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Distribution Info
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Lineage
Child Items
Catalog Details

Summary

Browse Graphic

Short Citation
OCM Partners, 2024: 2012 USACE HSDRRS Lidar: New Orleans, https://www.fisheries.noaa.gov/inport/item/49764.
Full Citation Examples

Abstract

Acquisition of Light Detection and Ranging (LiDAR) elevation data was for the Hurricane and Storm Damage Risk Reduction System (HSDRRS). In February 2012,

USACE, Contracting Division contracted with The Atlantic Group to provide acquisition of Light Detection and Ranging (LiDAR) elevation data in the Hurricane and Storm Damage Risk Reduction System, St. Charles, Jefferson, Orleans, St. Bernard and Plaquemines Parishes, LA. This data will be used to support interior drainage modeling. LiDAR data should be collected to fully capture the total interior of the HSDRRS, including floodwalls, structures, and levees, and 200 feet outside of the HSDRRS to water's edge as appropriate. The project shall include capture of LiDAR data and the creation of digital elevation models derived from the LiDAR. The project area is approximately 418.4 sq. miles, including a 200' buffer. The purpose of the survey is to obtain measurements of the bare ground surface, as well as top surface feature elevation data for providing geometry input to USACE hydrodynamic and other numerical models as well as for performing economic related assessments.

Upon receipt of data, the NOAA Office for Coastal Management (OCM) noted that many areas have lidar points over water that are classified as ground. This was mainly seen in lidar points over Lake Pontchartrain. In these areas, those points were reclassified from ground (2) to unclassified (1). In other areas, however, the user should be aware that points over water may be classified as ground.

In addition to the lidar point data, bare earth Digital Elevation Models (DEMs), at a 2 ft grid spacing, created from the lidar point data are also available. These data are available for download here: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6352

Breaklines created from the lidar are also available for download in shp format at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/6350/breaklines

The DEM and breakline products have not been reviewed by the NOAA Office for Coastal Management (OCM) and any conclusions drawn from the analysis of this information are not the responsibility of NOAA, OCM or its partners.

Original contact information:

Contact Name: Patrick Robinson

Contact Org: Atlantic Group

Title: LiDARManager

Phone: 256-971-9991

Email: probinson@theatlgrp.com

Distribution Information

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

  • Simple download of data files.

Access Constraints:

None

Use Constraints:

None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.

Controlled Theme Keywords

elevation

Child Items

Type Title
Entity LAS

Contact Information

Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202

Metadata Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202

Extents

Geographic Area 1

-90.609656° W, -89.609035° E, 30.169328° N, 29.632568° S

Time Frame 1
2012-03-04 - 2012-03-25

Item Identification

Title: 2012 USACE HSDRRS Lidar: New Orleans
Short Name: la2012_usace_new_orleans_m6350_metadata
Status: Completed
Publication Date: 2017-08-12
Abstract:

Acquisition of Light Detection and Ranging (LiDAR) elevation data was for the Hurricane and Storm Damage Risk Reduction System (HSDRRS). In February 2012,

USACE, Contracting Division contracted with The Atlantic Group to provide acquisition of Light Detection and Ranging (LiDAR) elevation data in the Hurricane and Storm Damage Risk Reduction System, St. Charles, Jefferson, Orleans, St. Bernard and Plaquemines Parishes, LA. This data will be used to support interior drainage modeling. LiDAR data should be collected to fully capture the total interior of the HSDRRS, including floodwalls, structures, and levees, and 200 feet outside of the HSDRRS to water's edge as appropriate. The project shall include capture of LiDAR data and the creation of digital elevation models derived from the LiDAR. The project area is approximately 418.4 sq. miles, including a 200' buffer. The purpose of the survey is to obtain measurements of the bare ground surface, as well as top surface feature elevation data for providing geometry input to USACE hydrodynamic and other numerical models as well as for performing economic related assessments.

Upon receipt of data, the NOAA Office for Coastal Management (OCM) noted that many areas have lidar points over water that are classified as ground. This was mainly seen in lidar points over Lake Pontchartrain. In these areas, those points were reclassified from ground (2) to unclassified (1). In other areas, however, the user should be aware that points over water may be classified as ground.

In addition to the lidar point data, bare earth Digital Elevation Models (DEMs), at a 2 ft grid spacing, created from the lidar point data are also available. These data are available for download here: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6352

Breaklines created from the lidar are also available for download in shp format at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/6350/breaklines

The DEM and breakline products have not been reviewed by the NOAA Office for Coastal Management (OCM) and any conclusions drawn from the analysis of this information are not the responsibility of NOAA, OCM or its partners.

Original contact information:

Contact Name: Patrick Robinson

Contact Org: Atlantic Group

Title: LiDARManager

Phone: 256-971-9991

Email: probinson@theatlgrp.com

Purpose:

The purpose of the survey is to obtain measurements of the bare ground surface, as well as top surface feature elevation data for providing geometry input to USACE hydrodynamic and other numerical models as well as for performing economic related assessments.

