49431
2012 USACE HSDRRS Lidar DEM: New Orleans
la2012_usace_new_orleans_dem_m6352_metadata
Data Set
Published / External
49404
DEMs - partner (no harvest)
Project
Completed
2017-08-12
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 (DEMs) 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.
In addition to this 2 ft bare earth DEM data, the lidar point data, that these DEMs were created from are also available. These data are available for download here: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6350
Breaklines created from the lidar are also available for download in shp format at: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/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.
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.
12098
The lidar report may be accessed here:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/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/geoid12b/6350/supplemental/la2012_usace_new_orleans_m6350_survey_report.pdf
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > LAND SURFACE > TOPOGRAPHY > TERRAIN ELEVATION > TOPOGRAPHICAL RELIEF MAPS
Theme
Global Change Master Directory (GCMD) Science Keywords
EARTH SCIENCE > OCEANS > COASTAL PROCESSES > COASTAL ELEVATION
Theme
ISO 19115 Topic Category
elevation
Spatial
Global Change Master Directory (GCMD) Location Keywords
CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > LOUISIANA
Theme
ArcMap
Theme
DEM
Theme
ESRI
Theme
HSDRRS
Theme
Hurricane
Theme
New Orleans District, Corps of Engineers
Theme
Risk Reduction System
Theme
bare earth
Office for Coastal Management
Charleston
SC
Data Set
As Needed
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.
Paul Weyant, Patrick Robinson, Josh Hester
Data Steward
2017-08-12
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
2017-08-12
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
2017-08-12
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
2017-08-12
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
-90.609656
-89.609035
30.169328
29.632568
Range
2012-03-04
2012-03-25
Yes
Unclassified
N/A
Nothing Specified
This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6352;
None
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.
2017-06-01
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6352
2017-08-12
Organization
NOAA Office for Coastal Management
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
GeoTIFF
GeoTIFF
2017-06-01
https://noaa-nos-coastal-lidar-pds.s3.us-east-1.amazonaws.com/dem/LA_New_Orleans_DEM_2012_6352/index.html
2017-08-12
Organization
NOAA Office for Coastal Management
Bulk Download
Simple download of data files.
GeoTIFF
GeoTIFF
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6350/supplemental/la2012_usace_new_orleans_m6350.kmz
Browse Graphic
Browse Graphic
kmz
This graphic shows the lidar footprint for the 2012 USACE HSDRRS New Orleans project area.
https://coast.noaa.gov/dataviewer
Digital Coast Data Access Viewer
Online Resource
zip
Custom processing app for point cloud and raster data.
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6350
Point cloud source
Online Resource
zip
Point cloud source data for this dataset.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6350/supplemental/la2012_usace_new_orleans_m6350_lidar_report.pdf
Lidar report
Online Resource
pdf
Report from the lidar data collection.
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid12b/6350/supplemental/la2012_usace_new_orleans_m6350_survey_report.pdf
Survey report
Online Resource
pdf
Survey report from the lidar data collection.
2017-08-25
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.
2018-02-13
Partial upload to move data access links to Distribution Info.
ArcMAP V.10.1 ; LP360 V.2011.1.54.1 ; Microstation V8 ; ALTMnav ; Dashmap ;
The TIN models are hydro enforced with breaklines of significant
hydro features (> 100ft width) such as bayous, stream banks, or lakes. Existing breakline data
sets shall be used to the furthest extent possible to minimize manual collection of additional
break lines. The breaklines compiled for the FEMA 2001/2003 LIDAR as well as the 1998 land
and water interface polylines shall be used along the HSDRRS levees as necessary to support
creation of final DEMs.
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.
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.
Cloud Cover: 0
The creation of Triangular Irregular Network (TIN) elevation models and apply linear interpolation procedures to generate
the gridded DEMs at uniform post spacing. TIN post spacing should be smaller than the gridded DEM post spacing. The TIN models should be hydro enforced with breaklines of significant hydro features (> 100ft width) such as bayous, stream banks, or lakeAll data is complete to standards as specified.
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
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.
LiDAR Acquisition for the Hurricane and Storm Damage Risk Reduction System
Organization
The Atlantic Group
Originator
Range
2012-03-04
2012-03-25
Lidar | Source Geospatial Form: remote-sensing image | Type of Source Media: digital tape media
1
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.
2012-01-01T00:00:00
2
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.
2012-01-01T00:00:00
LiDAR Acquisition for the Hurricane and Storm Damage Risk Reduction System
3
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.
2012-01-01T00:00:00
4
Breaklines are manually collected using a first return surface model of the designated project area. After the completion of breaklines they are encoded into the LiDAR surface and used to hydro-flatten all significant water bodies. Once this has been accomplished Digital Elevation Models (DEM's) are created and processed to meet all mapping standards stated within contract.
2012-04-20T00:00:00
5
The NOAA Office for Coastal Management (OCM) received 525 files in .tif format. The bare earth raster files were at a 2 ft grid spacing. The data were in LA State Plane South, Zone 1702 (NAD83 NA11) coordinates and NAVD88 elevations in feet. OCM converted to cloud optimized geotiffs and ingested the data into the Digital Coast Data Access Viewer.
2020-01-21T00:00:00
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
gov.noaa.nmfs.inport:49431
Anne Ball
2017-11-15T15:13:10
Kirk Waters
2024-01-10T18:57:45
2024-01-10
OCM Partners
OCMP
1002
Public
No
2022-03-16
1 Year
2023-03-16