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Short Citation:
OCM Partners, 2022: 2010 ARC Carroll County Georgia Lidar, https://www.fisheries.noaa.gov/inport/item/49727.

Item Identification

Title: 2010 ARC Carroll County Georgia Lidar
Short Name: ga2010_arc_carrollcounty_m2522_metadata
Status: Completed
Publication Date: 2013-08-13
Abstract:

This metadata record describes the DTM comprised of classified aerial lidar

elevation points, photogrammetrically compiled breaklines and the derived TIN for Carroll

County, GA. This dataset contains the following classifications of points:

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

Class 2 = Ground

Original contact information:

Contact Name: Peter Debick

Contact Org: Carroll County Community Development

Title: GIS Manager

Phone: 770-830-5861

Email: pdebick@carrollcountyga.com

Purpose:

The lidar DEM data was collected for the Carroll County, GA area. All lidar returns

were classified using the default classes of Terrascan processing software for Unclassified

Points (class 1), Ground points (class 2), Water points (class 9), Overlap points (class 12).

The lidar ground points are supplemented with photogrammmetrically compiled breaklines from

digital imagery collected during the same project time frame as the lidar. The ground class

points, often refered to as "bald earth" are then used as an input to proprietary and publicly

available processing software to generate a Triangulated Irregular Network (TIN) model.

Classified lidar DEMs and derived TIN models are useful for a variety of applications, such

as aiding in contour generation, development of digital surface models, 3D modeling, flood

plane mapping, viewshed analysis and the production of orthophotos.

Notes:

10372

Supplemental Information:

Support of the FEMA's FIRM program.

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

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2522/supplemental/ga2010_carrollcounty.KMZ

A LiDAR Report from the vendor for this data set may be viewed here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2522/supplemental/CarrollCo_GA_QCreport.pdf

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None TIN

Spatial Keywords

Thesaurus Keyword
UNCONTROLLED
Carroll County Carroll County
Carroll County City of Bowden
Carroll County City of Bremen
Carroll County City of Carrollton
Carroll County City of Mt. Zion
Carroll County City of Roopville
Carroll County City of Villa Rica
Carroll County City of Whitesburg

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

Atlanta Regional Commission, Kucera International, the Office for Coastal Management,

or its partners.

Support Roles

Data Steward

CC ID: 674360
Date Effective From: 2013-08-13
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: 674362
Date Effective From: 2013-08-13
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: 674363
Date Effective From: 2013-08-13
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: 674361
Date Effective From: 2013-08-13
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: 1134236
W° Bound: -85.35502987
E° Bound: -84.79537117
N° Bound: 33.82310039
S° Bound: 33.417721

Extent Group 1 / Time Frame 1

CC ID: 1134233
Time Frame Type: Discrete
Start: 2010-01-03

Extent Group 1 / Time Frame 2

CC ID: 1134234
Time Frame Type: Discrete
Start: 2010-01-04

Extent Group 1 / Time Frame 3

CC ID: 1134235
Time Frame Type: Discrete
Start: 2010-01-05

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

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

;

Data Access Constraints:

None

Data Use Constraints:

In some areas of heavy vegetation or forest cover, there may be relatively few ground points in the LiDAR data.

TINing the points produces large triangles and hence the elevations may be less accurate within such areas.

Elevation values for open water surfaces are not valid elevation values because few LiDAR points are returned

from water surfaces. Triangles were created across water surfaces by interpolating from the nearest land points.

Distribution Information

Distribution 1

CC ID: 740989
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=2522
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: 740990
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2522/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 740992
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 740993
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 3

CC ID: 740994
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/2522/supplemental/ga2010_carrollcounty.KMZ
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for the ARC Topographic Carroll County

LiDAR survey area in Georgia.

Activity Log

Activity Log 1

CC ID: 674387
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 674386
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: 718284
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 740991
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Accuracy:

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. The standard system results for horizontal accuracy are less than 1 meter.; Quantitative Value: 1 meters, Test that produced the value: This value is computed by comparing ground control 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:

Vertical 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 for this project was tested with a resultant RMSE of 0.030 meter (0.099 feet).; Quantitative Value: 0.030 meters, Test that produced the value: This value is computed by comparing ground control elevation to the classified LiDAR ground surface and represents the RMSE of residuals on controls within the project area.

Completeness Report:

LiDAR data is collected for the project area. Post processing of the simultaneously acquired GPS/INS is performed and applied to the laser returns to output a point cloud in the specified project coordinate system and datums. The point cloud data is then subjected to automated classification routines to assign all points in the point cloud to ground, water, overlap and unclassified point classes. Anomalous laser returns that occur infrequently are removed entirely from the data set. The ground class points are then compared to surveyed ground control to develop an accuracy measure of the laser terrain data.

