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Short Citation:
OCM Partners, 2022: 2005 Southwest Florida Water Management District (SWFWMD) LiDAR: Weeki Wachee, https://www.fisheries.noaa.gov/inport/item/49687.

Item Identification

Title: 2005 Southwest Florida Water Management District (SWFWMD) LiDAR: Weeki Wachee
Short Name: fl2005_swfwmd_weekiwachee_m2545_metadata
Status: Completed
Publication Date: 2014-01-03
Abstract:

This data set is one component of a digital terrain model (DTM) for Weeki Wachee, Hernando County,

Florida encompassing approximately 13.5 square miles. This dataset is comprised of 15 LiDAR files,

based on the DISTRICT 5,000' by 5,000' sheet index system, in the LAS file format. The raw data was

collected on 1 March 2005 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.

Original contact information:

Contact Name: Diana Burdick

Contact Org: Southwest Florida Water Management District

Title: GIS Analyst

Phone: 352-540-6018

Email: Diana.Burdick@swfwmd.state.fl.us

Purpose:

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

planning, engineering, and habitat restoration projects

Notes:

10331

Supplemental Information:

A footprint of this data set may be viewed in Google Earth at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2545/supplemental/fl2005_swfwmd_weekiwachee.kmz

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 from the analysis of this information are not the responsibility

of Kucera International, ARC, USGS, NOAA, the Office for Coastal Management or its partners.

Data Set Credit: Acknowledgement of the Southwest Florida Water Management District would be appreciated in products derived from these data.

Support Roles

Data Steward

CC ID: 672596
Date Effective From: 2014-01-03
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: 672598
Date Effective From: 2014-01-03
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: 672599
Date Effective From: 2014-01-03
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: 672597
Date Effective From: 2014-01-03
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: 1134408
W° Bound: -82.657775
E° Bound: -82.564208
N° Bound: 28.555114
S° Bound: 28.513488

Extent Group 1 / Time Frame 1

CC ID: 1134407
Time Frame Type: Discrete
Start: 2005-03-01

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/#/lidar/search/where:ID=2545

The data set is dynamically generated based on user-specified parameters.

;

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. DTM accuracy specifications are valid only within the Hernando County limits. The user is cautioned that any DTM data

falling outside of the Hernando County limits may not meet the accuracy specifications.

Distribution Information

Distribution 1

CC ID: 740749
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2545
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: 740750
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2545/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740752
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740753
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 740754
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2545/supplemental/fl2005_swfwmd_weekiwachee.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the SWFWMD Topography Survey of Weeki Wachee in Florida.

Activity Log

Activity Log 1

CC ID: 672615
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 672614
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: 718236
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740751
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

Features detected in the elevation map are consistent with features on digital orthophotographs that meet National Map Accuracy Standards at a scale of 1:1200. The horizontal and vertical accuracy requirements of this project were: 3.8-feet (95% confidence level) horizontal and 0.59-feet (95% confidence level) vertical. Tested 1.1 m (3.6-feet) horizontal accuracy at the 95% confidence level.; Quantitative Value: 1.09 meters, Test that produced the value:

Tested 1.09 horizontal accuracy at the 95% confidence level. Horizontal accuracy was

tested by comparison of photo identifiable field survey ground truth QC test points (6 points total) against the corresponding

position with the digital orthophoto imagery. One hundred percent (100%) met the NMAS accuracy criteria for 1:1200 mapping.

Vertical Positional Accuracy:

Unobscured and obscured points were tested by field survey QC test points.

Thirty (30) total points were captured randomly across the project extents. The horizontal and vertical

accuracy requirements of this project were: 3.8-feet (95% confidence level) horizontal and 0.1798 (95%

confidence level) vertical.

; Quantitative Value: 0.1189 meters, Test that produced the value:

Vertical accuracy was tested by elevation comparison of field survey ground

truth QC test points (30 points total) against the corresponding position within the TIN derived from the DTM. One

point (1) did not meet the 95th percentile criteria.

Completeness Report:

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

this dataset. This map data is not complete without a signed and sealed Minimum Technical Standards Report of

Specific Purpose Survey: Weeki Wachee LiDAR Project, Hernando County, Florida dated January 6, 2006. Refer to

this document for use constraints.

Conceptual Consistency:

Unobscured and obscured points were tested by field survey QC test points. Thirty (30)

total points were captured randomly across the project extents. The horizontal and vertical accuracy requirements

of this project were: 3.8-feet (95% confidence level) horizontal and 0.59-feet (95% confidence level) vertical.

Lineage

Sources

Weeki Wachee Florida: Digital Terrain Model Derived From 2005 Aircraft Laser Elevation Measurements

CC ID: 1134403
Publish Date: 2006-01-06
Extent Type: Discrete
Extent Start Date/Time: 2005-02-28
Source Contribution:

LIDAR points form the basis of the DTM Surface | Source Geospatial Form: model | Type of Source Media: HDD

Process Steps

Process Step 1

CC ID: 1134404
Description:

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 3 consists of points within water polygons such as

swamps and/or wetlands. Class 4 consists of supplementary mass points that were

photogrammetrically compiled on points features such as peaks or pits, and they were created

to maintain the accuracy of the DTM.

Process Date/Time: 2005-09-07 00:00:00

Process Step 2

CC ID: 1134405
Description:

The NOAA Office for Coastal Management (OCM) received the files in las format. The files contained lidar elevation and intensity

measurements. The data were in FL State Plane West coordinates and NAVD88 (orthometric) heights in feet. OCM performed the

following processing for data storage and Digital Coast provisioning purposes:

1. The data were converted from FL State Plane west coordinates to geographic coordinates.

2. The data were converted from NAVD88 (orthometric) heights in feet to GRS80 (ellipsoid) heights in meters using Geoid 03.

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

Process Date/Time: 2014-01-03 00:00:00

Catalog Details

Catalog Item ID: 49687
GUID: gov.noaa.nmfs.inport:49687
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:21+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