NCEI (formerly NGDC)
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Northern Gulf 1 Arc-second NAVD 88 Coast Digital Elevation Model

browse graphicPerspective view of 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), Mean High Water (MHW) or Mean Lower Low Water (MLLW) 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.
Search Data
  • DEM text search tool (search)
    Text search tool for locating completed and planned DEMs.
  • Map Interface (search)
    Graphic geo-spatial search tool for locating completed and planned DEMs.
Download Data
Distribution Formats
  • ESRI Arc ASCII (Version: 1)
    • File Specification: ASCII text version of ESRI ArcGIS raster format
    • File Compression: ZIP
  • netCDF (Version: 3.6.2)
    • File Compression: ZIP
  • 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
General Documentation
Associated Resources
Date(s)
  • publication: 2010-12-31
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.
  • While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.
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
Time Period: 1873-01-01 to 2003-01-01
Spatial Reference System: urn:ogc:def:crs:EPSG::4269
Spatial Bounding Box Coordinates:
N: 31.25
S: 28.5
E: -85.0
W: -90.75
Spatial Coverage Map:
Theme keywords Global Change Master Directory (GCMD) Science and Services 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 > Topographical Relief Maps
  • Earth Science > Oceans > Coastal Processes > Coastal Elevation
Uncontrolled
  • Coastal Relief
  • Gridded elevations
  • Integrated bathymetry and topography
Global Change Master Directory (GCMD) Science and Services 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) Science and Services 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) Science and Services 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
  • DEM > Digital Elevation Model
Place keywords Global Change Master Directory (GCMD) Location Keywords
  • Continent > North America > United States of America > Louisiana
  • Ocean > 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
Data Resolution keywords Global Change Master Directory (GCMD) Horizontal Data Resolution Keywords
  • H: 1 meter - < 30 meters
Global Change Master Directory (GCMD) Vertical Data Resolution Keywords
  • V: < 1 meter
Use Constraints No constraint information available
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
  • 2010-08-28T00:00:00 - All datasets obtained by NGDC were converted to common horizontal and vertical datums of NAD 83 geographic and NAVD 88, respectively, using Proj4 and VDatum transformation tool. They were also converted to common file format, ESRI point shapefiles, for visualization and inspection.
  • 2010-09-10T00:00:00 - Datasets were visually inspected for identification and editing of data anomalies. Datasets were then compared with overlapping datasets to ensure data consistency.
  • 2010-10-24T00:00:00 - Coastline datasets were merged and adjusted to fit satellite imagery.
  • 2010-11-14T00:00:00 - xyz files of the bathymetric data were surfaced using GMT's 'surface' tool onto a 1 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.
  • 2010-11-23T00:00:00 - 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.
  • 2010-11-17T00:00:00 - 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.
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: 1873-01-01 to 2003-01-01
  • ENC Digital Hydrographic Charts
    • OCS ENC electronic navigational charts (download)
      Digital hydrographic elevation data
    • Description of Source: Source Contribution: Hydrographic surveys provided to NGDC by CSDL ; Source Type: digital files via FTP
    • Temporal extent used: 1873-01-01 to 2003-01-01
  • USGS National Elevation Dataset
    • USGS 1 Arc-Second NED (download)
      Topographic elevation dataset
    • Description of Source: Source Contribution: coastal lidar ; Source Type: online
    • Temporal extent used: Unknown to
  • FDEM contoured lidar
    • FDEM contoured lidar (download)
      FDEM topographic lidar contours
    • Description of Source: Source Contribution: Digital 2 foot contours; Source Type: online
    • Temporal extent used: Unknown to
  • Digital Elevation Models of Mobile, AL
    • Digital Elevation Models of Mobile, AL (download)
      NGDC, an office of NOAA, developed two bathymetric-topographic DEMs of Mobile, AL. The DEMs were developed for NOAA's CSDL through the ARRA of 2009 to evaluate the utility of VDatum, developed jointly by NOAA's OCS, NGS, and CO-OPS (http://vdatum.noaa.gov/).
    • Description of Source: Source Contribution: Digital Elevation Model ; Source Type: online
    • Temporal extent used: 2009-01-01 to 2009-01-01
  • Digital Elevation Models of New Orleans, LA
    • Digital Elevation Models of New Orleans, LA (download)
      NGDC, an office of NOAA, developed three bathymetric-topographic DEMs of New Orleans, LA. The DEMs were developed for NOAA's CSDL through the ARRA of 2009 to evaluate the utility of VDatum, developed jointly by NOAA's OCS, NGS, and CO-OPS (http://vdatum.noaa.gov/).
    • Description of Source: Source Contribution: Digital Elevation Model ; Source Type: online
    • Temporal extent used: 2009-01-01 to 2010-01-01
  • Digital Elevation Models of Panama City, FL
    • Digital Elevation Models of Panama City, FL (download)
      NGDC, an office of NOAA, developed three bathymetric-topographic DEMs of Panama City, FL. The DEMs were developed for NOAA's CSDL through the ARRA of 2009 to evaluate the utility of VDatum, developed jointly by NOAA's OCS, NGS, and CO-OPS (http://vdatum.noaa.gov/).
    • Description of Source: Source Contribution: Digital Elevation Model ; Source Type: online
    • Temporal extent used: 2010-01-01 to 2010-01-01
  • Digital Elevation Models of Biloxi, MS
    • Digital Elevation Models of Biloxi, MS (download)
      In March 2007, NGDC, an office of NOAA, developed a bathymetric-topographic DEM centererd on Biloxi, Mississippi for the Pacific Marine Environmental Laboratory (PMEL) NOAA Center for Tsunami Research (http://nctr.pmel.noaa.gov/).
    • Description of Source: Source Contribution: Digital Elevation Model ; Source Type: online
    • Temporal extent used: 2007-01-01 to 2007-01-01
  • Digital Elevation Models of Southern Louisiana
    • Digital Elevation Models of Southern Louisiana (download)
      NGDC, an office of NOAA, developed two bathymetric-topographic structured DEMs and two bathymetric-topographic unstructured DEMs of southern Louisiana. The DEMs were developed for the Hurricane Forecast Improvement Project (HFIP), with the purpose of developing a new methodology for building companion structured and unstructured DEMs.
    • Description of Source: Source Contribution: Digital Elevation Model ; Source Type: online
    • Temporal extent used: 2010-01-01 to 2010-01-01
Acquisition Information (collection)
Instrument
Platform
  • Digital Elevation Model
Operation
  • NOAA VDatum DEM Project
Last Modified: 2016-03-11
For questions about the information on this page, please email: dem.info@noaa.gov