Short Citation:
Office for Coastal Management, 2021: 2011 Georgia Department of Natural Resources (GADNR) Environmental Protection Division (EPD) Lidar: Four Counties (Burke, Columbia, Lincoln, and Richmond), https://www.fisheries.noaa.gov/inport/item/48181.

Item Identification

Title: 2011 Georgia Department of Natural Resources (GADNR) Environmental Protection Division (EPD) Lidar: Four Counties (Burke, Columbia, Lincoln, and Richmond)
Short Name: ga2011_fourcounty_m1389_metadata
Status: Completed
Publication Date: 2012-09
Abstract:

This data set is the topographic elevation point data derived from multiple return light detection and ranging (LiDAR) measurements for four

counties in Georgia. These counties are: Burke, Columbia, Lincoln, and Richmond. The Statement of Work (SOW) was developed

by the National Oceanic and Atmospheric Administration's (NOAA) Office for Coastal Management (referred to as the Center) in partnership

with the Georgia Department of Natural Resources (GADNR) Environmental Protection Division (EPD).

LiDAR data is a remotely sensed high resolution elevation data collected by an airborne platform. The LiDAR sensor uses a combination of

laser range finding, GPS positioning, and inertial measurement technologies. The LiDAR systems collect data point clouds that are used to

produce highly detailed Digital Elevation Models (DEMs) of the earth's terrain, man-made structures, and vegetation. The LiDAR data acquisition

and processing for Burke, Lincoln, and Richmond County was performed in the Winter of 2011. The LiDAR data was provided to NOAA OCM,

as part of the 4 GA Counties of Elevation Data task order. The 4 GA Counties of Elevation Data task order AOI encompassed approximately

1,739 square miles. The area of interest acquired and processed for Burke, Lincoln, and Richmond County is approximately 1,386 square miles.

The task order required the LiDAR data to be collected at a nominal pulse spacing (NPS) of 1.0 meter. The LiDAR data was collected to

meet Fundamental Vertical Accuracy (FVA) Root Mean Square Error (RMSE) of 18.0 cm or better at a 95% confidence level, so that when

combined with breaklines, the data adequately supports the generation of two (2) foot FEMA compliant contours. The final LiDAR data

was delivered in 5,000' x 5,000' tiles using North American Datum 1983, Georgia State Plane Coordinate System, East Zone, and expressed

in US Survey Feet. For data storage and Digital Coast provisioning purposes, the NOAA OCM converted the data to geographic coordinates

and ellipsoid heights in meters. Special Note: Temporal changes of water levels will be observed in any data from Richmond and Lincoln

counties overlapping any previously delivered data from Columbia County.

The final products include full classified LAS, hydrologically flattened four (4) foot pixel raster DEM's of the bare earth surface in

ESRI Floating Point Grid Format (ArcGRID DEMs), and hydrologically flattened breaklines.

The data were collected on the following dates:

Burke and Richmond Counties: December 13, 14, 17, 2011

Columbia County February 26, 2011

Lincoln County December 18, 2011

The data contains las points with the following classifications:

Class 0 No Classification

Class 2 Ground

Class 7 Low Point (Noise)

Class 9 Water

Class 10 Land below sea level

Class 12 Overlap

Original contact information:

Contact Org: NOAA Office for Coastal Management

Phone: 843-740-1202

Email: coastal.info@noaa.gov

Purpose:

The purpose of this data is for use in coastal management decision making, including applications such as flood mapping, hydrologic modeling,

risk map analysis, and water rights management.

Notes:

10204

Supplemental Information:

The Lidar Report for this data set may be viewed at:

https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/1389/supplemental/4GACountiesofElevation_NOAA_Final_Report_Jun2012.pdf

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

https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/1389/supplemental/2011_GADNR_Burke_Columbia_Lincoln_Richmond_Counties_Lidar.kmz

Keywords

Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords Earth Science > Land Surface > Topography > Terrain Elevation > Topographical Relief Maps
Global Change Master Directory (GCMD) Science Keywords Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
Global Change Master Directory (GCMD) Science Keywords Earth Science > Oceans > Coastal Processes > Coastal Elevation
ISO 19115 Topic Category elevation
None Bathymetry/Topography
None Breaklines
None DEM
None Elevation
None LiDAR
None Model
None Raster
None Remote Sensing

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords Continent > North America > United States Of America > Georgia
None Burke County
None Columbia County
None Georgia
None Lincoln County
None Richmond County
None United States

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 the GADNR, the Office for Coastal Management

or its partners.

