49605
2012 Georgia Department of Natural Resources (GADNR) Topographic LiDAR: Pickens, Rockdale and Troup Counties
2012_GADNR_LiDAR_PickensRockdaleTroupCounties_m1419_metadata
Data Set
Published / External
49401
Lidar - partner (no harvest)
Project
Completed
2012-04-09
NOAA Contract: EA133C11CQ0009
NOAA Task Order Number: T0013
The PSFY12 GADNR Elevation Data Task Order involves: collecting and delivering topographic elevation point data derived from
multiple return light detection and ranging (LiDAR) measurements for portions of 3 counties in Georgia. 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). The counties
included Pickens, Rockdale and Troup. The purpose of the data is for use in coastal management decision making, including applications
such as flood plain mapping and water rights management.
LiDAR was collected at 1.0 points per square meter (1.0m GSD) for the portions of Pickens, Rockdale and Troup Counties.
This area was flown during snow free and leaf-off conditions.
Lifts are planned to meet project specifications and are flown under cloud-free conditions in
order to collect LIDAR points at an average of 1.0 meter point spacing. This allows the user to create Intensity Images, Break Lines,
Hydro Flattened DEMs and fully Classified LiDAR LAS files.
10249
Theme
ISO 19115 Topic Category
elevation
Office for Coastal Management
Charleston
SC
Data Set
As Needed
las
LiDAR points in LAS 1.2 format
none
Any conclusions drawn from the analysis of this information are not the responsibility
of Photo Science, NOAA, GADNR, the Office for Coastal Management or its partners.
Photo Science, Inc. acquired and post-processed the LiDAR for Pickens, Rockdale and Troup counties.
Data Steward
2012-04-09
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Distributor
2012-04-09
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Metadata Contact
2012-04-09
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Point of Contact
2012-04-09
Organization
NOAA Office for Coastal Management
NOAA/OCM
coastal.info@noaa.gov
2234 South Hobson Ave
Charleston
SC
29405-2413
(843) 740-1202
https://coast.noaa.gov
NOAA Office for Coastal Management Home Page
Online Resource
Ground Condition
-85.215673
-83.90863
34.576794
32.854996
Range
2012-02-25
2012-04-09
Yes
Unclassified
This data can be obtained on-line at the following URL:
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1419
;
None
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. These data
depict the heights at the time of the survey and are only accurate for that time.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1419
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1419/index.html
Bulk Download
Simple download of data files.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1419/supplemental/2012_PS_Georgia_LiDAR_Footprints.kmz
Browse Graphic
Browse Graphic
kmz
This graphic shows the lidar coverage for Pickens County, Rockdale County and Troup County in Georgia.
https://coast.noaa.gov
Online Resource
https://coast.noaa.gov/dataviewer
Online Resource
2016-05-23
Date that the source FGDC record was last modified.
2017-11-14
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.
2018-02-08
Partial upload of Positional Accuracy fields only.
2018-03-13
Partial upload to move data access links to Distribution Info.
The project area requires LiDAR to be collected on average of 1.0 meter point spacing
or better and vertical accuracy of 15.0 centimeters RMSE or better to support 2' contour
generation when combined with breaklines.
The LiDAR data was compiled to meet a 1 meter horizontal accuracy. The calibration of
the LiDAR sensor itself and the calibration process of the data produced by this sensor ensure
that this accuracy is met.
; Quantitative Value: 1.0 meters, Test that produced the value: Value stated in meters
The classified LiDAR data was tested by Photo Science, Inc. for vertical accuracy. Photo Science collected
a total of 33 ground control points for use in verifying the vertical accuracy of the classified LiDAR data in Pickens,
Rockdale and Troup Counties. These points were tested against the classified LiDAR data and a vertical adjustment was made
to the classified LiDAR for each county in order to obtain a higher level of accuracy. All data are seamless from one tile
to the next, no gaps or no data areas. The vertical unit of the data file is in survey feet with 2-decimal point precision.
; Quantitative Value: 0.0381 meters, Test that produced the value: RMSE in meters of classified LiDAR
Datasets contain complete coverage of tiles.
Deliverables were tested by Photo Science, Inc. vertical accuracy. All data are seamless
from one tile to the next, no gaps or no data areas.
1
Applanix software was used in the post processing of the
airborne GPS and inertial data that is critical to the positioning
and orientation of the sensor during all flights. POSPac MMS provides
the smoothed best estimate of trajectory (SBET) that is necessary
for Optech's post processor to develop the point cloud from the
LiDAR missions. The point cloud is the mathematical three dimensional
collection of all returns from all laser pulses as determined from
the aerial mission. At this point this data is ready for analysis,
classification, and filtering to generate a bare earth surface model
in which the above ground features are removed from the data set.
The point cloud was manipulated within the Optech or Leica software; GeoCue,
TerraScan, and TerraModeler software was used for the automated
data classification, manual cleanup, and bare earth generation from
this data. Project specific macros were used to classify the ground
and to remove the side overlap between parallel flight lines.
All data was manually reviewed and any remaining artifacts removed
using functionality provided by TerraScan and TerraModeler.
Class 2 LIDAR was used to create a bare earth surface model. The surface model was then used
to heads-up digitize 2D breaklines of inland streams and rivers. Inland Ponds and Lakes of 2 acres or greater were also collected.
Elevation values were assigned to all Inland Ponds and Lakes using TerraModeler functionality.
Elevation values were assigned to all Inland Streams and Rivers using Photo Science proprietary software.
All Class 2 LIDAR data falling inside of the collected breaklines were then classified to Class 9 and Class 2 LIDAR data falling within a
proximity of three feet will be classified to Class 10 using TerraScan macro functionality.
The breakline files were translated to ESRI Shapefile format using ESRI conversion tools.
Data was then run through additional macros to ensure deliverable classification
levels matching LAS ASPRS Classification structure. GeoCue functionality was
used to ensure correct LAS Version. In house software was used as a final
QA/QC check to provide LAS Analysis of the delivered tiles.
Tiles were run through automated scripting
within ArcMap and were combined with the Hydro Flattened Breaklines
to create the 4' DEM. Final DEM tiles were clipped to the tile boundary in order to provide a seamless dataset.
A manual QA review of the tiles was completed in ArcMap and Global Mapper to ensure full coverage with
no gaps or slivers within the project area.
2012-01-01T00:00:00
2
The NOAA Office for Coastal Management (OCM) received topographic files in LAS format. The files contained lidar
elevation and intensity measurements. The data were received in Georgia State Plane West 1002 (NAD83) coordinates
and were vertically referenced to NAVD88 using the Geoid09 model. The vertical units of the data were
feet. OCM performed the following processing for data storage and Digital Coast provisioning purposes:
1. The topographic las files were converted from orthometric (NAVD88) heights to ellipsoidal heights using Geoid09.
2. The topographic las files' vertical units were converted from survey feet to meters.
3. The topographic las files were converted from a Projected Coordinate System (GA SPW 1002) to a Geographic Coordinate system (GCS).
4. The topographic las files' horizontal units were converted from survey feet to decimal degrees.
2012-12-01T00:00:00
58129
Data Set
2012 GA DNR Lidar DEM: Pickens, Rockdale, and Troup Counties
Cross Reference
DEMs derived from this point cloud.
gov.noaa.nmfs.inport:49605
Anne Ball
2017-11-15T15:21:08
SysAdmin InPortAdmin
2022-08-09T17:11:37
2022-03-16
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16