Notes:

10408

Supplemental Information:

The lidar report may be accessed here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/6350/supplemental/la2012_usace_new_orleans_m6350_lidar_report.pdf

The survey report may be accessed here:

https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/6350/supplemental/la2012_usace_new_orleans_m6350_survey_report.pdf

Keywords

Theme Keywords

Thesaurus Keyword
ISO 19115 Topic Category
elevation
UNCONTROLLED
None ArcMap
None Corps of Engineers
None ESRI
None HSDRRS
None Hurricane
None New Orleans District
None Risk Reduction System

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
Distribution Liability:

Any conclusions drawn from the analysis of this information are not the responsibility of the Atlantic Group, USACE, NOAA, the NOAA Office for Coastal Management (OCM) or its partners.

Data Set Credit: Paul Weyant, Patrick Robinson, Josh Hester

Support Roles

Data Steward

CC ID: 676107
Date Effective From: 2017-08-12
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: 676109
Date Effective From: 2017-08-12
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: 676110
Date Effective From: 2017-08-12
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: 676108
Date Effective From: 2017-08-12
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: 1140081
W° Bound: -90.609656
E° Bound: -89.609035
N° Bound: 30.169328
S° Bound: 29.632568

Extent Group 1 / Time Frame 1

CC ID: 1140080
Time Frame Type: Range
Start: 2012-03-04
End: 2012-03-25

Spatial Information

Spatial Representation

Representations Used

Vector: Yes

Access Information

Security Class: Unclassified
Security Classification System:

N/A

Security Handling Description:

Nothing Specified

Data Access Procedure:

This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6350;

Data Access Constraints:

None

Data Use Constraints:

None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.

Distribution Information

Distribution 1

CC ID: 741208
Download URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6350
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: 741209
Download URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/6350/index.html
Distributor:
File Name: Bulk Download
Description:

Simple download of data files.

URLs

URL 1

CC ID: 741211
URL: https://coast.noaa.gov/dataviewer
URL Type:
Online Resource

URL 2

CC ID: 741212
URL: https://coast.noaa.gov/dataregistry
URL Type:
Online Resource

URL 3

CC ID: 741213
URL: https://coast.noaa.gov
URL Type:
Online Resource

URL 4

CC ID: 741214
URL: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/6350/supplemental/la2012_usace_new_orleans_m6350.kmz
Name: Browse Graphic
URL Type:
Browse Graphic
File Resource Format: kmz
Description:

This graphic shows the lidar footprint for the 2012 USACE HSDRRS New Orleans project area.

Activity Log

Activity Log 1

CC ID: 676133
Activity Date/Time: 2017-08-18
Description:

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 676132
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: 718330
Activity Date/Time: 2018-02-08
Description:

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 741210
Activity Date/Time: 2018-03-13
Description:

Partial upload to move data access links to Distribution Info.

Technical Environment

Description:

ArcMAP V.10.1 ; LP360 V.2011.1.54.1 ; Microstation V8 ; ALTMnav ; Dashmap ;

Data Quality

Accuracy:

A minimum of 20 test points where selected for each land cover class (except HSDRRS Class 7) identified per 100 Sq miles. Therefore, 120 test points were selected for the six land cover classes specified above per 100 Sq miles, plus 20 test points each for any additional land cover classes added. Additionally, test points were geographically distributed throughout the project area. Test points were carefully selected in areas of the highest PDOP to evaluate DEM accuracy under trees and in vegetation representative of the study area. A minimum of 50 test points was collected along the HSDRRS levees to enable an accuracy assessment for the HSDRRS. These levee test points where spaced at least 0.25 miles apart, but they do not need to cover the entire HSDRRS levee system.

Horizontal Positional Accuracy:

The data must meet the NSSDA RMSEr of 2.2 ft (0.67 m) and the NSSDA Accuracyr of 95% confidence level is 3.80 ft (1.16 m). Horizontal point accuracy is a function of angular origination of the pulse; IMU orientation; the scanner encoder and ranging function and will vary depending on the proposed point density selected for the collection. Statistically, the error is roughly 1/3 of the illuminated foot print on the ground and is a function of the beam divergences.

Vertical Positional Accuracy:

Based on the vertical accuracy testing conducted by The Atlantic Group, LLC using NSSDA methodology, the dataset tested 12.2 cm for vertical accuracy at 95% confidence level in open terrain. LiDAR vertical data accuracy determination shall employ the National Standard for Spatial Data Accuracy (NSSDA). Contracted to meet 18cm (RMSE) or better.

