Short Citation:
Office for Coastal Management, 2021: 2017 NOAA/OCM Unmanned Aerial System Lidar: Grand Bay NERR, https://www.fisheries.noaa.gov/inport/item/48142.

Item Identification

Title: 2017 NOAA/OCM Unmanned Aerial System Lidar: Grand Bay NERR
Short Name: 2017 gbnerr uas lidar m8386
Status: Completed
Publication Date: 2017-10-15
Abstract:

Quantum Spatial (QSI) and PrecisionHawk (PH) collected lidar for test sites within the Grand Bay National Estuarine Research Reserve (NERR) using an unmanned aerial system (UAS). Four sites were flown, covering a total of 177 acres. A fixed-wing PH Lancaster (revision 5) platform was used, carrying a Velodyne Puck VLP-16 based lidar system. The system provides 2 returns (strongest and last) with a pulse rate of 300 kHz using a 903 nm wavelength laser. Flights were conducted from May 9-11, 2017 and were flown at 50 meters above ground level.

Specifications for the collection included 30 pulses per square meter and 0.10 meter RMSE vertical accuracy in non-vegetated areas. The average first return density was over 105 points per square meter with an average ground classified density of over 3 points per square meter.

Deliverables included the lidar point cloud in LAS/LAZ format. Data were delivered in UTM zone 16 NAD83(2011) horizontally and NAVD88 (Geoid12b) meters vertically.

Lidar point clouds were projected back to geographic coordinates for storage in the Digital Coast Data Access Viewer and the vertical datum was converted to the ellipsoid.

Original contact information:

Contact Org: NOAA Office for Coastal Management

Phone: 843-740-1202

Email: coastal.info@noaa.gov

Purpose:

Test the ability to provide lidar data from a UAS and determine if it is better able to penetrate marsh grasses.

Notes:

10165

Supplemental Information:

A final report for this project may be viewed at:

https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/8386/supplemental/NOAA_UAS_Grand_Bay_LiDAR_Technical_Data_Report_Combined.pdf

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 Bare earth
None Bare ground
None Bathymetry/Topography
None Drone
None Elevation data
None High-resolution
None Lidar
None Light Detection and Ranging
None UAS
None Unmanned Aerial System

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords Continent > North America > United States Of America > Mississippi
None Grand Bay
None Grand Bay National Estuarine Research Reserve
None Grand Bay NERR
None Mississippi
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: None Planned
Data Presentation Form: Map (digital)
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of the Quantum Spatial, PrecisionHawk, the Office for Coastal Management, or its partners.

Data Set Credit: NOAA, Quantum Spatial, PrecisionHawk, GBNERR

Support Roles

Data Steward

CC ID: 622215
Date Effective From: 2017-10-15
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: 622217
Date Effective From: 2017-10-15
Date Effective To:
Contact (Organization): Office for Coastal Management (OCM)
Address: 2234 South Hobson Avenue
Charleston, SC 29405-2413
URL: https://www.coast.noaa.gov/

Metadata Contact

CC ID: 622218
Date Effective From: 2017-10-15
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: 622216
Date Effective From: 2017-10-15
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: 622221
W° Bound: -88.42051
E° Bound: -88.41041
N° Bound: 30.41069
S° Bound: 30.35701

Extent Group 1 / Time Frame 1

CC ID: 622220
Time Frame Type: Range
Start: 2017-05-09
End: 2017-05-11

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

;

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: 728148
Start Date: 2018-02-27
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=8386
Distributor: Office for Coastal Management (OCM) (2017-10-15 - Present)
File Name: Customized Download
Description:

Customized Download allowing user to pick projection, datum, file format, etc.

File Type: Zip
Compression: Zip

Distribution 2

CC ID: 743612
Start Date: 2018-02-27
End Date: Present
Download URL: https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/8386
Distributor: Office for Coastal Management (OCM) (2017-10-15 - Present)
File Name: Bulk Download
Description:

Simple download of data files.

File Type: LAZ

URLs

URL 1

CC ID: 743615
URL: http://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/8386/supplemental/2017_GBNERR_UAS_area.kmz
Name: 2017_GBNERR_UAS_area.kmz
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

Browse graphic showing the area of coverage.

