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OCM Partners, 2024: 2006 Southwest Florida Water Management District (SWFWMD) Lidar: North District,

Item Identification

Title: 2006 Southwest Florida Water Management District (SWFWMD) Lidar: North District
Short Name: swfwmd_north_m65_metadata
Status: Completed
Publication Date: 2007-01-05

This data set is one component of a digital terrain model (DTM) for the Southwest Florida Water Management District's

FY2006 Digital Orthophoto (B089) and LiDAR Project (L470/L471), encompassing approximately 1,216 square miles across

Citrus and Sumter counties. The 2006 LiDAR dataset is comprised of 3-D masspoints delivered in the LAS file format

based on the District's 5,000' by 5,000' grid (1,356 cells). The other DTM component is 2-D and 3-D breakline features

in the ESRI ArcGIS Personal Geodatabase format. In accordance with the 2006 SWFWMD Topographic Database Design,

the following breakline features are contained within the database: closed water bodies (lakes, reservoirs, etc)

as 3-D polygons; linear hydrographic features (streams, canals, swales, embankments, etc) as 3-D breaklines;

coastal shorelines as 3-D linear features; edge of pavement road features as 3-D breakines; soft features

(ridges, valleys, etc.) as 3-D breaklines; obscured vegetation polygons as 2-D polygons; overpasses and bridges

as 3-D breaklines; 1-foot contours for visualization purposes; and island features as 3-D polygons. This data falls

in Citrus and Sumter Counties.

Intensity values, or the measure of reflectance of the laser are also captured.

Breakline features were captured to develop a hydrologically correct DTM. Contours (1-foot) were generated from

the DTM that meet the National Map Accuracy Standards for 2-foot contours (FEMA specifications). Bare earth LiDAR

masspoint data display a vertical accuracy of at least 0.3-feet root mean square error (RMSE) in open unobscured areas

Original contact information:

Contact Name: Mapping and GIS Section

Contact Org: Southwest Florida Water Management District

Phone: 352.796.7211


The DTM was developed to support the DISTRICT's regulatory, land management and acquisition, planning,

engineering, and habitat restoration projects



Supplemental Information:

Project Title: FY2006 Digital Orthophoto (B089) and LiDAR Project (L470/L471)

Purchase Order: 06PCSOW0471

Work Order Name: North District Ortho and LiDAR - Work Order 1

Vendor Name: Woolpert, Inc


Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
None Surface
None Terrain

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Distribution Liability:

Any conclusions drawn for the analysis of this information are not the

responsibility of the Office for Coastal Management or it's partners.

Support Roles

Data Steward

CC ID: 687466
Date Effective From: 2007-01-05
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


CC ID: 687468
Date Effective From: 2007-01-05
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Metadata Contact

CC ID: 687469
Date Effective From: 2007-01-05
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Point of Contact

CC ID: 687467
Date Effective From: 2007-01-05
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: date of collection

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1140227
W° Bound: -82.73904
E° Bound: -81.9411
N° Bound: 29.06432
S° Bound: 28.29512

Extent Group 1 / Time Frame 1

CC ID: 1140226
Time Frame Type: Discrete
Start: 2006-03-05

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Data Access Procedure:

This data can be obtained on-line at the following URL:


Data Access Constraints:


Data Use Constraints:

Users should be aware that temporal changes may have occurred since this data 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 it's limitations.

Distribution Information

Distribution 1

CC ID: 742657
Download URL:
File Name: Customized Download

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

Distribution 2

CC ID: 742658
Download URL:
File Name: Bulk Download

Simple download of data files.



CC ID: 742660
URL Type:
Online Resource


CC ID: 742661
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 687486
Activity Date/Time: 2016-05-23

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 687485
Activity Date/Time: 2017-11-14

Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using '' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 718626
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 742659
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

The intended hroizontal accuracy is consistent with features on digital

orthophotographs that meet National Map Accuracy Standards at a scale of 1:1200. 3.6 feet horizontal

accuracy at the 95% confidence level, not tested.

Vertical Positional Accuracy:

The intended vertical accuracy of this project is 0.59-feet (95% confidence level) vertical.

RMSE= 0.3 feet for unobscured points, not tested.

Completeness Measure:

Cloud Cover: 0

Completeness Report:

All elevation measurements within the bounding coordinates of this XML were used to derive this dataset.

Conceptual Consistency:

The LiDAR DTM was developed in accordance with the 2006 SWFWMD LiDAR specifications.

The DTM is intended to support 2-foot contours, and the vertical accuracy of ground points in unobscured areas

is 0.3-feet RMSE.



FY2006 Digital Orthophoto (B089) and LiDAR Project (L470/L471)

CC ID: 1140221
Publish Date: 2007-01-07
Extent Type: Discrete
Extent Start Date/Time: 2007-01-05
Source Contribution:

Unknown | Source Geospatial Form: model | Type of Source Media: Unknown

Process Steps

Process Step 1

CC ID: 1140222

The LiDAR data was acquired using a Leica ALS50 from an altitude of 2,400' above ground level to provide an

nominal ground sample distance of 2.4-feet. The scanner field of view was 28-degrees, and the scan rate was 46-hertz.

First and last return data was collected along with the signal return intensity. A total of 278 flights of LiDAR data

were acquired. Flight lines were flown with a 30% sidelap, providing a line-to-line swath width of 957-feet.

Thirty (30) Two redundant airborne GPS bases stations were utilized during the data acquisition with maximum

line-of-sight distance between the base station and aircraft of 20-km.

The LiDAR data was reduced using Grafnav (Waypoint Consulting) for GPS post-processing, PosProc (Applanix Crop) for

IMU processing, ALS50 Post Processor (LH Systems) to initial LiDAR processing, TerraScan (Terrasolid) for initial point

classification, and proprietary Woolpert developed software for refining the point classification and QC.

The LAS files contain 5 classifications: 1 = unclassified; 2 = ground; 9 = water; and 10 = photogrammetric mass

points and 11=swamp/wetland points. The class 1 consists of all points not on the ground. Class 2 consists of bare

earth points. Class 9 points are those points falling within lake/pond polygons. Class 10 consists of supplementary

mass points that were photogrametrically compiled on points features suchs as peaks or pits, and they were created to

maintain the accuracy of the DTM. Class 11 consists of points within swamps and/or wetlands polygons classified as ground.

For a complete description of survey methods, processing methods, software, system parameters, and accuracy analysis,

see the Florida MTS Report of Specific Purpose Survey, North District LiDAR DTM Project (L470/L471), dated January 2007.

Process Date/Time: 2007-01-05 00:00:00

Process Step 2

CC ID: 1140223

Metadata imported.

Process Step 3

CC ID: 1140224

The NOAA Office for Coastal Management (OCM) received the the files in LAS

format. The files contained Lidar elevation measurements. The data was in Florida State Plane Projection

and NAVD88 vertical datum. OCM performed the following processing to the data to make it available within

the Digital Coast Data Access Viewer (DAV):

1. The data were converted from Florida State Plane West coordinates to geographic coordinates.

2. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoid) heights using Geoid03.

3. The LAS data were sorted by latitude and the headers were updated.

Process Date/Time: 2008-01-01 00:00:00

Catalog Details

Catalog Item ID: 50024
GUID: gov.noaa.nmfs.inport:50024
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:23+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-08-09 17:11+0000
Metadata Record Published: 2022-03-16
Owner Org: OCMP
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2022-03-16
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2023-03-16