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Short Citation:
OCM Partners, 2022: 2005-2006 Southwest Florida Water Management District (SWFWMD) Lidar: Polk County (Including Hampton, Judy, Lake Wales, Peace River (North), and Polk District Remainder Tracts), https://www.fisheries.noaa.gov/inport/item/50027.

Item Identification

Title: 2005-2006 Southwest Florida Water Management District (SWFWMD) Lidar: Polk County (Including Hampton, Judy, Lake Wales, Peace River (North), and Polk District Remainder Tracts)
Short Name: swfwmd_polk_m71_metadata
Status: Completed
Abstract:

This data set is one component of a digital terrain model (DTM) for the SWFWMD Polk District. This record includes information

about the LiDAR data for the following SWFWMD tracts: Hampton, Judy, Lake Wales, Peace River (North) and Polk Remainder. All of these

tracts are located in Polk County. Please see the Bounding Coordinates for each tract for the location within Polk County. Information

that is specific to each tract has been maintained.

HAMPTON TRACT

This data set is one component of a digital terrain model (DTM) for Hampton Tract, Polk County, Florida encompassing approximately 43

square miles. This dataset is comprised of 48 LiDAR files, based on the DISTRICT 5,000' by 5,000' sheet index system (17951-17958,

18114-18121, 18363-18370, 18526-18533, 18259-18266 and 18594-18601) in the LAS file format. The raw data was collected at an average

ground sample distance of 1-meter. Other components of the DTM include: 3-D breaklines along hydrographic features in the Shape file

format; lake/pond polygons (in 3D) in the shape file format; obscured area polygons (in 2D) in the Shape file format; and hard/soft

breaklines (in 3D) in the Shape file format.

Date of Collection: 20060125

Bounding Coordinates of tract:

West Bounding Coordinate: -82.035984

East Bounding Coordinate: -81.903345

North Bounding Coordinate: 28.328847

South Bounding Coordinate: 28.238391

JUDY TRACT

This data set is one component of a digital terrain model (DTM) for Judy Tract, Polk County, Florida encompassing approximately

12.6 square miles. This dataset is comprised of 14 LiDAR files, based on the DISTRICT 5,000' by 5,000' sheet index system

(17632-17636, 17795-17799, and 17959-17962) in the LAS file format. The raw data was collected at an average ground sample distance

of 1-meter. Other components of the DTM include a personal geodatabase containing: obscured vegetation polygons; road overpass

polygons; road breaklines; soft feature breaklines; water body polygons; coastal shorelines; 1-foot contours; hydrographic feature

breaklines, and island polygons in accordance with the SWFWMD 2006 Topographic Database Design.

Date of Collection: 20060125

Bounding Coordinates of tract:

West Bounding Coordinate: -81.925929

East Bounding Coordinate: -81.848175

North Bounding Coordinate: 28.350110

South Bounding Coordinate: 28.308789

LAKE WALES

This data set is one component of a digital terrain model (DTM) for Lake Wales, Polk County, Florida encompassing approximately

10.75 square miles. This dataset is comprised of 12 LiDAR files, based on the DISTRICT 5,000' by 5,000' sheet index system

(22365-22367, 22528-22530, 22691-22693 and 22854-22856) in the LAS file format. The raw data was collected at an average ground

sample distance of 1-meter. Other components of the DTM include: 3-D breaklines along hydrographic features in the Shape file

format; lake/pond polygons (in 3D) in the shape file format; obscured area polygons (in 2D) in the Shape file format; and hard/soft

breaklines (in 3D) in the Shape file format.

Date of Collection: 20060125

Bounding Coordinates of tract:

West Bounding Coordinate: -81.543294

East Bounding Coordinate: -81.509932

North Bounding Coordinate: 27.916603

South Bounding Coordinate: 27.868213

PEACE RIVER (NORTH)

This data set is one component of a digital terrain model (DTM) for Peace River North (P692), Polk County, Florida encompassing

approximately 1,149 square miles. This dataset is comprised of 1,281 LiDAR files, based on the DISTRICT 5,000' by 5,000' sheet

index system in the LAS file format. The raw data was collected at an average ground sample distance of 1-meter. Other components

of the DTM include: 3-D breaklines along hydrographic features in the Shape file format; lake/pond polygons (in 3D) in the shape

file format; obscured area polygons (in 2D) in the Shape file format; and hard/soft breaklines (in 3D) in the Shape file format.