Conceptual Consistency:

LiDAR data is collected within the project area, processed and verified against control.

Lineage

Sources

Aerial Digital Imagery

CC ID: 1134217
Extent Type: Discrete
Extent Start Date/Time: 2010-01-31
Source Contribution:

New digital aerial imagery and GPS/IMU data was recorded for the defined project area. | Source Geospatial Form: remote-sensing image | Type of Source Media: disc

Ground control

CC ID: 1134218
Publish Date: 2010-01-01
Extent Type: Discrete
Extent Start Date/Time: 2010
Source Contribution:

Targeted ground control is used to create a digital control file and

control report as well as QC check of LiDAR accuracy. Predefined points (NGS when

available) within the project area are targeted.

| Source Geospatial Form: tabular digital data | Type of Source Media: disc

LiDAR Data

CC ID: 1134219
Extent Type: Discrete
Extent Start Date/Time: 2010-01-03
Source Contribution:

Aerial LiDAR and GPS/IMU data was recorded for the defined project area. | Source Geospatial Form: Remote sensing image | Type of Source Media: disc

Triangulated Irregular Network

CC ID: 1134220
Publish Date: 2010-01-01
Extent Type: Discrete
Extent Start Date/Time: 2010
Source Contribution:

Using the lidar elevation points and compiled breaklines as inputs, a Triangulated Irregular Network (TIN) is generated using ESRI ArcGIS software. | Source Geospatial Form: Vector digital data | Type of Source Media: disc

Process Steps

Process Step 1

CC ID: 1134221
Description:

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

Process Date/Time: 2010-01-01 00:00:00

Process Step 2

CC ID: 1134224
Description:

New LiDAR data is captured for the project area using a Leica ALS60 LiDAR instrument in conjunction with a POSAV Applanix GPS/INS system mounted within a Piper Navajo twin engine airplane.

Process Date/Time: 2010-01-01 00:00:00

Process Step 3

CC ID: 1134225
Description:

New aerial digital imagery with airborne GPS/IMU data is acquired for the project area.

Process Date/Time: 2010-01-01 00:00:00

Process Step 4

CC ID: 1134226
Description:

The airborne GPS data is processed in Terratec TerraPos software and then combined with the IMU data in Applanix PosPAC software to determine the LiDAR sensor's angle and orientation in the terrain (project) coordinate system and datums during the survey. The same GPS/IMU processing is performed for the digital imagery to define the orientation parameters of the images to be used in stereo compilation of terrain breaklines.

Process Date/Time: 2010-01-01 00:00:00

Process Step 5

CC ID: 1134227
Description:

LiDAR data is processed using the GPS/INS solution. Data is classified to produce:

Class 1: unclassified points

Class 2: ground points

Class 9: water points

Class 12: overlap points

Process Date/Time: 2010-01-01 00:00:00

Process Step 6

CC ID: 1134228
Description:

The ground class of the processed lidar data is then compared to the ground control and elevation differences between the lidar surface and surveyed elevation are recorded in tabular form. Vertical accuracy statistices are then developed to produce vertical RMSE and overall accuracy estimates and reports.

Process Date/Time: 2010-01-01 00:00:00

Process Step 7

CC ID: 1134229
Description:

Photogrammetrically compiled breaklines are compiled to supplement the lidar ground points.

Process Date/Time: 2010-01-01 00:00:00

Process Step 8

CC ID: 1134230
Description:

Water polygons are buffered to remove any lidar points within the polygon to flatten these surfaces.

Process Date/Time: 2010-01-01 00:00:00

Process Step 9

CC ID: 1134231
Description:

Breaklines are buffered to remove lidar surface points on or near the breakline.

Process Date/Time: 2010-01-01 00:00:00

Process Step 10

CC ID: 1134222
Description:

The Traingulated Irregular Network is generate with ESRI ArcGIS software.

Process Date/Time: 2010-01-01 00:00:00

Process Step 11

CC ID: 1134223
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 GA State Plane coordinates and NAVD88 (orthometric) heights in feet. OCM performed the

following processing for data storage and Digital Coast provisioning purposes:

1. The data were converted from GA State Plane coordinates to geographic coordinates.

2. The data were converted from NAVD88 (orthometric) heights in feet to GRS80 (ellipsoid) heights in meters using Geoid 03.

3. The data were filtered to remove outliers.

4. The LAS data were sorted by latitude and the headers were updated.

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

Catalog Details

Catalog Item ID: 49727
GUID: gov.noaa.nmfs.inport:49727
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