URL 2

CC ID: 858186
URL: http://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/8386/supplemental/
Name: Technical report
URL Type:
Online Resource
File Resource Format: pdf
Description:

Contractor technical report from data collection.

Activity Log

Activity Log 1

CC ID: 622243
Activity Date/Time: 2017-09-25
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 622242
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: 717187
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743613
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Data Quality

Horizontal Positional Accuracy:

unknown

Vertical Positional Accuracy:

Vertical Accuracy reporting is designed to meet guidelines presented in the National Standard for Spatial Data Accuracy (NSSDA) (FGDC, 1998) and the ASPRS Guidelines for Vertical Accuracy Reporting for LiDAR Data V1.0 (ASPRS, 2014). The statistical model compares known ground survey points (GSPs) to the closest laser point. Vertical accuracy statistical analysis uses ground survey points in open areas where the LiDAR system has a "very high probability" that the sensor will measure the ground surface and is evaluated at the 95th percentile.

For the Grand Bay NERR area, NOAA and Grand Bay NERR collected 106 points in non-vegetated areas for comparison. Analysis indicated a vertical RMSE of 0.072 meters. Non-parametric examination of the errors showed a 95% confidence level of 0.145 meters.

; Quantitative Value: 0.072 meters, Test that produced the value: Tested to meet FVA at a 95 percent confidence level in meters.

Completeness Report:

LiDAR data has been collected and processed for all areas within the project study area.

Conceptual Consistency:

Upon receipt from vendor (Quantum Spatial), all LiDAR data was independently reviewed by staff from the NOAA Office for Coastal Management (OCM) to ensure project specifications were met. All data were inventoried for completeness and data were checked for quality, which included examining LiDAR data for errors associated with internal data consistency, model quality, and accuracy.

Lineage

Sources

Processed Lidar Data

CC ID: 858187
Contact Role Type: Originator
Contact Type: Organization
Contact Name: Quantum Spatial, Inc

Process Steps

Process Step 1

CC ID: 622207
Description:

The LiDAR survey occurred between May 9, 2017 and May 11, 2017 using a Velodyne Puck VLP-16 laser system mounted in PrecisionHawk's Lancaster Rev 5 Dual-Frequency GPS UAS and flown by PrecisionHawk pilots. Upon completion of data acquisition, Precision Hawk processed SBETs and raw point data into geolocated swaths. Processing tasks included GPS control computations, smoothed best estimate trajectory (SBET) calculations, kinematic corrections, and calculation of laser point position. Ground control data was collected by Precision Hawk to be used in the post-processing and calibration of the LIDAR flights. Following calibration, QSI initiated a suite of automated and manual techniques to classify the LiDAR points and create the requested deliverables. Processing methodologies were tailored for the landscape.

Classifications were as follows:

Unclassified (class 1) - Laser returns that are not included in the ground class or other vegetation classes, retained in order to avoid false vegetation classing within roads or other bare ground surfaces.

Ground (class 2) - Laser returns that are determined to be ground using automated and manual cleaning algorithms.

Low Noise (class 7) - Laser returns that are determined to be artificial points below the ground surface.

Water (class 9) - Laser returns that are determined to be water using manual cleaning techniques.

Near Ground Noise (class 14) - Laser returns that are determined to be artificial points between 0 and 20 meters above the ground surface.

High Noise (class 18) - Laser returns that are determined to be artificial points, equal to or greater than 20 meters above the ground surface.

Process Date/Time: 2017-01-01 00:00:00

Process Step 2

CC ID: 622208
Description:

The NOAA Office for Coastal Management (OCM) received the files in laz format. The files contained Lidar elevation and intensity measurements. The data were in UTM zone 16 (NAD83 2011 Epoch 2010.0) and NAVD88 (Geoid12b) vertical meters. OCM performed the following processing to the data to make it available within the Digital Coast:

1. The data were converted from UTM to geographic coordinates.

2. The data were converted from NAVD88 (orthometric) heights to NAD83(2011) ellipsoid heights using Geoid12b grids.

The data was received without a metadata record. This record was produced based on the data quality report.

Process Date/Time: 2017-09-01 00:00:00
Process Contact: Office for Coastal Management (OCM)
Source: Processed Lidar Data

Catalog Details

Catalog Item ID: 48142
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