NCEI (formerly NGDC)
EMMA logo

New Orleans, Louisiana 1/3 Arc-second MLLW Coastal Digital Elevation Model

browse graphicArcGIS Hillshade DEM
NOAA's National Geophysical Data Center (NGDC) is building high-resolution digital elevation models (DEMs) for select U.S. coastal regions in the Gulf of Mexico. These integrated bathymetric-topographic DEMs were developed for NOAA Coastal Survey Development Laboratory (CSDL) through the American Recovery and Reinvestment Act (ARRA) of 2009 to evaluate the utility of the Vertical Datum Transformation tool (VDatum), developed jointly by NOAA's
Office of Coast Survey (OCS), National Geodetic Survey (NGS), and Center for Operational Oceanographic Products and Services (CO-OPS). Bathymetric, topographic, and shoreline data used in DEM compilation are obtained from various sources, including NGDC, the U.S. Coastal Services Center (CSC), the U.S. Office of Coast Survey (OCS), the U.S. Army Corps of Engineers (USACE), and other federal, state, and local government agencies, academic institutions, and
private companies. DEMs are referenced to the vertical tidal datum of North American Vertical Datum of 1988 (NAVD 88) or Mean High Water (MHW) and horizontal datum of North American Datum of 1983 (NAD 83). Cell size ranges from 1/3 arc-second (~10 meters) to 1 arc-second (~30 meters). The NOAA VDatum DEM Project was funded by the American Recovery and Reinvestment Act (ARRA) of 2009 (http://www.recovery.gov/).
Cite this dataset when used as a source.
  • ID not available.
Search Data
  • DEM text search (search)
    Text search for locating completed and planned DEMs.
  • Bathymetric Data Viewer (search)
    The Bathymetric Data Viewer is an interactive map providing discovery, descriptions, and download capability for bathymetric survey data and digital elevation models archived at NOAA's National Centers for Environmental Information (NCEI).
Download Data
Distribution Formats
  • netCDF (Version: 3.6.2)
    • File Compression: WINZIP
  • netCDF (Version: 4 Classic)
Distributor DEM Information
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
dem.info@noaa.gov
Dataset Point of Contact DEM Information
DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
dem.info@noaa.gov
Time Period: 1888-01-01 to 2009-01-01
Spatial Reference System: urn:ogc:def:crs:EPSG::5866
Spatial Bounding Box Coordinates:
N: 30.5
S: 29.7
E: -89.3
W: -90.65
General Documentation
Associated Resources
  • NOAA VDatum DEM Project
    • Bathymetric Data Viewer (search)
      The Bathymetric Data Viewer is an interactive map providing discovery, descriptions, and download capability for bathymetric survey data and digital elevation models archived at NOAA's National Centers for Environmental Information (NCEI).
  • Digital Elevation Models of New Orleans, LA: Procedures, Data Sources, and Analysis
Date(s)
  • publication: 2010-04-30
Edition: First
Data Presentation Form: mapDigital
Dataset Progress Status Complete
Data Update Frequency: As needed
Purpose: Developed for the Office of Coast Survey (OCS), NOAA Coastal Survey Development Laboratory (CSDL) in support of NOAA's Vertical Datum Transformation tool (VDatum).
Use Limitations
  • Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series.
  • Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States.
Originator(s)
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Publisher(s)
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Theme keywords Global Change Master Directory (GCMD) Science Keywords
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry
  • Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth
  • Earth Science > Land Surface > Topography > Terrain Elevation
  • Earth Science > Land Surface > Topography > Terrain Elevation > Topographical Relief Maps
  • Earth Science > Oceans > Coastal Processes > Coastal Elevation
Uncontrolled
  • Coastal Relief
  • Gridded elevations
  • Integrated bathymetry and topography
Global Change Master Directory (GCMD) Service Keywords
  • DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
  • DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
  • DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
Global Change Master Directory (GCMD) Service Keywords
  • DATA ANALYSIS AND VISUALIZATION > GEOGRAPHIC INFORMATION SYSTEMS > WEB-BASED GEOGRAPHIC INFORMATION SYSTEMS
  • DATA MANAGEMENT/DATA HANDLING > DATA SEARCH AND RETRIEVAL
  • DATA ANALYSIS AND VISUALIZATION > VISUALIZATION/IMAGE PROCESSING
Data Center keywords Global Change Master Directory (GCMD) Data Center Keywords
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
  • DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce
Platform keywords Global Change Master Directory (GCMD) Platform Keywords
  • Models/Analyses > DEM > Digital Elevation Model
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Continent > North America > United States of America > Louisiana
  • Ocean > Atlantic Ocean > North Atlantic Ocean > Gulf of Mexico
  • Vertical Location > Land Surface
  • Vertical Location > Sea Floor
Uncontrolled
  • New Orleans
  • South West Louisiana
Project keywords Global Change Master Directory (GCMD) Project Keywords
  • ICSU-WDS > International Council for Science - World Data System
  • NOAA OneStop Project
Data Resolution keywords Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • 1 meter - < 30 meters
Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
  • < 1 meter
Use Constraints No constraint information available
Access Constraints
  • Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
Fees Fee information not available.
