florida Division of Emergency Management LiDAR Survey was collected under the guidance of a Licensed and Professional Surveyor/Mapper.
The metadata is not FGDC compliant if copies of the survey report in PDF format are not delivered as an attachment. The information in this report is the result of the LiDAR surveys performed on the dates indicated and the general conditions at that time.
20070831
unknown
20080918
unknown
ground condition
None planned
-81.817493
-81.188055
24.813897
24.544017
None
Contour
DEM
DSM
DTM
Elevation
Height
Photogrammetry
Planemetric
TIN
Stereo Photogrammetry
LAS V.1.1 LiDAR
digital elevation model
Topography
None
Florida
Miami
None
None
None
None
None
These unaltered data may not be redistributed without all of the elements of the metadata listed in the Supplemental Information section of this metadata document. Acknowledgement of Florida Division of Emergency Management would be appreciated in products derived from these data.
3001 Inc
LiDAR Department
mailing and physical address
501 Robert Blvd
2nd Floor
Slidell
Louisiana
70458
USA
(985) 661 - 3001
(985) 649 - 5082
lidar@3001inc.com
8:00 - 5:00 CDT
Florida Division of Emergency Management
Unclassified
Unclassified
Unclassified
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.0.1324
Florida Division of Emergency Management
Unknown
Unknown
State of Florida Division of Emergency Management LiDAR Project LAS Dataset
remote-sensing image
Tallahassee, FL
Florida Division of Emergency Management
The State of Florida Division of Emergency Management LiDAR survey was collected under the guidance of a Professional Mapper Surveyor. The data was collected ata density sufficient to support a maximum final post spacing of 4 feet for unobscured areas.
The Light Detection and Ranging (LiDAR) LAS dataset is a topographic survey conducted for the State of Florida Division of Emergency Management LiDAR Project. These data were produced for Florida Division of Emergency Management. Block 8 of the State of Florida Division of Emergency Management LiDAR Project consists of approximately 398 tiles. The LiDAR point cloud was flown at a density sufficient to support a maximum final post spacing of 4 feet for unobscured areas. 3001 Inc. acquired 181 flightlines August 31, 2007 through October 11, 2007. The data was divided into 5000' by 5000' cells that serve as the final tiling scheme. The State of Florida Division of Emergency Management LiDAR Survey was collected under the guidance of a Professional Mapper /Surveyor.
The LAS files were flown at a density sufficient to support a maximum final post spacing of 4 feet for unobscured areas. The bare-earth surface will contain voids in areas that were densely vegetated, covered by bridges, buildings, water, fresh asphalt, sand etc.
All ground control processing and adjustment is performed using published coordinate horizontal and vertical datums (e.g. NGS CORS). For deliverables, Corpscon for Windows Version 5.11.08 (geoid 03) was used for horizontal and vertical datum conversion as well as for coordinate system conversion purposes (e.g. UTM to State Plane).