Date of Collection: 20060227

Bounding Coordinates of tract:

West Bounding Coordinate: -82.035984

East Bounding Coordinate: -81.903345

North Bounding Coordinate: 28.328847

South Bounding Coordinate: 28.238391

POLK DISTRICT REMAINDER

This dataset is one component of a digital terrain model (DTM) for the Southwest Florida Water Management District's FY2007

Remainder Polk District LiDAR Mapping Project and Polk District Contours Project (L672) encompassing approximately 428 square miles

in Polk County, Florida. This dataset is comprised of 478 LiDAR files, based on the FL Statewide 5,000' by 5,000' sheet index system

in the LAS version 1.1 file format. LiDAR acquisition dates were January 27, January 30 through February 20, 2005. The raw data was

collected at an average ground sample distance of 2.1 feet. Other components of the DTM include a personal geodatabase in accordance

with the SWFWMD 2006 Topographic Database Design containing: obscured vegetation polygons; road overpass polygons; road breaklines;

soft feature breaklines; water body polygons; coastal shorelines; hydrographic features breaklines; island polygons; and 1-foot

contours. Final products include FEMA-compliant LIDAR-derived DTM data and 1-foot contours (for cartographic visualization purposes

only) meeting or exceeding National Map Accuracy Standards for 2-foot contours. This area is not a tract, but an addition of areas

to the Polk District data set. This data set consists of three areas within Polk County. The approximate bounding coordinates for

each area are given below. Area 3 borders the east and north sides of the Peace River (North) and Judy Tract data sets. The bounding

coordinates for Area 3 are generalized here, but it is actually a multi-sided polygon with many vertices.

Date of Collection: 20050127, 20050130-20050220

Bounding Coordinates of Area 1: Area 2 Area 3

West Bounding Coordinate: -82.104809 -81.958339 -81.934587

East Bounding Coordinate: -82.033554 -81.918752 -81.380374

North Bounding Coordinate: 28.314262 28.349889 28.397394

South Bounding Coordinate: 28.171749 28.322179 27.625454

Original contact information:

Contact Name: Ekaterina Fitos

Contact Org: Southwest Florida Water Management District

Title: GIS Analyst 2

Phone: (352) 796-7211

Email: Ekaterina.Fitos@swfwmd.state.fl.us

Purpose:

The DTM was developed to support the Districts regulatory, land management and acquisition, planning, engineering, and habitat

restoration projects.

Notes:

10671

Supplemental Information:

The Survey Report for Polk District Remainder tract may be viewed at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/71/supplemental/index.html

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
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 its partners.

Support Roles

Data Steward

CC ID: 687582
Date Effective From: 2017-03-20
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Distributor

CC ID: 687584
Date Effective From: 2017-03-20
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Metadata Contact

CC ID: 687585
Date Effective From: 2017-03-20
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Point of Contact

CC ID: 687583
Date Effective From: 2017-03-20
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address: coastal.info@noaa.gov
Phone: (843) 740-1202
URL: https://coast.noaa.gov

Extents

Currentness Reference: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1140332
W° Bound: -82.081057
E° Bound: -81.364396
N° Bound: 28.357807
S° Bound: 27.629413

Extent Group 1 / Time Frame 1

CC ID: 1140331
Time Frame Type: Range
Start: 2005-01-27
End: 2006-02-27

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: https://coast.noaa.gov/dataviewer;

Data Access Constraints:

None

Data 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.

Distribution Information

Distribution 1

CC ID: 742672
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=71
Distributor:
File Name: Customized Download
Description:

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

Distribution 2

CC ID: 742673
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/71/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 742675
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 742676
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 687606
Activity Date/Time: 2017-03-20
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 687605
Activity Date/Time: 2017-11-14
Description:

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.

Activity Log 3

CC ID: 718629
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 742674
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

HAMPTON TRACT, JUDY TRACT, LAKE WALES, PEACE RIVER (NORTH)

The intended horizontal accuracy is consistent with features on digital orthophotographs that meet National Map Accuracy Standards

at a scale of 1:1200. Compiled to meet 1.1 m (3.6-feet) horizontal accuracy at the 95% confidence level, not tested.

POLK COUNTY REMAINDER

Horizontal accuracy shall be tested to meet or exceed a 1.37 m (4.5 foot) horizontal accuracy at 95 percent confidence level using

RMSE(r) x 1.7308 as defined by the National Standard for Spatial Data Accuracy (NSSDA).

Vertical Positional Accuracy:

JUDY TRACT, HAMPTON TRACT, LAKE WALES, PEACE RIVER (NORTH)

The intended vertical accuracy of this project is 17.98 cm (0.59-feet) at the 95% confidence level.

RMSE = 9.14 cm (0.3 feet) for unobscured ground points, not tested.

POLK DISTRICT REMAINDER

Vertical accuracy shall be tested to meet or exceed an 18.29 cm (0.6 foot) vertical accuracy at 95 percent confidence level using

RMSE(r) x 1.9600 as defined by the National Standard for Spatial Data Accuracy (NSSDA).

RMSE = 13.72 cm (0.45 feet) for unobscured ground 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.