Lineage information for: repository
Processing Steps
  • 2015-04-22T00:00:00 - NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
Lineage information for: dataset
Processor
  • DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
Processing Steps
  • 2009-08-28T00:00:00 - All datasets obtained by NGDC were converted to common horizontal and vertical datums of NAD 83 geographic and NAVD 88, respectively, using FME, Proj4 and VDatum transformation tool. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection.
  • 2009-09-10T00:00:00 - Datasets were visually inspected with ArcGIS for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
  • 2009-10-24T00:00:00 - Coastline datasets were merged and adjusted to fit satellite imagery.
  • 2009-11-14T00:00:00 - xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 1/3 arc-second grid that interpolated to fill empty cells. Points extracted every 10 meters along the coastline were also included to ensure that the bathymetric grid reached zero at the coast. The resulting Arc ASCII grid was clipped to the coastline to remove values over land.
  • 2010-01-23T00:00:00 - xyz files for each input dataset were gridded using MB-System's 'mbgrid' tool, which utilizes a high-tension spline interpolation method to fill grid cells with no input elevation values. Preferential weighting was given to more recent, higher-accuracy datasets. Gridding was performed with a 5% data buffer.
  • 2010-02-10T00:00:00 - The NAVD 88 DEM was quantitatively evaluated by comparing with source datasets and with elevation values extracted from NGS geodetic monuments. It was visually evaluated by converting to UTM-zone coordinates (units of meters horizontally and vertically) and then creating a slope grid to identify gridding artifacts in the DEM.
  • 2010-03-01T00:00:00 - A conversion grid that models the relationship between NAVD 88 and MLLW was created using data points and the VDatum transformation tool. This conversion grid was added to the NAVD 88 DEM to generate the MLLW DEM.
Processing Environment Native Dataset Environment: Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.3000
Source Datasets
  • NOS Hydrographic Surveys
    • CSDL non-superceded NOS Hydrographic Survey Database (download)
      Digital database of non-superceded NOS hydrographic surveys that date back to the late 19th century.
    • Description of Source: Source Contribution: Hydrographic surveys provided to NGDC by CSDL ; Source Type: digital files via FTP
    • Temporal extent used: 1897-01-01 to 2001-01-01
  • Hydrographic Survey in the vicinity of Lake Borgne, Louisiana (2007)
    • Hydrographic Survey in the vicinity of North Lake Borgne, Louisiana (2007) (download)
      These hydrographic data are made available to the public for a wide variety of uses, such as sea-bottom characterization, habitat classification, coastal studies, boundary issues, and tsunami forecasting. These data are not intended to be used for navigation. Nautical charts produced and certified by NOAA should be used for navigation purposes.
    • Description of Source: Source Contribution: Hydrographic surveys of Lake Borgne, LA ; Source Type: online
    • Temporal extent used: 2007-01-01 to 2007-01-01
  • USACE Hydrographic Surveys
    • USACE New Orleans District Hydrographic Surveys (download)
      Digital database of hydrographic surveys in New Orleans District
    • Description of Source: Source Contribution: Hydrographic surveys for New Orleans District ; Source Type: online
    • Temporal extent used: Unknown to
  • Composite Shoreline and associated data of Louisiana State Composite, LA_COMP
    • Composite Shoreline and associated data of Louisiana State Composite, LA_COMP (download)
      The shoreline and associated data are a representation based on an office interpretation of imagery at the time of photographs taken 19780101 to 19860301.
    • Description of Source: Source Contribution: composite shoreline downloaded from web site. ; Source Type: online
    • Temporal extent used: 1978-01-01 to 1986-01-01
  • Mississippi State County Lidar
    • Description of Source: Source Contribution: topographic lidar ; Source Type: digital files
    • Temporal extent used: Unknown to
  • Louisiana State topographic lidar
    • Description of Source: Source Contribution: topographic lidar ; Source Type: online
    • Temporal extent used: Unknown to
Acquisition Information (collection)
Instrument
    Platform
    • Digital Elevation Model
    Operation
    • NOAA VDatum DEM Project
    Last Modified: 2017-11-13
    For questions about the information on this page, please email: dem.info@noaa.gov