3.8 ft
See entity and attribute information
The accuracy assessment was performed using a standard method to compute the root mean square error (RMSE) based on a comparison of ground control points (GCP) and filtered LiDAR data points. Filtered LiDAR data has had vegetation and cultural features removed and by analysis represents bare-earth elevations. The RMSE figure was used to compute the vertical National Standard for Spatial Data Accuracy (NSSDA). Ground control was established by 3001, Inc. A spatial proximity analysis was used to select edited LiDAR data points contiguous to the relevant GCPs. A search radius decision rule is applied with consideration of terrain complexity, cumulative error and adequate sample size. Cumulative error results from the errors inherent in the various sources of horizontal measurement. These sources include the airborne GPS, GCPs and the uncertainty of the accuracy of the LiDAR data points. This accuracy is achieved prior to the sub-sampling that occurs through integration with the inertial measurement unit (IMU) positions that are recorded. It is unclear at this time whether the initial accuracy is maintained. The horizontal accuracy of the GCPs is estimated to be in the range of approximately 1 to 1.6 inches. Finally, sample size was considered. The specification for the National Standard for Spatial Data Accuracy is a minimum of 20 points to conduct a statistically significant accuracy evaluation (Minnesota Planning, 1999, Positional Accuracy Handbook, Minnesota Planning Land Management Information Center, St. Paul, Minnesota., p.3). Most statistical texts indicate that a minimum of 30 sample points provide a reasonable Approximation of a normal distribution. The intent of the NSSDA is to reflect the geographic area of interest and the distribution of error in the data set (Federal Geographic Data Committee, 1998, Geospatial National Standard for Spatial Data Accuracy, Federal Geographic Data Committee Secretariat, Reston, Virginia, p.3-4). Additional steps were taken to ensure the vertical accuracy of the LiDAR data including: Step 1: Precision Bore sighting (Check Edge-matching) Step 2: Compare the LiDAR data to the Field Survey (Field survey is to FEMA specifications and more stringent internal specifications) Step 3: Automated Filtering Step 4: Manual Editing (Quality Control) Step 5: 3-D digitizing and Photogrammetric Compilation of hydrographic breaklines
0.6 ft
See entity and attribute information
Florida Division of Emergency Management
Unknown
Unknown
State of Florida Division of Emergency Management LiDAR Project Survey
vector digital data
Tallahassee, FL
Florida Division of Emergency Management
24000
digital tape media
20070831
unknown
20071011
unknown
ground condition
scale map
The Light Detection and Ranging (LiDAR) LAS dataset is a topographic survey conducted for the State of Florida Division of Emergency Management LiDAR Project. These data were produced for Florida Division of Emergency Management. Block 8 of the State of Florida Division of Emergency Management LiDAR Project consists of approximately 398 tiles. The LiDAR point cloud was flown at a density sufficient to support a maximum final post spacing of 4 feet for unobscured areas. 3001 Inc. acquired 181 flightlines August 31, 2007 through October 11, 2007. The data was divided into 5000' by 5000' cells that serve as the final tiling scheme. The State of Florida Division of Emergency Management LiDAR Survey was collected under the guidance of a Professional Mapper /Surveyor.
The Airborne Global Position System (ABGPS), inertial measurement unit (IMU), and raw scans are collected during the LiDAR aerial survey. The ABGPS monitors the xyz position of the sensor and the IMU monitors the orientation of the aircraft. During the aerial survey laser pulses reflected from features on the surface and are detected by the receiver optics and collected by the data logger. GPS locations are based on data collected by receivers on the aircraft and base stations on the ground. The ground base stations are placed no more than 20 km radius from the flight survey area.
Leica ALS50
Airborne Global Positioning System
Inertial Measuring Unit
Global Positioning System
20071011
LiDAR Scan Files
LiDAR Scans, GPS data
3001 Inc.
LiDAR Department
mailing and physical address
501 Robert Blvd
2nd Floor
Slidell
Louisiana
70458
USA
(985) 661 - 3001
(985) 649 - 5082
lidar@3001inc.com
8:00 - 5:00 CDT
The ABGPS, IMU, and raw scans are integrated using proprietary software developed by the Leica Geosystems and delivered with the Leica ALS50 System. 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 produced in the Florida State Plane East Zone coordinate system, with units in feet and referenced to the NAD83/90 HARN horizontal datum and NAVD88 vertical datum.
Airborne Global Positioning System Data
Inertial Measurement Unit
LiDAR Scans
20071011
State of Florida Division of Emergency Management LiDAR Project (Pilot Area) Point Cloud data sets LAS 1.1 file format
3001 Inc.
LiDAR Department
mailing and physical address
501 Robert Blvd
2nd Floor
Slidell
Louisiana
70458
USA
(985) 661 - 3001
(985) 649 - 5082
lidar@3001inc.com
8:00 - 5:00 CDT
The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filters is 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.
