Make A Graph

Dataset Title:	NOAA/NCEI 180-m Bathymetry: Mariana Trench
Institution:	NOAA National Centers for Environmental Information (NCEI) (Dataset ID: ngdc_bathy_180m_mariana)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form

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Graph Type:
X Axis:
Y Axis:
Color:

Dimensions

Start

Stop

latitude (degrees_north)

longitude (degrees_east)

Graph Settings
Color Bar:	Continuity:	Scale:
Minimum:	Maximum:	N Sections:
Draw land mask:
Y Axis Minimum:	Maximum:

(Please be patient. It may take a while to get the data.)

Optional:
Then set the File Type: (File Type information)
and

or view the URL:
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Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 10.000003333333332, 21.998336666666667;
    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 139.00000333333332, 149.99833666666666;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  elev {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 0.0;
    Float64 colorBarMinimum -10955.0;
    String ioos_category "Bathymetry";
    String long_name "elevation";
    String positive "up";
    String standard_name "height";
    String units "meters";
  }
  NC_GLOBAL {
    String acknowledgement "The Pacific Islands Ocean Observing System (PacIOOS) is funded through the National Oceanic and Atmospheric Administration (NOAA) as a Regional Association within the U.S. Integrated Ocean Observing System (IOOS). PacIOOS is coordinated by the University of Hawaii School of Ocean and Earth Science and Technology (SOEST).";
    String cdm_data_type "Grid";
    String comment "These data are provided by NOAA National Centers for Environmental Information (NCEI) and are distributed via THREDDS Data Server (TDS) and ERDDAP by PacIOOS.";
    String Conventions "CF-1.6, ACDD-1.3";
    String creator_email "ncei.info@noaa.gov";
    String creator_institution "NOAA National Centers for Environmental Information (NCEI)";
    String creator_name "NOAA National Centers for Environmental Information (NCEI)";
    String creator_type "institution";
    String creator_url "https://www.ncei.noaa.gov";
    String date_created "2012-06-18";
    String date_issued "2015-07-30";
    String date_metadata_modified "2023-01-20";
    String date_modified "2012-06-18";
    String drawLandMask "off";
    Float64 Easternmost_Easting 149.99833666666666;
    String geospatial_bounds "POLYGON ((10.0000 139.0000, 21.9983 139.0000, 21.9983 149.9983, 10.0000 149.9983, 10.0000 139.0000))";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 21.998336666666667;
    Float64 geospatial_lat_min 10.000003333333332;
    Float64 geospatial_lat_resolution 0.0016666666666666668;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 149.99833666666666;
    Float64 geospatial_lon_min 139.00000333333332;
    Float64 geospatial_lon_resolution 0.001666666666666667;
    String geospatial_lon_units "degrees_east";
    String history 
"2015-07-30T00:00:00Z PacIOOS converted to NetCDF to provide OPeNDAP, OGC, and related data services.
2024-05-19T01:10:33Z https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/ngdc_bathy_180m_mariana
2024-05-19T01:10:33Z https://pae-paha.pacioos.hawaii.edu/griddap/ngdc_bathy_180m_mariana.das";
    String id "ngdc_bathy_180m_mariana";
    String infoUrl "https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.dem:4870/html";
    String institution "NOAA National Centers for Environmental Information (NCEI)";
    String instrument "In Situ/Laboratory Instruments > Profilers/Sounders > Acoustic Sounders > Sonar";
    String instrument_vocabulary "GCMD Instrument Keywords";
    String ISO_Topic_Categories "elevation, oceans";
    String keywords "Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "The data may be used and redistributed for free but is not intended for navigational or legal use, since it may contain inaccuracies. Neither the data Contributor, University of Hawaii, PacIOOS, NOAA, State of Hawaii nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.";
    String locations "Ocean > Pacific Ocean > Western Pacific Ocean > Micronesia > Guam, Ocean > Pacific Ocean > Western Pacific Ocean > Micronesia > Northern Mariana Islands > Commonwealth of the Northern Mariana Islands (CNMI), Ocean > Pacific Ocean > Western Pacific Ocean > Micronesia > Northern Mariana Islands > Mariana Trench";
    String locations_vocabulary "GCMD Location Keywords";
    String metadata_link "https://www.pacioos.hawaii.edu/metadata/ngdc_bathy_180m_mariana.html";
    String naming_authority "org.pacioos";
    Float64 Northernmost_Northing 21.998336666666667;
    String platform "In Situ Ocean-based Platforms > Ships, Models/Analyses > > DEM > Digital Elevation Model";
    String platform_vocabulary "GCMD Platform Keywords";
    String program "Pacific Islands Ocean Observing System (PacIOOS)";
    String project "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_email "info@pacioos.org";
    String publisher_institution "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_name "Pacific Islands Ocean Observing System (PacIOOS)";
    String publisher_type "institution";
    String publisher_url "http://www.pacioos.hawaii.edu";
    String references "https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.dem:4870/html; https://www.pacioos.hawaii.edu/metadata/mp_ngdc_all_bathy180m_hillshade.html; Related publication: Lim, E., M.G. Sutherland, D.Z. Friday, B.W. Eakins, and S.J. McLean. 2013. Bathymetric Digital Elevation Model of the Mariana Trench. NOAA National Centers for Environmental Information (NCEI) Technical Report, Dept. of Commerce, Boulder, CO, 4 pp. https://www.ngdc.noaa.gov/mgg/dat/dems/regional_tr/mariana_trench_6_msl_2012.pdf.";
    String source "multibeam sonar";
    String sourceUrl "https://pae-paha.pacioos.hawaii.edu/thredds/dodsC/ngdc_bathy_180m_mariana";
    Float64 Southernmost_Northing 10.000003333333332;
    String standard_name_vocabulary "CF Standard Name Table v39";
    String summary "A 180-m (6 arc-second) resolution gridded digital elevation model (DEM) for the bathymetry (ocean depth) of the Western Pacific Ocean surrounding the Mariana Trench, the deepest part of the Earth's oceans. The extent of the DEM encompasses not only the Mariana Trench, but also the West Mariana Ridge and the East Mariana Ridge, the island of Guam, and the Commonwealth of the Northern Mariana Islands (CNMI). It was compiled by the NOAA National Centers for Environmental Information (NCEI), formerly the National Geophysical Data Center (NGDC), from various data sources including international, federal, and academic partners. Not to be used for navigational purposes. For a grayscale hillshade image layer of this dataset, see \"mp_ngdc_all_bathy180m_hillshade\" in the distribution links listed in the metadata. For further details about this dataset, please see: https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.dem:4870/html.";
    String time_coverage_duration "P0D";
    String time_coverage_resolution "P0D";
    String title "NOAA/NCEI 180-m Bathymetry: Mariana Trench";
    Float64 Westernmost_Easting 139.00000333333332;
  }
}

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://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.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.