Support Roles

Data Steward

CC ID: 623834
Date Effective From: 2012-09
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: 623836
Date Effective From: 2012-09
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: 623837
Date Effective From: 2012-09
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: 623835
Date Effective From: 2012-09
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: 623844
W° Bound: -82.641278
E° Bound: -81.540949
N° Bound: 33.982767
S° Bound: 32.797092

Extent Group 1 / Time Frame 1

CC ID: 623839
Time Frame Type: Discrete
Start: 2011-12-13

Extent Group 1 / Time Frame 2

CC ID: 623840
Time Frame Type: Discrete
Start: 2011-12-14

Extent Group 1 / Time Frame 3

CC ID: 623841
Time Frame Type: Discrete
Start: 2011-12-17

Extent Group 1 / Time Frame 4

CC ID: 623842
Time Frame Type: Discrete
Start: 2011-12-18

Extent Group 1 / Time Frame 5

CC ID: 623843
Time Frame Type: Discrete
Start: 2011-02-26

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Security Classification System:

Unclassified

Security Handling Description:

Unclassified

Data Access Procedure:

This data can be obtained on-line at the following URL:

https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1389

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

;

Data Access Constraints:

None

Data Use Constraints:

None, however, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of the data

may no longer represent actual surface conditions. Users should not use the data for critical applications without a full awareness of its limitations.

Distribution Information

Distribution 1

CC ID: 743826
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1389
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: 743827
Download URL: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/1389
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 743829
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 743830
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 743831
URL: https://coast.noaa.gov/htdata/lidar1_z/geoid12a/data/1389/supplemental/2011_GADNR_Burke_Columbia_Lincoln_Richmond_Counties_Lidar.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the four Georgia counties in this data set.

Activity Log

Activity Log 1

CC ID: 623865
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 623864
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: 717857
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743828
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 3; TerraSolid LTD: Terrascan Version 010.018

Data Quality

Accuracy:

The LiDAR collected for this task order was collected to meet a Fundamental Vertical Accuracy (FVA) of NSSDA RMSEZ = 18 cm

(NSSDA AccuracyZ 95% = 36cm) or better; assessment procedures to comply with FEMA guidelines.

| Quantitative Value: 18 cm RMSE | Quantitative Test Explanation: Points measured will produce an error less than 18.0 cm RMSE.

Horizontal Positional Accuracy:

Horizontal accuracy is plus or minus 4 ft (1.21 m) at the 95% confidence level using RMSE(r) x 1.9600 as defined by the FGDC Geospatial Positional

Accuracy Standards, Part 3: NSSDA.

; Quantitative Value: 1.21 meters, Test that produced the value: LiDAR system calibration is available in the project report.

Vertical Positional Accuracy:

The data collected under this Task Order meets the National Standard for Spatial Database Accuracy (NSSDA) accuracy standards.

The NSSDA standards specify that vertical accuracy be reported at the 95 percent confidence level for data tested by an independent

source of higher accuracy. (http://www.fgdc.gov/standards/projects/FGDC-standards-projects/accuracy/part3/index_html).

For Burke, Richmond, and Lincoln Counties, the Fundamental Vertical Accuracy (FVA) tested 6 cm (0.197 ft) RMSE at 95% confidence level.

For Columbia County, the Fundamental Vertical Accuracy (FVA) tested 5.4 cm (0.179 ft) RMSE at 95% confidence level.

Completeness Measure:

Cloud Cover: 0

Completeness Report:

The LiDAR data is visually inspected for completeness to ensure that are no gaps between flight lines.

Conceptual Consistency:

All formatted data are validated using commercial GIS software to ensure proper formatting and loading prior to delivery.

Lineage

Sources

4 GA Counties of Elevation Data

CC ID: 623819
Contact Name: Woolpert, Inc.
Publish Date: 2011-02-10
Extent Type: Discrete
Extent Start Date/Time: 2011-12-13
Source Contribution:

The LiDAR data collected for this task order. | Source Geospatial Form: vector digital data | Type of Source Media: disc

Process Steps

Process Step 1

CC ID: 623820
Description:

Using a Leica LiDAR system, 100 flight lines of high density data, at a nominal pulse spacing (NPS) of 1.0 meter, were collected over

Burke, Lincoln and Richmond Counties, GA (approximately 1,386 square miles). Multiple returns were recorded for each laser pulse along

with an intensity value for each return. A total of six (6) missions were flown on December 13, 14, 17, and 18 in 2011. The geoid used

to reduce satellite derived elevations to orthometric heights was Geoid09. The horizontal datum used for this survey is North American

Datum 1983, Georgia State Plane Coordinate System, East Zone, and expressed in US Survey Feet. The vertical datum used for this survey

is North American Vertical Datum 1988 (NAVD88), and expressed in US Survey Feet. Airborne GPS data was differentially processed and

integrated with the post processed IMU data to derive a smoothed best estimate of trajectory (SBET). The SBET was used to reduce the

LiDAR slant range measurements to a raw reflective surface for each flight line.

