Data Access Form

Dataset Title:	Atka, Alaska Coastal Digital Elevation Model (atka 1 mhw 2010), 2.7777778E-4°
Institution:	DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA; publisher; NOAA NGDC, NESDIS, NOAA; Boulder; Colorado; publisher; NOAA NGDC, NESDIS, NOAA; originator; Citation URL; https://www.ngdc.noaa.gov/dem/squareCellGrid/download/252; Atka, AK 1 arc-second Tsunami Inundation DEM; Download page for accessing DEM, metadata record and development report.; download; Citation URL; https://www.ngdc.noaa.gov/mgg/inundation/tsunami/inundation.html; NOAA Tsunami Inundation Gridding Project; Project web page.; information (Dataset ID: noaa_ngdc_2c96_ed60_53cf)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing
latitude (degrees_north)	3241	2.777778E-4 (even)

longitude (degrees_east)	10369	2.777778E-4 (even)

Grid Variables (which always also download all of the dimension variables)

Band1 (GDAL Band Number 1, meters)

File type: (more information)

(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 51.59, 52.4900000072;
    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 -175.78, -172.89999997696;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Band1 {
    Float32 _FillValue -99999.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "GDAL Band Number 1";
    String positive "up";
    String units "meters";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String comment "Developed for the Pacific Marine Environmental Laboratory (PMEL), NOAA Center for Tsunami Research program in support of NOAA's tsunami forecasting and warning efforts.";
    String Conventions "ACDD 1.3, CF-1.6, COARDS";
    String creator_email "dem.info@noaa.gov";
    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; https://www.ngdc.noaa.gov/dem/squareCellGrid/download/252; Atka, AK 1 arc-second Tsunami Inundation DEM; Download page for accessing DEM, metadata record and development report.; download; Citation URL; https://www.ngdc.noaa.gov/mgg/inundation/tsunami/inundation.html; NOAA Tsunami Inundation Gridding Project; Project web page.; information";
    String creator_name "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; https://www.ngdc.noaa.gov/dem/squareCellGrid/download/252; Atka, AK 1 arc-second Tsunami Inundation DEM; Download page for accessing DEM, metadata record and development report.; download; Citation URL; https://www.ngdc.noaa.gov/mgg/inundation/tsunami/inundation.html; NOAA Tsunami Inundation Gridding Project; Project web page.; information";
    String creator_type "group";
    String creator_url "https://www.ngdc.noaa.gov/mgg/dem";
    String date_issued "2010-03-31";
    String date_metadata_modified "2016-07-28";
    Float64 Easternmost_Easting -172.89999997696;
    String GDAL "GDAL 1.11.4, released 2016/01/25";
    String GDAL_AREA_OR_POINT "Point";
    String geospatial_bounds_crs "World Geodetic System 1984";
    String geospatial_bounds_vertical_crs "Mean High Water height";
    Float64 geospatial_lat_max 52.4900000072;
    Float64 geospatial_lat_min 51.59;
    Float64 geospatial_lat_resolution 2.7777777999999975e-4;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -172.89999997696;
    Float64 geospatial_lon_min -175.78;
    Float64 geospatial_lon_resolution 2.7777777999999975e-4;
    String geospatial_lon_units "degrees_east";
    String GMT_version "4.5.13 [64-bit]";
    String grid_mapping_GeoTransform "-175.78013888889 0.00027777778 0 52.49013889609 0 -0.00027777778";
    Float64 grid_mapping_inverse_flattening 298.257223563;
    Float64 grid_mapping_longitude_of_prime_meridian 0.0;
    String grid_mapping_name "latitude_longitude";
    Float64 grid_mapping_semi_major_axis 6378137.0;
    String grid_mapping_spatial_ref "GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0],UNIT[\"degree\",0.0174532925199433],AUTHORITY[\"EPSG\",\"4326\"]]";
    String history 
"Tue Jul 26 17:34:53 2016: GDAL CreateCopy( /nfs/metadata_working/DEM/atka_ak.nc, ... )
2024-11-21T15:20:34Z https://www.ngdc.noaa.gov/thredds/dodsC/regional/atka_1_mhw_2010.nc
2024-11-21T15:20:34Z http://upwell.pfeg.noaa.gov/erddap/griddap/noaa_ngdc_2c96_ed60_53cf.das";
    String id "regionalDatasetScan/atka_1_mhw_2010.nc";
    String infoUrl "https://www.ngdc.noaa.gov/mgg/coastal/coastal.html";
    String institution "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA; publisher; NOAA NGDC, NESDIS, NOAA; Boulder; Colorado; publisher; NOAA NGDC, NESDIS, NOAA; originator; Citation URL; https://www.ngdc.noaa.gov/dem/squareCellGrid/download/252; Atka, AK 1 arc-second Tsunami Inundation DEM; Download page for accessing DEM, metadata record and development report.; download; Citation URL; https://www.ngdc.noaa.gov/mgg/inundation/tsunami/inundation.html; NOAA Tsunami Inundation Gridding Project; Project web page.; information";
    String keywords "accessing, alaska, arc, arc-second, arctic, atka, band, Band1, bathymetry, bathymetry/seafloor, boulder, center, centers, citation, coastal, coastal relief, colorado, commerce, data, dem, DEM > Digital Elevation Model, department, depth, development, digital, doc, download, 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, environmental, gdal, geophysical, gridded elevations, gridding, h: 1 meter - < 30 meters, information, integrated bathymetry and topography, inundation, inundation.html, land, latitude, longitude, maps, metadata, mgg, mhw, model, national, ncei, nesdis, ngdc, noaa, number, ocean, oceans, originator, page, page., processes, project, publisher, record, relief, report., satellite, science, sciences, seafloor, second, service, squarecellgrid, statistics, surface, terrain, topographical, topography, tsunami, v: < 1 meter, water, web, www.ngdc.noaa.gov";
    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 52.4900000072;
    String product_version "First";
    String project "ICSU-WDS > International Council for Science - World Data System";
    String publisher_email "dem.info@noaa.gov";
    String publisher_name "NOAA National Center for Environmental Information";
    String publisher_type "institution";
    String publisher_url "https://www.ngdc.noaa.gov/mgg/dem";
    String references "Digital Elevation Model of Atka, Alaska: Procedures, Data Sources, and Analysis";
    String source "NOS Hydrographic Surveys; NGDC Multibeam Bathymetry Database; NGDC Marine Geophysical Trackline Database; Shuttle Radar Topography Mission (SRTM)";
    String sourceUrl "https://www.ngdc.noaa.gov/thredds/dodsC/regional/atka_1_mhw_2010.nc";
    Float64 Southernmost_Northing 51.59;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Atka, Alaska Coastal Digital Elevation Model. National Centers for Environmental Information (NCEI) builds and distributes high-resolution, coastal digital elevation models (DEMs) that integrate ocean bathymetry and land topography to support NOAA's mission to understand and predict changes in Earth's environment, and conserve and manage coastal and marine resources to meet our Nation's economic, social, and environmental needs. DEMs are used for coastal process modeling (tsunami inundation, storm surge, sea-level rise, contaminant dispersal, etc.), ecosystems management and habitat research, coastal and marine spatial planning, and hazard mitigation and community preparedness.";
    String title "Atka, Alaska Coastal Digital Elevation Model (atka 1 mhw 2010), 2.7777778E-4°";
    Float64 Westernmost_Easting -175.78;
  }
}

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.

(easy) You can get data by using the dataset's Data Access Form. It makes the URL for you.
(easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
(not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

griddap request URLs must be in the form
https://upwell.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://upwell.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(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.