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Dataset Title:  Northern Gulf Coast Digital Elevation Model (Regional, northern gulf 1 mhw
2010), 2.7777778E-4°
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Institution:  NOAA   (Dataset ID: noaa_ngdc_522b_2589_3862)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Make a graph
Dimensions ? Start ? Stride ? Stop ?  Size ?    Spacing ?
 latitude (degrees_north) ?      9901    2.777778E-4 (even)
  < slider >
 longitude (degrees_east) ?      20701    2.777778E-4 (even)
  < slider >
Grid Variables (which always also download all of the dimension variables)
 z (meters) ?

File type: (more info)

(Documentation / Bypass this form) ?
(Please be patient. It may take a while to get the data.)


The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 28.499999999999996, 31.249999999999996;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -90.75, -85.0;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  z {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "Topography";
    String grid_mapping "crs";
    String ioos_category "Bathymetry";
    String long_name "z";
    String positive "up";
    String units "meters";
    String cdm_data_type "Grid";
    String comment "Developed for the Office of Coast Survey (OCS), NOAA Coastal Survey Development Laboratory (CSDL) in support of NOAA's Vertical Datum Transformation tool (VDatum).";
    String Conventions "ACDD 1.3, CF-1.6, COARDS";
    String creator_email "";
    String creator_institution "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce; publisher; DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce; Boulder; Colorado; publisher; DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce; originator; Citation URL;; Northern Gulf Coast 1 arc-second MHW DEM; Download page for accessing DEM, metadata record and development report.; download; Citation URL;; NOAA VDatum DEM Project; Project web page.; information";
    String creator_name "National Centers for Environmental Information";
    String creator_type "group";
    String creator_url "";
    String date_issued "2010-12-30";
    String date_metadata_modified "2016-07-28";
    Float64 Easternmost_Easting -85.0;
    String GDAL "GDAL 1.11.4, released 2016/01/25";
    String GDAL_AREA_OR_POINT "Area";
    String geospatial_bounds_vertical_crs "Mean High Water height";
    Float64 geospatial_lat_max 31.249999999999996;
    Float64 geospatial_lat_min 28.499999999999996;
    Float64 geospatial_lat_resolution 2.777777777777778e-4;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -85.0;
    Float64 geospatial_lon_min -90.75;
    Float64 geospatial_lon_resolution 2.777777777777778e-4;
    String geospatial_lon_units "degrees_east";
    String GMT_version "4.5.13 [64-bit]";
    String history 
"Tue Jul 26 17:37:14 2016: GDAL CreateCopy( /nfs/metadata_working/DEM/, ... )
grdmath ngc.grd /nfs/mgg_vdatum/data/ascii_xyz/conversion_grid/gom_crm/navd2mhw/gom_mhw.grd ADD = ngc_mhw.grd
    String id "";
    String infoUrl "";
    String institution "NOAA";
    String keywords "bathymetry, bathymetry/seafloor, center, coast, coastal, coastal relief, data, dem, DEM > Digital Elevation Model, depth, digital, earth, Earth Science > Land Surface > Topography > Terrain Elevation, Earth Science > Land Surface > Topography > Topographical Relief Maps, Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry, Earth Science > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography, Earth Science > Oceans > Bathymetry/Seafloor Topography > Water Depth, Earth Science > Oceans > Coastal Processes > Coastal Elevation, elevation, geophysical, gom, gridded elevations, gulf, h: 1 meter - < 30 meters, integrated bathymetry and topography, land, latitude, longitude, maps, mexico, mhw, model, national, ncei, nesdis, ngdc, noaa, northern, ocean, oceans, processes, regional, relief, science, seafloor, surface, terrain, topographical, topography, v: < 1 meter, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "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.";
    String naming_authority "gov.noaa.ngdc.mgg.dem";
    Int32 node_offset 1;
    Float64 Northernmost_Northing 31.249999999999996;
    String product_version "First";
    String project "ICSU-WDS > International Council for Science - World Data System";
    String publisher_email "";
    String publisher_name "National Centers for Environmental Information";
    String publisher_type "institution";
    String publisher_url "";
    String references "Digital Elevation Models of the Northern Gulf Coast: Procedures, Data Sources, and Analysis";
    String source "NOS Hydrographic Surveys; ENC Digital Hydrographic Charts; USGS National Elevation Dataset; FDEM contoured lidar; Digital Elevation Models of Mobile, AL; Digital Elevation Models of New Orleans, LA; Digital Elevation Models of Panama City, FL; Digital Elevation Models of Biloxi, MS; Digital Elevation Models of Southern Louisiana";
    String sourceUrl "";
    Float64 Southernmost_Northing 28.499999999999996;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Northern Gulf Coast Digital Elevation Model. 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 (MHW), 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 (";
    String title "Northern Gulf Coast Digital Elevation Model (Regional, northern gulf 1 mhw 2010), 2.7777778E-4°";
    Float64 Westernmost_Easting -90.75;


Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link) Data Access Protocol (DAP) (external link) and its projection constraints (external link).

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

griddap request URLs must be in the form{?query}
For example,[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.

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