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Short Citation:
OCM Partners, 2022: 2007 Lake County Board of County Commissioners Topographic LiDAR: Lake County, Florida, https://www.fisheries.noaa.gov/inport/item/49603.

Item Identification

Title: 2007 Lake County Board of County Commissioners Topographic LiDAR: Lake County, Florida
Short Name: 2007_lakecounty_florida_m1431_metadata
Status: Completed
Publication Date: 2013-01
Abstract:

This metadata document describes the LiDAR point data in LAS format produced by Kucera covering the project area of Lake County, FL. The data produced is satisfactory for the generation of both 1' and 2' contours. The average point

spacing for all tiles is estimated to be 1 meter.

Original contact information:

Contact Name: Kevin Willis

Contact Org: Lake County Board of County Commissioners, Department of Information Technology, GIS Division

Title: Interim GIS Director

Phone: 352-343-9791

Email: kwillis@lakecountyfl.gov

Purpose:

LiDAR points depict the 'bald earth' within the project area. All points not specifically derived from the terrain are removed (tree canopy, buildings, etc.). As such, the file is useful for a variety of applications,

such as aiding in contour generation and the production of orthophotos.

Notes:

10247

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/geoid18/1431/supplemental/2007_LakeCounty_Florida.kmz

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation

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
Data Presentation Form: las
Entity Attribute Overview:

LiDAR points in LAS 1.2 format

Entity Attribute Detail Citation:

none

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility

of Woolpert, USGS, the Office for Coastal Management or its partners.

Support Roles

Data Steward

CC ID: 669508
Date Effective From: 2013-01
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: 669510
Date Effective From: 2013-01
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: 669511
Date Effective From: 2013-01
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: 669509
Date Effective From: 2013-01
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: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 1133388
W° Bound: -81.96434
E° Bound: -81.347519
N° Bound: 29.283727
S° Bound: 28.332972

Extent Group 1 / Time Frame 1

CC ID: 1133387
Time Frame Type: Discrete
Start: 2007-04-05

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:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1431

;

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. These data

depict the heights at the time of the survey and are only accurate for that time.

Distribution Information

Distribution 1

CC ID: 740278
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1431
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: 740279
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1431/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740281
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740282
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 740283
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1431/supplemental/2007_LakeCounty_Florida.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for Lake County, Florida.

Activity Log

Activity Log 1

CC ID: 669524
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 669523
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: 718026
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740280
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

The attribute accuracy is tested in the LiDAR processing stage. After classification of the LiDAR data, the 'bald earth' point class is compared to ground control collected within the project area.

Horizontal Positional Accuracy:

Horizontal positional accuracy for LiDAR is dependent upon the quality of the GPS/INS solution, sensor calibration and ground conditions at the time of data capture. Standard horizontal accuracy for LiDAR at

this mapping scale is 1 meter (3.28').

; Quantitative Value: 1.0 meters, Test that produced the value: This value (in meters) is computed by comparing controls to an intensity based image derived from the classified LiDAR data and represents the RMSE of residuals on controls within the project area.

Vertical Positional Accuracy:

Horizontal positional accuracy for LiDAR is dependent upon the quality of the GPS/INS solution, sensor calibration and ground conditions at the time of data capture.

The vertical accuracy was tested with a result of a RMSE 0.062m (0.205').

; Quantitative Value: 0.062 meters, Test that produced the value: This value (in meters) is computed by comparing controls to the classified LiDAR ground surface and represents the RMSE of residuals on controls within the project area.

Completeness Report:

LiDAR data is collected within the project area, processed and verified against control. The bare earth surface will contain voids where insufficient energy was reflected from the surface to generate a valid return from the terrain.

Conceptual Consistency:

Data was filtered using automated procedures followed by a manual review of the completed data set.

Lineage

Process Steps

Process Step 1

CC ID: 1133381
Description:

At selected locations throughout the site, accurate GPS coordinates and elevations are surveyed and the points are marked with targets.

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

Process Step 2

CC ID: 1133382
Description:

New LiDAR data is captured for the project area using a Leica ALS50 LiDAR instrument in conjunction with a POSAV Applanix GPS/INS system mounted within a Piper Navajo twin prop airplane.

Base-station receivers are operated on the ground over known site points during the flyover to provide data necessary to reference the instrument position and orientation measurements to the terrain coordinate system. Altitude of flight was 6315' above mean sea level (AMSL).

Process Date/Time: 2007-04-05 00:00:00

Process Step 3

CC ID: 1133383
Description:

The airborne GPS/INS data is processed, in both forward and reverse directions, together with the simultaneously recorded ground-based GPS base station data to determine the LiDAR sensor's angle and orientation in

the terrain (project) coordinate datum during the survey.

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

Process Step 4

CC ID: 1133384
Description:

LiDAR data is processed using the GPS/INS solution. Data is classified to produce a 'bald earth' surface and output to a LAS binary file format.

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

Process Step 5

CC ID: 1133385
Description:

The NOAA Office for Coastal Management (OCM) received topographic files in LAS format. The files contained lidar

elevation and intensity measurements. The data were received in Florida State Plane East (Zone 0901) Coordinates

and were vertically referenced to NAVD88 using the Geoid03 model. The vertical units of the data were

survey feet. OCM performed the following processing for data storage and Digital Coast provisioning purposes:

1. The topographic las files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid03.

2. The topographic las files were converted from Florida State Plane East (survey feet) to Geographic coordinates (decimal degrees).

Process Date/Time: 2013-01-01 00:00:00

Catalog Details

Catalog Item ID: 49603
GUID: gov.noaa.nmfs.inport:49603
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