2010 U.S. Geological Survey Topographic LiDAR: Atchafalaya Basin, Louisiana
Data Set (DS) | OCM Partners (OCMP)GUID: gov.noaa.nmfs.inport:50113 | Updated: August 9, 2022 | Published / External
Summary
Short Citation
OCM Partners, 2025: 2010 U.S. Geological Survey Topographic LiDAR: Atchafalaya Basin, Louisiana, https://www.fisheries.noaa.gov/inport/item/50113.
Full Citation Examples
The Light Detection and Ranging (LiDAR) dataset is a survey of the Atchafalaya Basin in south-central Louisiana. The entire survey area encompasses 981 square miles. The LiDAR point cloud was flown at a
nominal post spacing of 1.0 meters for unobscured areas. The LiDAR data is in compliance with the U.S. Geological Survey National Geospatial Program Guidelines and Base Specifications,
Version 13-ILMF 2010. The Flightlines were acquired by Northrop Grumman, 3001 Operating Unit, which required 10 subsequent missions between December 2, 2010, and December 7, 2010.
Northrop Grumman classified the data into the following ASPRS compliant classes:
Class 1: Processed, but unclassified
Class 2: Bare Earth Ground
Class 3: Low Vegetation
Class 4: Medium Vegetation (also used for manual classification of vegetation returns)
Class 5: High Vegetation
Class 6: Buildings and man-made structures
Class 7: Noise (low or high, manually identified)
Class 9: Water
Class 10: Ignored Ground (Breakline Proximity)
Class 13: Withheld (outliers, blunders, etc.)
Original contact information:
Contact Org: NOAA Office for Coastal Management
Phone: 843-740-1202
Email: coastal.info@noaa.gov
Distribution Information
-
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
-
Simple download of data files.
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and some parts of this data may no longer represent actual surface conditions.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.
Controlled Theme Keywords
elevation
Child Items
No Child Items for this record.
Contact Information
Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov
Extents
-91.880079° W,
-91.156365° E,
30.558588° N,
29.670848° S
2010-12-02 - 2010-12-07
Item Identification
Title: | 2010 U.S. Geological Survey Topographic LiDAR: Atchafalaya Basin, Louisiana |
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Short Name: | usgs2010_AtchafalayaBasin_m1433_metadata |
Status: | Completed |
Publication Date: | 2013-01 |
Abstract: |
The Light Detection and Ranging (LiDAR) dataset is a survey of the Atchafalaya Basin in south-central Louisiana. The entire survey area encompasses 981 square miles. The LiDAR point cloud was flown at a nominal post spacing of 1.0 meters for unobscured areas. The LiDAR data is in compliance with the U.S. Geological Survey National Geospatial Program Guidelines and Base Specifications, Version 13-ILMF 2010. The Flightlines were acquired by Northrop Grumman, 3001 Operating Unit, which required 10 subsequent missions between December 2, 2010, and December 7, 2010. Northrop Grumman classified the data into the following ASPRS compliant classes: Class 1: Processed, but unclassified Class 2: Bare Earth Ground Class 3: Low Vegetation Class 4: Medium Vegetation (also used for manual classification of vegetation returns) Class 5: High Vegetation Class 6: Buildings and man-made structures Class 7: Noise (low or high, manually identified) Class 9: Water Class 10: Ignored Ground (Breakline Proximity) Class 13: Withheld (outliers, blunders, etc.) Original contact information: Contact Org: NOAA Office for Coastal Management Phone: 843-740-1202 Email: coastal.info@noaa.gov |
Purpose: |
This regional LiDAR elevation mapping will be used for modeling, predicting landscape change, promoting restoration of ecosystems, and mitigating risks associated with anthropomorphic and natural hazards. |
Notes: |
10757 |
Supplemental Information: |
The project report for this data set may be accessed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1433/supplemental/usgs2010_AtchafalayaBasin_ProjectReport.docx The survey report for this data set may be accessed at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1433/supplemental/usgs2010_AtchafalayaBasin_SurveyReport.pdf A footprint of this data set may be viewed in Google Earth at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1433/supplemental/usgs2010_AtchafalayaBasin_footprint.kmz |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
ISO 19115 Topic Category |
elevation
|
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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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 Northrop Grumman, USGS, the Office for Coastal Management or its partners. |
Data Set Credit: | U.S. Geological Survey |
Support Roles
Data Steward
Date Effective From: | 2013-01 |
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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
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
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
