49431 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. 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 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 No 2022-03-16 1 Year 2023-03-16