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Short Citation:
OCM Partners, 2022: 2007 Florida Division of Emergency Management (FDEM) Lidar Project: Wakulla County, https://www.fisheries.noaa.gov/inport/item/49679.

Item Identification

Title: 2007 Florida Division of Emergency Management (FDEM) Lidar Project: Wakulla County
Short Name: fdem2007_wakulla_m552_metadata
Status: Completed
Publication Date: 2008
Abstract:

This report pertains to a Specific Purpose Lidar Survey of Wakulla County, Florida, conducted in the summer of 2007 for the Florida Division of

Emergency Management (FDEM).

The Lidar dataset was prepared by the Program and Data Solutions (PDS) team under FDEM contract 07-HS-34-14-00-22-469, Task Order 20070525-492718a

(PDS Task Order B). The Lidar dataset of Wakulla County was acquired by Terrapoint USA in the summer of 2007. The Lidar dataset was delivered as a

point cloud in LAS 1.1 format.

Original contact information:

Contact Org: Florida DEM

Phone: 850-413-9907

Email: gis@dca.state.fl.us

Purpose:

The Lidar dataset is used in conjunction with breaklines to determine a DTM surface. These data support the Florida Division of Emergency Management's

(FDEM) development and maintenance of Regional Evacuation Studies, which include vulnerability assessments and assist disaster response personnel

in understanding threats to Florida's citizens and visitors.

Notes:

10323

Supplemental Information:

The Lidar QA/QC Quantitative and Qualitative Assessment Report for this data set may be viewed at:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12a/552/supplemental/lidarqaqcreport_wakulla_final.pdf

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12a/552/supplemental/2007_FDEM_Lidar_Wakulla_County.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: Map (digital)
Distribution Liability:

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

or its partners.

Support Roles

Data Steward

CC ID: 672320
Date Effective From: 2008
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: 672322
Date Effective From: 2008
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: 672323
Date Effective From: 2008
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: 672321
Date Effective From: 2008
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: 1138911
W° Bound: -84.748705
E° Bound: -84.083405
N° Bound: 30.306085
S° Bound: 29.962285

Extent Group 1 / Time Frame 1

CC ID: 1138910
Time Frame Type: Range
Start: 2007-07-05
End: 2008-05-04

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
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: 740706
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=552
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: 740707
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12a/552/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740709
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740710
URL: https://coast.noaa.gov
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 672336
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 672335
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: 718227
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740708
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 9.2.5.1450

Data Quality

Horizontal Positional Accuracy:

Lidar source compiled to meet 1m horizontal accuracy.

; Quantitative Value: 1 meters, Test that produced the value:

The PDS team does not perform independent horizontal accuracy testing on the Lidar. Lidar vendors perform calibrations on the Lidar sensor and

compare data to adjoining flight lines to ensure Lidar meets the 1 meter horizontal accuracy standard at the 95% confidence level.

Vertical Positional Accuracy:

The Lidar is required to meet 18.2 cm (0.60 ft) Fundamental Vertical Accuracy (FVA) and 36.3 cm (1.19 ft) Consolidated Vertical Accuracy (CVA).

; Quantitative Value: 0.168 meters, Test that produced the value:

Based on the vertical accuracy testing conducted by PDS, using NSSDA and FEMA guidelines, vertical accuracy at the 95% confidence level

(called Accuracyz) is computed by the formula RMSEz x 1.9600. The dataset for Wakulla County, Florida satisfies the criteria:

Countywide Lidar dataset tested 16.8 cm (0.55 ft) vertical accuracy at 95% confidence level in open terrain, based on open terrain

RMSEz (8.5 cm (0.28 ft)) x 1.9600. Countywide Lidar dataset tested 0.20 cm (.64 ft) vertical accuracy at 95% confidence level in all land cover categories

combined, based on consolidated RMSEz (10.1 cm (.33 ft)) x 1.9600.

Completeness Report:

A visual qualitative assessment was performed to ensure the data completeness against the intensity images derived from Lidar points.

No void or missing data.

Conceptual Consistency:

Data covers the tile scheme provided for the county.

Lineage

Sources

Lidar

CC ID: 1138905
Publish Date: 2007-01-01
Extent Type: Range
Extent Start Date/Time: 2007-05-04
Extent End Date/Time: 2007-08-16
Source Contribution:

Lidar dataset was used to create intensity stereopairs for 3D breakline compilation and for contour generation. | Source Geospatial Form: vector digital data | Type of Source Media: online

Process Steps

Process Step 1

CC ID: 1138906
Description:

The ABGPS, IMU, and raw Optech 3100ea Lidar scans are integrated using Optech Incorporated's DASHMap, version 1.1 software, Terrascan software

and Microstation software. The resultant file is in a LAS binary file format . The LAS file version 1.1 format 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 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: 2008-01-01 00:00:00

Process Step 2

CC ID: 1138907
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 (Precision reported in brackets): Class (Integer); GPS Week Time (0.0001 seconds);

Easting (0.01 meter); Northing (0.01 meter); Elevation (0.01 meter); Echo Number (Integer 1 to 4); Echo (Integer 1 to 4); Intensity (8 Bit Integer);

Flightline (Integer); Scan Angle (Integer Degree). 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 7= Noise

Class 9 = Water

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

Process Step 3

CC ID: 1138908
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 projected in Florida State Plane Coordinates (North Zone, NAD83/HARN), and referenced to the orthometric datum of NAVD88 utilizing

Geoid 03. OCM performed the following processing to the data to make it available within the Digital Coast:

1. The data were converted from State Plane Coordinates (NAD83/HARN) coordinates to geographic coordinates (NAD83).

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: 2010-12-07 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity LAS

Catalog Details

Catalog Item ID: 49679
GUID: gov.noaa.nmfs.inport:49679
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