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 |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -91.880079 | |
---|---|---|
E° Bound: | -91.156365 | |
N° Bound: | 30.558588 | |
S° Bound: | 29.670848 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
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Start: | 2010-12-02 |
End: | 2010-12-07 |
Spatial Information
Spatial Representation
Representations Used
Vector: | Yes |
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Access Information
Security Class: | Unclassified |
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Data Access Procedure: |
This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1433 ; |
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
Download URL: | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=1433 |
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Distributor: | |
File Name: | Customized Download |
Description: |
Create custom data files by choosing data area, product type, map projection, file format, datum, etc. |
Distribution 2
Download URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1433/index.html |
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Distributor: | |
File Name: | Bulk Download |
Description: |
Simple download of data files. |
URLs
URL 1
URL: | https://coast.noaa.gov/dataviewer |
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URL Type: |
Online Resource
|
URL 2
URL: | https://coast.noaa.gov |
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URL Type: |
Online Resource
|
URL 3
URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/1433/supplemental/usgs2010_AtchafalayaBasin_footprint.kmz |
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Name: | Browse Graphic |
URL Type: |
Browse Graphic
|
File Resource Format: | kmz |
Description: |
This graphic shows the lidar coverage for the Atchafalaya Basin covering portions of St. Landry, Pointe Coupee, Iberville, St. Martin, St. Mary, Assumption and Iberia Parishes in Louisiana. |
Activity Log
Activity Log 1
Activity Date/Time: | 2016-05-23 |
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Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
Activity Date/Time: | 2017-11-14 |
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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
Activity Date/Time: | 2018-02-08 |
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Description: |
Partial upload of Positional Accuracy fields only. |
Activity Log 4
Activity Date/Time: | 2018-03-13 |
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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; ESRI ArcCatalog 9.3.1.4000 |
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Data Quality
Horizontal Positional Accuracy: |
All ground control processing and adjustment is performed using published coordinate horizontal and vertical datums (e.g. NGS CORS). For deliverables, Corpscon for Windows Version 5.11.08 (geoid 09) was used for horizontal and vertical datum conversion. |
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Vertical Positional Accuracy: |
The accuracy assessment was performed using a standard method to compute the root mean square error (RMSE) based on a comparison of ground control points (GCP) and filtered LiDAR data points. Filtered LiDAR data has had vegetation and cultural features removed and by analysis represents bare earth elevations. Testing was performed prior to gridding of the filtered LiDAR data points and construction of the ERDAS IMG file format. The RMSE figure was used to compute the vertical National Standard for Spatial Data Accuracy (NSSDA). Ground control was established by Northrop Grumman, 3001 Operating Unit. A spatial proximity analysis was used to select edited LiDAR data points contiguous to the relevant GCPs. A search radius decision rule is applied with consideration of terrain complexity, cumulative error and adequate sample size. Cumulative error results from the errors inherent in the various sources of horizontal measurement. These sources include the airborne GPS, GCPs and the uncertainty of the accuracy of the LiDAR data points. This accuracy is achieved prior to the subsampling that occurs through integration with the inertial measurement unit (IMU) positions that are recorded. It is unclear at this time whether the initial accuracy is maintained. The horizontal accuracy of the GCPs is estimated to be in the range of approximately 1 to 1.6 inches. Finally, sample size was considered. The specification for the National Standard for Spatial Data Accuracy is a minimum of 20 points to conduct a statistically significant accuracy evaluation (Minnesota Planning, 1999, Positional Accuracy Handbook, Minnesota Planning Land Management Information Center, St. Paul, Minnesota., p.3). Most statistical texts indicate that a minimum of 30 sample points provide a reasonable Approximation of a normal distribution. The intent of the NSSDA is to reflect the geographic area of interest and the distribution of error in the data set (Federal Geographic Data Committee, 1998, Geospatial National Standard for Spatial Data Accuracy, Federal Geographic Data Committee Secretariat, Reston, Virginia, p.3-4). Additional steps were taken to ensure the vertical accuracy of the LiDAR data including: Step 1: Precision Bore sighting (Check Edge-matching) Step 2: Compare the LiDAR data to the Field Survey (The vertical accuracy requirements meet or exceed the required RMSEz of 18.5cm and the vertical accuracy of 36.3cm at the 95% confidence level). |