Lineage

Sources

Hampton Tract, Judy Tract, Lake Wales, Peace River (North), Polk District Remainder in Polk County, Florida: Digital Terrain Model Derived From 2005 Aircraft Laser Elevation Measurements

CC ID: 1140326
Publish Date: 2006-08-24
Extent Type: Discrete
Extent Start Date/Time: 2006-08-24
Source Contribution:

Unknown | Source Geospatial Form: Model | Type of Source Media: Digital tape media

Process Steps

Process Step 1

CC ID: 1140327
Description:

HAMPTON TRACT, JUDY TRACT, LAKE WALES, PEACE RIVER (NORTH)

The LiDAR data was acquired using a Leica ALS50 from an altitude of 1,000-meters above ground level to provide an average ground

sample distance of 1-meter. The scanner field of view was 44-degrees, and the scan rate was 33-hertz. First and last return data

was collected along with the signal return intensity. 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 4 classifications:

1 = unclassified;

2 = ground;

9 = water; and

10 = photogrammetric mass points. The class 1 consists of all points not on the ground. Class 2 consists of bare earth points.

Class 9 consists of points within water polygons such as swamps and/or wetlands. Class 10 consists of supplementary mass points

that were photogrametrically compiled on points features such as as peaks or pits, and they were created to maintain the accuracy

of the DTM. Process Date: 20060125

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

Process Step 2

CC ID: 1140328
Description:

POLK REMAINDER

The LiDAR data was acquired using a Leica ALS50 from an average altitude of 3,000-feet above ground level to provide

an average ground sample distance of 3.3-feet. The scanner field of view was 44-degrees, and the scan rate was 33-hertz. First

and last return data collected along with the signal return intensity. 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 LiDAR data was reviewed in 3D using a digital

photogrammetric work station using ADS40 digital stereo imagery. The LiDAR ground points are adjusted, if needed, to fit the

ground. Breaklines were added to hydrologically enforce the DTM. The edited LiDAR data and the photogrammetrically compiled

breaklines are merged and processed to create the final DTM files. During the production process, LiDAR data gaps between the

flight lines were observed. These gaps between flight lines were corrected by adding photogrammetrically compiled mass points.

These points are classified as class 10, in the LAS file. In the areas with the compiled masspoints, it may be noted that the

masspoints are not as dense the areas with complete LiDAR coverage. The masspoints were compiled at a sufficient density to define

the surface to contract specifications. Anomalies were noted in the 2005 Peace River North and Hampton Tract LiDAR data, during

the LiDAR QA/QC process for the 2007 Remainder Polk County Project. The 2005 LiDAR datasets for Peace River North (P692) and

Hampton Tract (DO19) required additional processing to ensure correct ground points classification. In areas with gaps in the

LiDAR coverage, photogrammetrically compiled masspoints were added to the surface data. The LAS files contain 5 classifications:

1 = unclassified;

2 = ground;

9 = water;

10 = photogrammetric masspoints; and

11 = swamp and/or wetlands. The class 1 consists of all points not considered to be ground. Class 2 consists of bare earth (ground)

points. Class 9 consists of points within water polygons. Class 11 consists of point within swamps and/or wetlands. Class 10

consists of supplementary mass points that were photogrametrically compiled on points features such as peaks or pits, and LiDAR

data gaps. These points were created to maintain the accuracy of the DTM. 3D breaklines were collected at the digital photogrammetric

workstation during the LiDAR data review. These breaklines were delineated to insure the DTM is hydrologically correct.

Hydrologically Enforced Elevation Data is defined as "Hydro enforced TINS, DEMS, or contours ensure that top surfaces of bridges

and culverts are cut by stream breaklines so that computer models will accurately represent drainage flow" per FEMA's Appendix A

A.4.10. The breaklines were collected for hydrologically significant features as appropriate to support the development of the

generation of 2-foot contours meeting National Map Accuracy Standards. The following breakline features were classified and

separated: Closed Water Body Features, Linear Hydrographic Features, Coastal Shorelines, Road Features, Soft Features, Obscured

Vegetated Areas, Island Features, Overpasses, and Bridges. Per contract specifications, culverts were not collected as part of

this project. Therefore continuity of hydrographic features may not be consistent. For a complete description of survey methods,

processing methods, software, system parameters, and accuracy analysis, see the Florida MTS Report of Specific Purpose Survey,

SWFWMD MTS Report of DOI Survey, FY2007 Digital LiDAR (L672) (dated 4/8/2008)).

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

Process Step 3

CC ID: 1140329
Description:

The NOAA Office for Coastal Management (OCM) received 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 Geoid 03.

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

Process Date/Time: 2008-04-28 00:00:00

Catalog Details

Catalog Item ID: 50027
GUID: gov.noaa.nmfs.inport:50027
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