System Parameters:

Type of Scanner = Leica

Data Acquisition Height = 6,500-feet AGL

Scanner Field of View = 40 degrees

The Scan Frequency = 41.8 Hertz

Pulse Repetition Rate - 115.6 Kilohertz

Aircraft Speed = 130 Knots

Swath Width = 4,732-feet

Number of Returns Per Pulse = Maximum of 4

Distance Between Flight Lines = 3,289-feet

Process Date/Time: 2011-12-13 00:00:00

Process Step 2

CC ID: 623821
Description:

The Leica ALS50/60 LiDAR systems calibration and performance is verified on a periodic basis using Woolpert's calibration range. The

calibration range consists of a large building and runway. The edges of the building and control points along the runway have been

located using conventional survey methods. Inertial measurement unit (IMU) misalignment angles and horizontal accuracy are calculated

by comparing the position of the building edges between opposing flight lines. The scanner scale factor and vertical accuracy is

calculated through comparison of LiDAR data against control points along the runway. Field calibration is performed on all flight lines

to refine the IMU misalignment angles. IMU misalignment angles are calculated from the relative displacement of features within the

overlap region of adjacent (and opposing) flight lines. The raw LiDAR data is reduced using the refined misalignment angles.

Process Date/Time: 2011-12-13 00:00:00

Process Step 3

CC ID: 623822
Description:

Once the data acquisition and GPS processing phases are complete, the LiDAR data was processed immediately to verify the coverage had

no voids. The GPS and IMU data was post processed using differential and Kalman filter algorithms to derive a best estimate of

trajectory. The quality of the solution was verified to be consistent with the accuracy requirements of the task order.

Process Date/Time: 2011-12-18 00:00:00

Process Step 4

CC ID: 623823
Description:

The individual flight lines were inspected to ensure the systematic and residual errors have been identified and removed. Then, the

flight lines were compared to adjacent flight lines for any mismatches to obtain a homogenous coverage throughout the project area.

The point cloud underwent a classification process to determine bare-earth points and non-ground points utilizing "first and only"

as well as "last of many" LiDAR returns. This process determined bare-earth points (Class 2), noise (Class 7), water (Class 9)

ignored ground (Class 10), unclassified data (Class 1), and overlap points (Class 12). The bare-earth (Class 2 - Ground)

LiDAR points underwent a manual QA/QC step to verify that artifacts have been removed from the bare-earth surface. The surveyed ground

control points are used to perform the accuracy checks and statistical analysis of the LiDAR dataset.

Process Date/Time: 2011-12-19 00:00:00

Process Step 5

CC ID: 623824
Description:

Breaklines defining lakes, greater than two acres, and double-line streams, wider than 100 feet (30.5 meters), were compiled using

digital photogrammetric techniques as part of the hydrographic flattening process and provided as a geodatabase containing ESRI

Polyline Z and Polygon Z feature classes. Breaklines defining water bodies and streams were compiled for this task order. The breaklines

were used to perform the hydrologic flattening of water bodies, and gradient hydrologic flattening of double line streams. Lakes,

reservoirs and ponds, at a nominal minimum size of two (2) acres or greater, were compiled as closed polygons. The closed water bodies

were collected at a constant elevation. Rivers and streams, at a nominal minimum width of 100 feet (30.5 meters), were compiled in the

direction of flow with both sides of the stream maintaining an equal gradient elevation. The hydrologic flattening of the LiDAR data

was performed for inclusion in the National Elevation Dataset (NED). For this specific project, NOAA requested that Woolpert define

the Strom Thurmond Reservoir using a contour set to match the water level used for the portion of the reservoir located in Columbia

County. This elevation is 323.55 survey feet. The Columbia county data was acquired several months prior to the Burke, Richmond, and

Lincoln Counties. Due to this, the water levels in the reservoir were different. Woolpert set the contour to 325.55 survey feet and

classified the las and produced the required products using the contour derived Strom Thurmond Reservoir.

Process Date/Time: 2012-01-12 00:00:00

Process Step 6

CC ID: 623825
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 State Plane projection (NAD83, Georgia East), and vertically referenced to NAVD88 using the Geoid 09 model. Both horizontal

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

1. The data were converted from Georgia State Plane coordinates to geographic (NAD83) coordinates.

2. The data were converted from orthometric (NAVD88) heights to ellipsoidal heights (GRS80) using Geoid09.

3. The data were converted from vertical units of survey feet to meters.

4. Elevation outliers were removed.

Process Date/Time: 2012-08-01 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity (ENT) LAS 1.2 Full Class

Catalog Details

Catalog Item ID: 48181
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-14 14:19+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2019-07-02 15:17+0000
Metadata Record Published: 2018-03-13
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2019-03-14