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Short Citation:
OCM Partners, 2022: 2011 USGS Lidar: Baldwin County, AL, https://www.fisheries.noaa.gov/inport/item/50118.

Item Identification

Title: 2011 USGS Lidar: Baldwin County, AL
Short Name: usgs2011_BaldwinCo_LiDAR_m1425_metadata
Status: Completed
Publication Date: 2013-01
Abstract:

USGS Contract: G10PC00026

Task Order Number: G10PD02126

LiDAR was collected at a 2.0 meter nominal post spacing (2.0m GSD) for approximately 329 square miles of Baldwin County, Alabama,

while no snow was on the ground and rivers were at or below normal levels. Project was divided into two separate AOIs, Baldwin West

and Baldwin East. Project meets U.S. Geological Survey National Geospatial Program Base LiDAR Specification, Version 13.

LAS Classifications:

Class 1: Unclassified

Class 2: Bare Earth Ground

Class 5: High Vegetation

Class 7: Noise (Low points)

Class 9: Water

Class 10: Ignored Ground (within 1m of breakline)

Class 12: Overlap

Class 13: Witheld

Purpose:

Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create Intensity Images,

Break Lines and Raster DEMs.

Notes:

10762

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: las
Entity Attribute Overview:

LiDAR points in LAS 1.2 format

Entity Attribute Detail Citation:

none

Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility

of Woolpert, USGS, the Office for Coastal Management or its partners.

Data Set Credit: Photo Science, Inc. flew the LiDAR and processed the data.

Support Roles

Data Steward

CC ID: 691149
Date Effective From: 2013-01
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: 691151
Date Effective From: 2013-01
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: 691152
Date Effective From: 2013-01
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: 691150
Date Effective From: 2013-01
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: 1133338
W° Bound: -88.04525
E° Bound: -87.354075
N° Bound: 30.865296
S° Bound: 30.298128

Extent Group 1 / Time Frame 1

CC ID: 1133337
Time Frame Type: Range
Start: 2011-01-22
End: 2011-01-28

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/#/lidar/search/where:ID=1425

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. These data depict the heights at the time of the survey and are only accurate for that time.

Distribution Information

Distribution 1

CC ID: 743121
Start Date: 2014-07-01
End Date: Present
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1425
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2013-01 - Present)
File Name: Customized Download
Description:

Create custom data files by choosing data area, product type, map projection, file format, datum, etc.

File Type: Zip
Compression: Zip

Distribution 2

CC ID: 743122
Start Date: 2014-07-01
End Date: Present
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1425/index.html
Distributor: NOAA Office for Coastal Management (NOAA/OCM) (2013-01 - Present)
File Name: Bulk Download
Description:

Simple download of data files.

File Type: LAZ

URLs

URL 1

CC ID: 743124
URL: https://coast.noaa.gov/dataviewer
Name: Data Access Viewer
URL Type:
Online Resource
Description:

custom download tool

URL 2

CC ID: 743125
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1425/supplemental/7505-059_Survey_Report_for_East-West_Baldwin_County_Alabama.pdf
Name: Survey report
URL Type:
Online Resource
File Resource Format: pdf
Description:

Survey report for Baldwin County lidar

URL 3

CC ID: 743126
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1425/supplemental/usgs2011_BaldwinCo_LiDAR_footprints.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar coverage for Baldwin Co, Alabama.

URL 4

CC ID: 859911
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1425/supplemental/Baldwin_East_QAReport.doc
Name: QA report - East
URL Type:
Online Resource
File Resource Format: pdf
Description:

QA report for the eastern section of Baldwin County

URL 5

CC ID: 859912
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1425/supplemental/Baldwin_West_QAReport.doc
Name: QA report - West
URL Type:
Online Resource
File Resource Format: pdf
Description:

QA report for the western section of Baldwin County

Activity Log

Activity Log 1

CC ID: 691166
Activity Date/Time: 2016-05-23
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 691165
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: 718722
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 743123
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

MicroStation Version 8; TerraScan Version 10; TerraModeler Version 10;

GeoCue Version 7.0.34.5; ESRI ArcGIS 10.0; QT Modeler v 7.1.1; ALS Post Processor 2.71 Build #15; Global Mapper 12.02; Windows XP Operating System

Data Quality

Accuracy:

The project area requires LiDAR to be collected on 2.0 meter GSD

or better and vertical accuracy of 15.0 centimeters RMSE or better to support 2' contour

generation when combined with breaklines.

Vertical Positional Accuracy:

Classified LAS files were tested by Photo Science for both vertical and horizontal

accuracy. All data is seamless from one tile to the next, no gaps or no data areas.

The vertical unit of the data file is in decimal meters with 2-decimal point precision.

; Quantitative Value: 0.03 meters, Test that produced the value: RMSE in meters

Completeness Report:

Datasets contain complete coverage of tiles.

Conceptual Consistency:

Classified LAS files were tested by Photo Science for both vertical and horizontal accuracy.

All data is seamless from one tile to the next, no gaps or no data areas.

Lineage

Sources

LiDAR

CC ID: 1133332
Publish Date: 2010-01-01
Extent Type: Range
Extent Start Date/Time: 2011-01-22
Extent End Date/Time: 2011-01-28
Source Contribution:

LiDAR points were used to produce the deliverables. | Source Geospatial Form: digital data | Type of Source Media: hard drive

Process Steps

Process Step 1

CC ID: 1133333
Description:

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 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.

The Baldwin County project (G10PD02126) is immediately adjacent to the NGOM Mobile Bay LiDAR project (G10PD00578). A manual review was performed to ensure that the two datasets tied together as seemlessly as possible. Revisions were made to both the LAS and breakline datasets as needed in order to achieve a smooth transition between the two datasets. NGOM Mobile Bay data was used to produce full tile deliverables on the eastern edge of the Baldwin County West dataset and the western edge of the Baldwin County East dataset. Upon completion of the Baldwin County deliverables, revised copies of the NGOM deliverables that border the Baldwin dataset will be provided in order to ensure that the two datasets agree with each other.

All Class 2 LiDAR data inside of the collected breaklines were then classified to Class 9 using TerraScan macro functionality. A buffer of 1 meter was also used around each hydro flattened feature.

The breakline files were then 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 then 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.

Process Date/Time: 2011-01-01 00:00:00
Source: LiDAR

Process Step 2

CC ID: 1133334
Description:

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 UTM Zone 16 (NAD83) coordinates and were vertically referenced to NAVD88 using the Geoid09 model. The vertical units of the data were meters. 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 were horizontally converted from UTM coordinates (m) to NAD83 Geographic coordinates (dd).

3. ASPRS Class 11 (Witheld) was changed to Class 13 (Witheld).

Process Date/Time: 2012-12-01 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov
Source: LiDAR

Process Step 3

CC ID: 1133335
Description:

The withheld points were returned to the original class 11 instead of 13 as changes in the Data Access Viewer system allowed flexibility in class schemas.

Georeferencing of files was reset to EPSG 4893 (NAD83(NSRS2007) 3D)

Process Date/Time: 2019-07-09 00:00:00
Process Contact: NOAA Office for Coastal Management (NOAA/OCM)
Phone (Voice): (843) 740-1202
Email Address: coastal.info@noaa.gov

Catalog Details

Catalog Item ID: 50118
GUID: gov.noaa.nmfs.inport:50118
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:24+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