Point Cloud LiDAR LAS 1.1 format
20080306
Filtered Data LiDAR datasets
3001 Inc.
LiDAR Department
mailing and physical address
501 Robert Blvd
2nd Floor
Slidell
Louisiana
70458
USA
(985) 661 - 3001
(985) 649 - 5082
lidar@3001inc.com
8:00 - 5:00 CDT
Filtered and edited data are subjected to rigorous QA/QC according to the 3001 Inc. Quality Control Plan and procedures. Very briefly, a series of quantitative and visual procedures are employed to validate the accuracy and consistency of the filtered and edited data. Ground control is established by 3001, Inc. and GPS-derived ground control points (GCPs) points in various areas of dominant and prescribed land cover. These points are coded according to landcover, surface material and ground control suitability. A suitable number of points are selected for calculation of a statistically significant accuracy assessment as per the requirements of the National Standard for Spatial Data Accuracy. A spatial proximity analysis is used to select edited LiDAR data points within a specified distance of the relevant GCPs. A search radius decision rule is applied with consideration of terrain complexity, cumulative error and adequate sample size. Accuracy validation and evaluation is accomplished using proprietary software to apply relevant statistical routines for calculation of Root Mean Square Error (RMSE) and the National Standard for Spatial Data Accuracy (NSSDA) according to Federal Geographic Data Committee (FGDC) specifications.
Filtered LiDAR data LAS 1.1 format
20080901
Quality verified bare-earth data set LAS 1.1 file format
3-D hydrologic breaklines
Classified LiDAR dataset
3001 Inc.
LiDAR Department
mailing and physical address
501 Robert Blvd.
2nd Floor
Slidell
Louisiana
70458
USA
(985) 661 - 3001
(985) 649 - 5082
lidar@3001inc.com
8:00 - 5:00 CDT
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: Flight Date Julian, Year, and Class. The data were classified as follows: Class 1 = Unclassified- this class includes vegetation, buildings, noise etc.; Class 2 = Ground; Class 7 = Noise; Class 9 = Water; Class 12 = Overlap. The datasets were delivered in the 5000' by 5000' tiling scheme. The tiles are suitable for seamless topographic data mosaics that include no "no data" areas. The names of the tiles are left padded with zeros as required to achieve a six character length and all files utilize the LAS file extension.
Filtered LiDAR dataset
Bare-Earth LiDAR dataset
20080918
3-D Masspoint Feature
3001 Inc.
LiDAR Department
mailing and physical address
501 Robert Blvd
2nd Floor
Slidell
Louisiana
70458
USA
(985) 661 - 3001
(985) 649 - 5082
lidar@3001inc.com
8:00 - 5:00 CDT
0
Tallahassee, FL
Vector
Point
29719
Transverse Mercator
0.999941
-81.000000
24.333333
656166.666667
0.000000
coordinate pair
0.000328
0.000328
survey feet
D_North_American_1983_HARN
Geodetic Reference System 80
6378137.000000
298.257222
North American Vertical Datum of 1988
0.000328
Feet
Explicit elevation coordinate included with horizontal coordinates
LAS
LiDAR dataset LAS V 1.1
Florida GIS Baseline Specification for Orthophotography and LiDAR V 1.2
Florida Division of Emergency Management
mailing and physical address
2555 Shumard Oak Blvd
Tallahassee
FL
32399-2100
USA
850-413-9969
800-226-4329 (TDD/TTY)
800-226-4329
Downloadable Data
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.
To be determined
To be determined by FDEM
To be determined by FDEM
To be determined by FDEM
Unknown
Unknown
unknown
20080918
20080918
3001 Inc.
3001 Inc.
LiDAR Department
mailing and physical address
501 Robert Blvd
2nd Floor
Slidell
Louisiana
70458
USA
(985) 661 - 3001
(985) 649 - 5082
lidar@3001inc.com
8:00 - 5:00 CDT
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
None
None
Unclassified
Unclassified
None Specified
200901271139070020090127