Make A Graph

Dataset Title:	ETOPO_2022_v1_15s
Institution:	National Centers for Environmental Information (Dataset ID: ETOPO_2022_v1_15s)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

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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:
(Documentation / Bypass this form

)

Click on the map to specify a new center point.

Zoom:

[The graph you specified. Please be patient.]

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 -89.99791666666667, 89.99791666666667;
    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 -179.99791666666667, 179.99791666666667;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  z {
    String ioos_category "Location";
    String long_name "Z";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.10, COARDS, ACDD-1.3";
    String creator_email "dem.info@noaa.gov";
    String creator_name "National Centers for Environmental Information";
    String creator_type "Institution";
    String creator_url "https://www.ngdc.noaa.gov/mgg/bathymetry/relief.html";
    String defaultGraphQuery "z[(20.0):(60.0)][(-145.0):(-105.0)]&.draw=surface&.vars=longitude|latitude|z&.colorBar=|||-5000|5000|&.bgColor=0xffccccff";
    Float64 Easternmost_Easting 179.99791666666667;
    String GDAL "GDAL 3.3.2, released 2021/09/01";
    String GDAL_AREA_OR_POINT "Area";
    String GDAL_TIFFTAG_COPYRIGHT "DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce";
    String GDAL_TIFFTAG_IMAGEDESCRIPTION "Topography; EGM2008 height";
    Float64 geospatial_lat_max 89.99791666666667;
    Float64 geospatial_lat_min -89.99791666666667;
    Float64 geospatial_lat_resolution 0.004166666666666667;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.99791666666667;
    Float64 geospatial_lon_min -179.99791666666667;
    Float64 geospatial_lon_resolution 0.004166666666666667;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-05-01T03:26:10Z (local files)
2024-05-01T03:26:10Z http://coastwatch.pfeg.noaa.gov/griddap/ETOPO_2022_v1_15s.das";
    String infoUrl "https://www.ngdc.noaa.gov/mgg/bathymetry/relief.html";
    String institution "National Centers for Environmental Information";
    String keywords "data, local, source";
    String license 
"The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, 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 NCO "netCDF Operators version 4.9.1 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    Float64 node_offset 1;
    Float64 Northernmost_Northing 89.99791666666667;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.99791666666667;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "ETOPO 2022 is a 15 arc-second global relief model of Earth's surface that integrates land topography and ocean bathymetry. It was built from numerous global and regional data sets, and is available in \"Ice Surface\" (top of Antarctic and Greenland ice sheets) and \"Bedrock\" (base of the ice sheets) versions.";
    String title "ETOPO_2022_v1_15s";
    Float64 Westernmost_Easting -179.99791666666667;
  }
}

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.