Completeness Report: |
The LiDAR data was acquired at a density sufficient to support a one meter post spacing. The bare-earth surface will contain voids in areas that were densely vegetated, covered by bridges, buildings, water, fresh asphalt, sand etc. |
Conceptual Consistency: |
Northrop Grumman, 3001 Operating Unit, used an ALTM 213 system to acquire LiDAR data at a density sufficient to support an one meter post spacing of for unobscured areas. During acquisition the plane was never more than 40 kilometers from a base station. Northrop Grumman acquired flight lines between December 2, 2010, and December 7, 2010 at an altitude of 5000 feet; using a field of view of 34 degrees. The total swath width of each flight line is 931 meters. The distance between flight lines is 690 meters and each flight line has 28 percent overlap. The Atchafalaya Basin Survey was collected under the guidance of a Professional Mapper/Surveyor. |
Lineage
Sources
Atchafalaya Basin LiDAR Survey
Extent Type: | Range |
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Extent Start Date/Time: | 2010-12-02 |
Extent End Date/Time: | 2010-12-07 |
Scale Denominator: | 24000 |
Source Contribution: |
The Atchafalaya Basin LiDAR Survey was acquired for the U.S. Geological Survey and processed by Northrop Grumman, 3001 Operating Unit. | Source Geospatial Form: vector digital data | Type of Source Media: digital tape media |
Process Steps
Process Step 1
Description: |
The ABGPS, inertial measurement unit (IMU), and raw scans are collected during the LiDAR aerial survey. The ABGPS monitors the xyz position of the sensor and the IMU monitors the orientation. During the aerial survey, laser pulses reflected from features on the ground surface are detected by the receiver optics and collected by the data logger. GPS locations are based on data collected by receivers on the aircraft and base stations on the ground. The ground base stations are placed no more than 40 km radius from the flight survey area. |
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Process Date/Time: | 2010-12-01 00:00:00 |
Process Step 2
Description: |
The ABGPS, IMU, and raw scans are integrated using proprietary software developed by Optech and delivered with the Optech ALTM 213 System. The resultant file is in a LAS binary file format. The LAS version 1.2 file format can be easily transferred from one file format to another. It is a binary file format that maintains information specific to the LiDAR data (return number, intensity value, xyz, etc.). The resultant points are produced in the NAD83 UTM Zone 15 coordinate system, with units in meters and referenced to the NAVD88 datum. The LiDAR mass points were processed in American Society for Photogrammetry and Remote Sensing LAS 1.2 format. The header file for each dataset is complete as defined by the LAS 1.2 specification. The datasets were divided into a 1500 meters by 1500 meters tiling scheme. The tiles are contiguous, do not overlap, and are suitable for seamless topographic data mosaics that include no "no data" areas. The names of the tiles include alphabetic column and numeric row designations and all files utilize the LAS file extension. |
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Process Date/Time: | 2010-12-01 00:00:00 |
Process Step 3
Description: |
The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filters are applied as appropriate for the production of bare earth models (DEMs). Interactive editing methods are applied to those areas where it is inappropriate or impossible to use the feature extraction filters, based upon the design criteria and/or limitations of the relevant filters. These same feature extraction filters are used to produce elevation height surfaces. |
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Process Date/Time: | 2011-01-01 00:00:00 |
Process Step 4
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 NAD83 UTM Zone 15 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 converted from UTM Zone 15 (meters) to Geographic coordinates (decimal degrees). 3. ASPRS Class 11 (Withheld) was changed to Class 13 (Withheld). |
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Process Date/Time: | 2013-01-01 00:00:00 |
Catalog Details
Catalog Item ID: | 50113 |
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GUID: | gov.noaa.nmfs.inport:50113 |
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 |