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Short Citation:
OCM Partners, 2022: 2007 Northwest Florida Water Manangement District(NWFWMD) Lidar: Gadsden County, https://www.fisheries.noaa.gov/inport/item/49872.

Item Identification

Title: 2007 Northwest Florida Water Manangement District(NWFWMD) Lidar: Gadsden County
Short Name: nwfwmd2007_gadsden_m583_metadata
Status: Completed
Publication Date: 2007-09-08
Abstract:

LIDAR-derived binary (.las) files containing points classified as bare-earth and canopy (first return) were produced for the 2007 Northwest Florida

Water Management District - Gadsden County, Florida lidar mapping project. The files were provided in a scheme of FDEM-derived 5,000 x 5,000 foot

(1500 x 1500 meter) tiles. Horizontal mapping units are in UTM meters, vertical mapping units are in U.S. survey feet. The total mapping area

covers 535 square miles of Gadsden County, Florida.

Original contact information:

Contact Name: Mr. John Crowe

Contact Org: Northwest Florida Water Management District

Title: Director, Division of Resource Management

Phone: 850-539-5999

Email: john.crowe@nwfwmd.state.fl.us

Purpose:

The purpose of the project is to produce accurate, high-resolution data for planning, analysis, and for use with other data sets. Merrick &

Company obtained LiDAR data over approximately 535 square miles covering the majority of Gadsden County, Florida. The LiDAR data has been processed

to result in a data set that is suitable for the future generation of 2-foot contours.

These data will be used to support FEMA's Map Modernization Program through the creation of high-resolution digital elevation models (DEMs). These

DEMs support a variety of applications, including improved floodplain delineation, hydrologic and hydraulic modeling, hazard mapping as well as

other planning activities.

Notes:

10516

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/geoid18/583/supplemental/2007_NWFWMD_Gadsden_County_Lidar.kmz

The Lidar Mapping Report (including sensor information, collection parameters, etc.) for this data set may be viewed at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/583/supplemental/NWFWMD_Gadsden_County_Lidar_Mapping_Report.pdf

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None bare earth
None binary
None canopy

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 data
Entity Attribute Overview:

Lidar points are attributed with the following classifications:

1 - canopy

2 - ground (bare earth)

9 - water

Lidar intensity values range from 0-255. Lidar return values range from 1-3. Flight line numbers range from 1-19.

Entity Attribute Detail Citation:

All deliverables meet specifications in contract. LAS Files meet ASPRS Classification Standards.

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of NOAA, the Office for Coastal Management

or its partners.

Data Set Credit: Merrick & Company

Support Roles

Data Steward

CC ID: 681391
Date Effective From: 2007-09-08
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: 681393
Date Effective From: 2007-09-08
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: 681394
Date Effective From: 2007-09-08
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: 681392
Date Effective From: 2007-09-08
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: 1139359
W° Bound: -84.908454
E° Bound: -84.30435
N° Bound: 30.718384
S° Bound: 30.374728

Extent Group 1 / Time Frame 1

CC ID: 1139358
Time Frame Type: Range
Start: 2007-09-08
End: 2007-09-24

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

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.

Distribution Information

Distribution 1

CC ID: 741820
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=583
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: 741821
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/583/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741823
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741824
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 681414
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 681413
Activity Date/Time: 2017-11-14
Description:

Converted from FGDC Content Standard 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: 718452
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741822
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

Microsoft Windows XP version 5.1 (Build 2600, Service Pack 2); ArcGIS Desktop 9.1; ArcGIS Workstation 9.1; MARS 4.0

Data Quality

Accuracy:

Verification of attribute accuracy of LIDAR data involves the use of filtering techniques. Auto-filtering uses algorithms to reclassify data in

the point cloud. Hand-filtering involves the use of a technician working in a graphic environment to reclassify the erroneous points that may

remain in the LIDAR point cloud after auto filter.

Horizontal Positional Accuracy:

Horizontal accuracy is verified in three tests. During boresighting, adjoining flightlines are view in profile and hard edged features are

observed and if necessary the flightlines are adjusted for good relative horizontal and vertical fit. The second test for horizontal accuracy

is by comparing raw contours from each flightline against adjoining flightlines at specific points. The final test is the vertical LIDAR control

report.

Vertical Positional Accuracy:

Survey control points were used to validate the accuracy of the LIDAR surface model after automatic and hand filtering. This surface exceeds the

NSSDA consolidated vertical accuracy specifications of 36.3 cm (1.19ft) at the 95% confidence level.

; Quantitative Value: 0.078 meters, Test that produced the value: RMSEz (m) based upon comparison with 45 survey checkpoints.

Completeness Report:

This dataset contains classified returns of the LIDAR sensor. The sensor data was verified in MARS software to ensure complete

coverage.

Conceptual Consistency:

Calibrations of the LIDAR flightline data are performed; this process is known as boresighting. The flightlines are compared to evaluate both their

relative and absolute accuracies.

Lineage

Sources

Ground Control

CC ID: 1139353
Publish Date: 2007-10-01
Extent Type: Discrete
Extent Start Date/Time: 2007-10-01
Source Contribution:

GPS control network for LIDAR acquisition and processing. | Source Geospatial Form: spreadsheet | Type of Source Media: spreadsheet

LIDAR

CC ID: 1139354
Publish Date: 2007-03-17
Extent Type: Range
Extent Start Date/Time: 2007-09-08
Extent End Date/Time: 2007-09-24
Source Contribution:

LIDAR points form the basis of the DTM surface. | Source Geospatial Form: point digital data | Type of Source Media: digital data

Process Steps

Process Step 1

CC ID: 1139355
Description:

LIDAR data was collected using Merrick's ALS50 Phase 2 sensor. The raw data was verified in MARS software for complete coverage of the project

area, and boresighted to align the flightlines. Raw data files were parsed into manageable client-specific tiles. These tiles were then processed

through automated filtering that separates the data into different classification groups: error points, ground points, and canopy/building points.

The data was next taken into a graphic environment to reclassify the erroneous points that may remain in the LIDAR point cloud after auto filter.

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

Process Step 2

CC ID: 1139356
Description:

The NOAA Office for Coastal Management (OCM) received files in LAS format. The files contained LiDAR intensity and elevation measurements.

OCM performed the following processing on the data for data storage purposes and Digital Coast provisioning:

1. The data were converted from projected UTM (NAD83, Zone 16) coordinates to geographic (NAD83) coordinates

2. The data were converted from NAVD88 heights to ellipsoid heights using Geoid03

3. The LAS header fields were sorted by latitude and updated

Process Date/Time: 2011-05-05 00:00:00
Source: LIDAR

Catalog Details

Catalog Item ID: 49872
GUID: gov.noaa.nmfs.inport:49872
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:22+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