Completeness Report:

All data is complete to standards as specified.LIDAR raster data is visually inspected for completeness to ensure that any gaps between flight lines of required collection area. LIDAR is self-illuminating and has minimal cloud penetration capability. Water vapor in steam plumes or particulates in smoke may cause reflection of LIDAR signals and loss of elevation information beneath these plumes. Glass structures and roofs may appear transparent to the LIDAR signal and therefore may not register on the reflective surface.

Conceptual Consistency:

QC/QA process shall include reviews of flight alignments and

completeness of supporting data. The USACE New Orleans district or its designee may perform

additional QC/QA testing. The root mean square error (RMSE) is used to estimate both

horizontal and vertical accuracy. RMSE is the square root of the average of the set of squared

differences between dataset coordinate values and coordinate values from an independent source.

Bare-earth processed data for this acquisition block comply with the following accuracy requirements for Artifact/Feature removal: artifacts - 90%; outliers - 95%; vegetation - 95%; buildings - 98%. All LAS formatted LIDAR data are validated using commercial GIS software to ensure proper formatting and loading before delivery. This validation procedure ensures that data on delivery media is in correct physical format and is readable.

of higher accuracy for identical points. If those differences are normally distributed and average

zero, 95 percent of any sufficiently large sample should be less than 1.96 times the RMSE.

Therefore 9-centimeter RMSE can be referred to as "18-centimeter accuracy at the 95-percent

confidence level." Following that convention, the vertical accuracy of any DEM is defined as

1.96 times the RMSE of linearly interpolated elevations in the DEM, as compared with known

elevations from high-accuracy test points. DEMs should have a maximum RMSE as specified to

meet its required vertical accuracy. The contractor must field verify the vertical accuracy of this

DEM to ensure that the RMSE requirement is satisfied for all land cover classes that

predominate within the floodplain being studied.

Lineage

Sources

LiDAR Acquisition for the Hurricane and Storm Damage Risk Reduction System

CC ID: 1140074
Extent Type: Range
Extent Start Date/Time: 2012-03-04
Extent End Date/Time: 2012-03-25
Source Contribution:

Lidar | Source Geospatial Form: remote-sensing image | Type of Source Media: digital tape media

Process Steps

Process Step 1

CC ID: 1140075
Description:

The ABGPS, IMU, and raw Optech LiDAR data are integrated into the Optech post processor software. The resultant file is in a LAS binary file format. The LAS file version 1.2 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#, intensity value, xyz, etc.). The resultant points are produced in the geodetic coordinates referenced to the NAD83 horizontal datum and NAVD88 2004.65 vertical datum.

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

Process Step 2

CC ID: 1140076
Description:

The unedited data are classified to facilitate the application of the appropriate feature extraction filters. A combination of proprietary filters is applied as appropriate for the production of bare earth digital terrain models (dtms). 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. The LiDAR mass points were delivered in American Society for Photogrammetry and Remote Sensing LAS 1.2 format. The header file for each dataset is complete as define by the LAS 1.2 specification. The data was classified as follows: Class 1 = Unclassified. This class includes all non-ground classified points. Class 2 = Ground. Class 7 = Low Points. Class 9 = water. Class 12 = Overlap.

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

Process Step 3

CC ID: 1140077
Description:

Conversion from Geodetic coordinates NAD83 into Louisiana state plane zone 1702 using NAD83 and conversion from ellipsoid heights (meters) into orthometric heights using NAVD88 (US Survey Foot). Files are orthogonally tiled based to a 1500m x 1500m extent, and labeled with a "Tile_ID" attribute.

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

Process Step 4

CC ID: 1140078
Description:

The NOAA Office for Coastal Management (OCM) received 525 files in las 1.2 format. LAS files from the 2004.65 folder were processed. The files contained lidar intensity and elevation measurements for the USACE HSDRRS project area. The data were in LA State Plane, Zone 1702 (NAD83 2007) coordinates and in NAVD88 elevations in feet. OCM performed the following processing on the data for Digital Coast storage and provisioning purposes:

1. The data were converted from las to laz format.

2. Spaces in the filenames were converted to underscores.

3. The LAStools software scripts lasinfo and lasvalidate were run on the las files to check for errors.

4. The data were converted from GPS seconds of the week to adjusted GPS time.

5. In 46 files, reclassified points that were over Lake Pontchartrain from ground (2) to unclassified (1).

6. Reclassified outlier elevation points (greater than 2000 ft and less than -100 ft) to noise (7).

7. Internal OCM scripts were run to convert the files from LA State Plane Zone 1702 coordinates to geographic coordinates and to convert from NAVD88 elevations in feet to ellipsoid elevations in meters using Geoid09.

8. Internal OCM scripts were run on the las files to assign the geokeys, to sort the data by gps time and zip the data to database and to http.

Process Date/Time: 2017-08-15 00:00:00

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Entity LAS

Catalog Details

Catalog Item ID: 49764
GUID: gov.noaa.nmfs.inport:49764
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-15 15:22+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