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Short Citation:
OCM Partners, 2022: 2008 Northwest Florida Water Management District (NWFWMD) Lidar: Eglin Air Force Base, Walton County, FL, https://www.fisheries.noaa.gov/inport/item/49876.

Item Identification

Title: 2008 Northwest Florida Water Management District (NWFWMD) Lidar: Eglin Air Force Base, Walton County, FL
Short Name: nwfwmd2008_walton_eglin_m574_metadata
Status: Completed
Publication Date: 2008-08
Abstract:

In the summer of 2008, the Northwest Florida Water Management District collected lidar data over a portion of Walton County, FL (Eglin Air force Base)

to support various projects such as floodplain and hazards mapping, wetlands mitigation and stormwater management. The data collection occured in a

portion of the county for which there is no prior collected lidar data. Used in conjunction with previously collected data in Walton County

(FDEM Lidar collected in 2006), these data support the creation of a county-wide, high resolution, lidar derived digital elevation model(DEM).

Original contact information:

Contact Name: John B. Crowe

Contact Org: Northwest Florida Water Management District

Title: Associate Hydrologist

Phone: (850) 539-5999

Email: John.Crowe@nwfwmd.state.fl.us

Purpose:

To supplement previously collected lidar data in the creation of county-wide, high resolution, lidar derived digital elevation models (DEM).

Notes:

10520

Supplemental Information:

Reflective surface data represents the DEM created by laser energy reflected from the first surface encountered by the laser pulse. Some energy

may continue beyond this initial surface to be reflected by a subsequent surface as represented by the Last Return data. Intensity information is

captured from the Reflective Surface pulse and indicates the relative energy returned to the sensor as compared to the energy transmitted. The

Intensity image is not calibrated or normalized but indicates differences in energy absorption due to the interaction of the surface materials

with laser energy at the wavelength transmitted by the sensor. Points are classified as water, bare ground or not bare ground to support

creation of a bare earth model from the data.

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/574/supplemental/2008_NWFWMD_Lidar_WaltonCounty_EglinAFB.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: Unknown
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.

Support Roles

Data Steward

CC ID: 681540
Date Effective From: 2008-08
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: 681542
Date Effective From: 2008-08
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: 681543
Date Effective From: 2008-08
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: 681541
Date Effective From: 2008-08
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: 1139256
W° Bound: -86.323522
E° Bound: -86.114148
N° Bound: 30.605467
S° Bound: 30.495943

Extent Group 1 / Time Frame 1

CC ID: 1139255
Time Frame Type: Discrete
Start: 2008-06-15

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: 741840
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=574
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: 741841
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/574/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741843
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741844
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 681559
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 681558
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: 718456
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741842
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; ESRI ArcCatalog 9.2.4.1420

Data Quality

Horizontal Positional Accuracy:

Contracted to meet 1 meter (RMSE) horzontal accuracy

Vertical Positional Accuracy:

LiDAR data accuracy determination shall employ the National Standard for Spatial Data Accuracy (NSSDA).

Contracted to meet 15cm (RMSE) on open bare terrain if errors are normally distributed.

Completeness Report:

A visual qualitative assessment was performed in the source lidar dataset.

Conceptual Consistency:

Data covers the tile scheme provided for the Eglin Airforce Base and partially covers the tiling scheme provided for the county.

Lineage

Sources

LiDAR

CC ID: 1139249
Publish Date: 2009-01-01
Extent Type: Discrete
Extent Start Date/Time: 2006-07
Source Contribution:

unknown | Source Geospatial Form: vector digital data | Type of Source Media: Unknown

Process Steps

Process Step 1

CC ID: 1139250
Description:

The ABGPS, IMU, and raw Optech 3100 LiDAR data are integrated into the TerraScan post processor software. The resultant file is in a LAS binary

file format. The LAS file version 1.1 formats can be easily transferred from one file format to another. It is a binary file format that

maintains information specific to the LiDAR data (return#, intensity value, xyz, etc.). The resultant points are produced in the geodetic

coordinates referenced to the NAD83 horizontal datum and GRS80 vertical datum. The date and time for each flight line can be determined using

the Julian date and time. The Julian date is a continuous count of days and fractions since noon Universal Time on January 1, 4713 BCE on the

Julian calendar.

Process Date/Time: 2008-06-15 00:00:00

Process Step 2

CC ID: 1139251
Description:

The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary

filters are applied as appropriate for the production of bare earth digital terrain models (dtms). Interactive editing methods are applied to

those areas where it is inappropriate or impossible to use the feature extraction filters, based upon the design criteria and/or limitations of

the relevant filters. These same feature extraction filters are used to produce elevation height surfaces. The LiDAR mass points were delivered

in American Society for Photogrammetry and Remote Sensing LAS 1.1 format. The header file for each dataset is complete as define by the LAS 1.1

specification. In addition the following fields are included: Flight Date Julian, Year, and Class. The LAS files do not include overlap. The

data was classified as follows:

Class 1 = Unclassified. This class includes vegetation, buildings, noise etc.

Class 2 = Ground Class

9 = Water

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

Process Step 3

CC ID: 1139252
Description:

Conversion from Geodetic coordinates, NAD83 into State Plane coordinates (meters) and conversion from ellipsoid heights (meters) into

orthometric heights (U.S. Survey Feet).

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

Process Step 4

CC ID: 1139253
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 State Plane Florida West coordinates to geographic (NAD83) coordinates.;

2. the data were filtered to remove elevation outliers.;

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

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

Process Date/Time: 2011-03-31 00:00:00

Catalog Details

Catalog Item ID: 49876
GUID: gov.noaa.nmfs.inport:49876
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