2012 USACE HSDRRS Lidar DEM: New Orleans

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Atlantic Group
Originator: US Army Corps of Engineers
Originator:
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS), Office for Coastal Management (OCM)
Publication_Date: 20170812
Title: 2012 USACE HSDRRS Lidar DEM: New Orleans
Publication_Information:
Publication_Place: Charleston, SC
Publisher: NOAA's Ocean Service, Office for Coastal Management (OCM)
Online_Linkage: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6352
Online_Linkage:
https://coast.noaa.gov/htdata/raster2/elevation/LA_New_Orleans_DEM_2012_6352
Online_Linkage: https://coast.noaa.gov/dataviewer
Online_Linkage: https://coast.noaa.gov/dataregistry
Online_Linkage: https://coast.noaa.gov
Description:
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 (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://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/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.
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.
Supplemental_Information:
The lidar report may be accessed here: https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6350/supplemental/la2012_usace_new_orleans_m6350_lidar_report.pdf The survey report may be accessed here: https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6350/supplemental/la2012_usace_new_orleans_m6350_survey_report.pdf
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20120304
Ending_Date: 20120325
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -90.609656
East_Bounding_Coordinate: -89.609035
North_Bounding_Coordinate: 30.169328
South_Bounding_Coordinate: 29.632568
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: elevation
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Bathymetry/Topography
Theme_Keyword: ESRI
Theme_Keyword: ArcMap
Theme_Keyword: Hurricane
Theme_Keyword: Risk Reduction System
Theme_Keyword: New Orleans District, Corps of Engineers
Theme_Keyword: HSDRRS
Theme_Keyword: LiDAR
Theme_Keyword: Laser
Theme_Keyword: Digital Elevation Model
Theme_Keyword: DEM
Theme_Keyword: bare earth
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: United States
Place_Keyword: Louisiana
Place_Keyword: New Orleans
Place_Keyword: St. Charles Parish
Place_Keyword: Jefferson Parish
Place_Keyword: Orleans Parish
Place_Keyword: St. Bernard Parish
Place_Keyword: Plaquemines Parish
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.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Atlantic Group
Contact_Person: Patrick Robinson
Contact_Position: LiDARManager
Contact_Address:
Address_Type: mailing and physical
Address: 2223 Drake Avenue
City: Huntsville
State_or_Province: AL
Postal_Code: 35805
Country: United States
Contact_Voice_Telephone: 256-971-9991
Contact_Electronic_Mail_Address: probinson@theatlgrp.com
Hours_of_Service: 8 to 5
Browse_Graphic:
Browse_Graphic_File_Name:
https://coast.noaa.gov/htdata/lidar2_z/geoid12b/data/6350/supplemental/la2012_usace_new_orleans_m6350.kmz
Browse_Graphic_File_Description:
This graphic shows the lidar footprint for the 2012 USACE HSDRRS New Orleans project area.
Browse_Graphic_File_Type: kmz
Data_Set_Credit: Paul Weyant, Patrick Robinson, Josh Hester
Security_Information:
Security_Classification_System: N/A
Security_Classification: Unclassified
Security_Handling_Description: Nothing Specified
Native_Data_Set_Environment:
ArcMAP V.10.1 ; LP360 V.2011.1.54.1 ; Microstation V8 ; ALTMnav ; Dashmap ;
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
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.
Logical_Consistency_Report:
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.
