2005 Southwest Florida Water Management District (SWFWMD) Lidar: Manatee District
Dataset Identification:
Resource Abstract:
The Light Detection and Ranging (LiDAR) LAS dataset is a survey of select areas within Southwest Florida. These data were
produced for the Southwest Florida Water Management District (SWFWMD). The Manatee / Little Manatee LiDAR Survey project area
consists of approximately 176 square miles. This data set falls in Manatee County. The LiDAR point cloud was flown at a density
sufficient to support a maximum final post spacing of 6 feet for unobscured areas. 3001 inc. acquired 445 flightlines between
February 11, 2005 and April 14, 2005. The data was divided into 5000' by 5000' foot cells that serve as the tiling scheme.
The Manatee / Little Manatee LiDAR Survey was collected under the guidance of a Professional Mapper/Surveyor.
Citation
Title 2005 Southwest Florida Water Management District (SWFWMD) Lidar: Manatee District
publication Date
2006-01-01
cited responsible party
-
publisher
organisation Name
NOAA's Ocean Service, Office for Coastal Management (OCM)
Contact information
Address
, Charleston, SC
cited responsible party
-
originator
organisation Name
Southwest Florida Water Management District (SWFWMD)
other Citation Details
Cinergi keyword enhanced at Fri Nov 11 05:19:01 UTC 2016
purpose:
The Southwest Florida Water Management District uses topographic information to support regulatory, land management and acquisition,
planning, engineering, and habitat restoration projects. The Manatee / Little Manatee LiDAR 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
for the Peace River Watershed. All data will be public record as defined by applicable Florida statutes. The Manatee / Little
Manatee LiDAR Survey was collected under the guidance of a licensed and professional Surveyor and Mapper.
Resource language:
eng; USA
Resource progress code:
completed
Resource Maintenance Information
maintenance or update frequency:
notPlanned
Constraints on resource usage:
Constraints
Use limitation statement:
Any conclusions drawn for the analysis of this information are not the responsibility of the Office for Coastal Management
or its partners.
Constraints on resource usage:
Legal Constraints
use constraint:
otherRestrictions
Other constraints
Use Constraints: 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.
3001 inc. also acquired 97 flightlines between April 3, 2005 and April 11, 2005 for the Little Manatee District data set.
The information in this report is the result of the LiDAR surveys performed on the dates indicated and the general conditions
at the time. The Little Manatee and Manatee Ground Control Survey Report may be viewed at: ftp://coast.noaa.gov/pub/DigitalCoast/lidar1_z/geoid12a/data/66/supplemental
Credits:
Southwest Florida Water Management District
point of contact
-
pointOfContact
organisation Name
Southwest Florida Water Management District (SWFWMD)
Contact information
Telephone
Voice 352-796-7211
Fax (985) 649 - 5082
Address
2379 Broad Street, Brooksville, FL, 34604
Country USA
source description
Source Contribution: The Manatee / Little Manatee LiDAR Survey was acquired for the Southwest Florida Water Management District
and processed by 3001, Inc. Source Type Digital tape media
representative resolution scale:
Scale denominator: 24000
source citation
Title Manatee / Little Manatee LiDAR Survey
publication Date
presentationForm
imageDigital
cited responsible party
-
originator
organisation Name
Southwest Florida Water Management District
Resource extent
Temporal Extent
2005-01-01
AbsoluteExternalPositionalAccuracy
name Of Measure Horizontal Positional Accuracy Report
evaluation Method Description
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 99) was used for horizontal and vertical datum conversion
as well as for coordinate system conversion purposes (e.g. UTM to State plane). Compiled to meet 1.0 meter horizontal accuracy
at the 95% confidence level.
AbsoluteExternalPositionalAccuracy
name Of Measure Vertical Positional Accuracy Report
evaluation Method Description
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. Testing was performed prior to gridding of the filtered LiDAR data
points and construction of the Intergraph .dtm file format. 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 subsampling 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 RMSE
is 4.75 cm (0.156 feet) and the Vertical Accuracy is 9.33 cm (0.306 feet) at the 95% confidence level.
Completeness Commission
evaluation Method Description
The LAS files were flown at a density sufficient to support a maximum final post spacing of 6 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.
Completeness Omission
evaluation Method Description
The LAS files were flown at a density sufficient to support a maximum final post spacing of 6 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.
ConceptualConsistency
measure Description
The LAS files were flown at a density sufficient to support a maximum final post spacing of 6 feet for unobscured areas. 3001
inc. also acquired 97 flightlines between April 3, 2005 and April 11, 2005 for the Little Manatee District data set. The data
was divided into 5000' by 5000' foot cells that serve as the tiling scheme. The Manatee / Little Manatee LiDAR Survey was
collected under the guidance of a Professional Mapper/Surveyor.
notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version
FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
notes: Last Metadata Review Date: 2008-02-27
Metadata contact
-
pointOfContact
organisation Name
NOAA Office for Coastal Management
Contact information
Telephone
Voice 843-740-1202
Address
2234 South Hobson Avenue, Charleston, SC, 29405-2413