Completeness_Report:
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.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
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:
Vertical_Positional_Accuracy_Report:
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.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: The Atlantic Group
Publication_Date: Unpublished material
Title:
LiDAR Acquisition for the Hurricane and Storm Damage Risk Reduction System
Geospatial_Data_Presentation_Form: remote-sensing image
Type_of_Source_Media: digital tape media
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20120304
Ending_Date: 20120325
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: HSDRRS
Source_Contribution: Lidar
Process_Step:
Process_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: 2012
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: The Atlantic Group
Contact_Person: Patrick Robinson
Contact_Position: LiDAR Manager
Contact_Address:
Address_Type: mailing and physical
Address: 2223 Drake Ave. SW
City: Huntsville
State_or_Province: AL
Postal_Code: 35805
Country: United States
Contact_Voice_Telephone: 256-971-9991
Contact_Electronic_Mail_Address: perobinson@theatlgrp.com
Hours_of_Service: 8 to 5
Process_Step:
Process_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: 2012
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: The Atlantic Group
Contact_Person: Patrick Robinson
Contact_Position: LiDAR Manager
Contact_Address:
Address_Type: mailing and physical
Address: 2223 Drake ave. SW
City: Huntsville
State_or_Province: AL
Postal_Code: 35805
Country: United States
Contact_Voice_Telephone: 256-971-9991
Contact_Electronic_Mail_Address: perobinson@theatlgrp.com
Hours_of_Service: 8 to 5
Process_Step:
Process_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: 2012
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: The Atlantic Group
Contact_Person: Patrick Robinson
Contact_Position: LiDAR Manager
Contact_Address:
Address_Type: mailing and physical
Address: 2223 Drake Ave. SW
City: Huntsville
State_or_Province: AL
Postal_Code: 35805
Country: United States
Contact_Voice_Telephone: 256-971-9991
Contact_Electronic_Mail_Address: perobinson@theatlgrp.com
Hours_of_Service: 8 to 5
Process_Step:
Process_Description:
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.
Process_Date: 20120420
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Atlantic Group, LLC
Contact_Person: Paul Weyant
Contact_Position: Production Manager
Contact_Address:
Address_Type: mailing and physical
Address: 2223 Drake Ave.
City: Huntsville
State_or_Province: AL
Postal_Code: 35805
Country: USA
Contact_Voice_Telephone: 257-971-9991
Contact_Electronic_Mail_Address: prweyant@theatlgrp.com
Process_Step:
Process_Description:
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 performed the following operations for Digital Coast storage and provisioning purposes: 1. Converted the files from vertical units of feet to meters using gdal_translate 2. Copied the raster files to database and https
Process_Date: 20170727
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Office for Coastal Management (OCM)
Contact_Address:
Address_Type: mailing and physical
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: SC
Postal_Code: 29405-2413
Country: US
Contact_Voice_Telephone: 843-740-1202
Contact_Electronic_Mail_Address: coastal.info@noaa.gov
Cloud_Cover: 0
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Raster
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 1702
Lambert_Conformal_Conic:
Standard_Parallel: 29.3
Standard_Parallel: 30.7
Longitude_of_Central_Meridian: -91.33333333333333
Latitude_of_Projection_Origin: 28.5
False_Easting: 3280833.333333333
False_Northing: 0.0
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 500000
Ordinate_Resolution: 0.3048006096012192
Planar_Distance_Units: survey feet
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.3048006096012192
Altitude_Distance_Units: meters
Altitude_Encoding_Method:
Explicit elevation coordinate included with horizontal coordinates
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Office for Coastal Management (OCM)
Contact_Address:
Address_Type: mailing and physical
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: SC
Postal_Code: 29405-2413
Country: US
Contact_Voice_Telephone: 843-740-1202
Contact_Electronic_Mail_Address: coastal.info@noaa.gov
Resource_Description: Downloadable Data
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.
Custom_Order_Process:
This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=6352
Metadata_Reference_Information:
Metadata_Date: 20170825
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NOAA Office for Coastal Management (OCM)
Contact_Address:
Address_Type: mailing and physical
Address: 2234 South Hobson Avenue
City: Charleston
State_or_Province: SC
Postal_Code: 29405-2413
Country: US
Contact_Voice_Telephone: 843-740-1202
Contact_Electronic_Mail_Address: coastal.info@noaa.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Generated by mp version 2.9.32 on Fri Aug 25 13:15:56 2017