Make A Graph

Dataset Title:	Topography, Smith & Sandwell v11.1, 1/60-degree
Institution:	UCSD (Dataset ID: usgsCeSS111)
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:
(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";
    Float32 actual_range -80.738, 80.738;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.9917, 179.9917;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  topo {
    Int16 _FillValue 32767;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "Topography";
    String ioos_category "Location";
    String long_name "Topography";
    String standard_name "altitude";
    String units "meters";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "jjbecker@ucsd.edu, dsandwell@ucsd.edu";
    Float64 Easternmost_Easting 179.9917;
    Float64 geospatial_lat_max 80.738;
    Float64 geospatial_lat_min -80.738;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.9917;
    Float64 geospatial_lon_min -179.9917;
    Float64 geospatial_lon_resolution 0.016666669753229318;
    String geospatial_lon_units "degrees_east";
    String history 
"28-Apr-2008: Converted to NetCDF using gdal_translate from FWTOOLS, then rearranged from 0:360 to -180:180 using Matlab (Rich Signell: rsignell@usgs.gov)
2024-10-05T19:43:15Z https://geoport.whoi.edu/thredds/dodsC/bathy/smith_sandwell_v11
2024-10-05T19:43:15Z https://pae-paha.pacioos.hawaii.edu/griddap/usgsCeSS111.das";
    String infoUrl "https://topex.ucsd.edu/marine_topo/mar_topo.html";
    String institution "UCSD";
    String keywords "altitude, arc, atmosphere, Earth Science > Oceans > Bathymetry/Seafloor Topography > Bathymetry, global, height, scripps, second, srtm30+, station, topography, version";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "David T. Sandwell, Walter H. F. Smith, and Joseph J. Becker Copyright 2008. The Regents of the University of California. All Rights Reserved. Permission to copy, modify and distribute any part of this gridded bathymetry at 30 second resolution for educational, research and non-profit purposes, without fee, and without a written agreement is hereby granted, provided that the above copyright notice, this paragraph and the following three paragraphs appear in all copies. Those desiring to incorporate this global bathymetry into commercial products or use for commercial purposes should contact the Technology Transfer and Intellectual Property Services, University of California, San Diego, 9500 Gilman Drive, Mail Code 0910, La Jolla, CA 92093-0910, Ph: (858) 534-5815, FAX: (858) 534-7345, E-MAIL:invent@ucsd.edu. IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF THIS global bathymetry, EVEN IF THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. THE global bathymetry PROVIDED HEREIN IS ON AN \"AS IS\" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. THE UNIVERSITY OF CALIFORNIA MAKES NO REPRESENTATIONS AND EXTENDS NO WARRANTIES OF ANY KIND, EITHER IMPLIED OR EXPRESS, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR THAT THE USE OF THE global bathymetry WILL NOT INFRINGE ANY PATENT, TRADEMARK OR OTHER RIGHTS.";
    String naming_authority "gov.noaa.pfeg.coastwatch";
    Float64 Northernmost_Northing 80.738;
    String references "Smith, W. H. F. and D. Sandwell, Global seafloor topography from satellite altimetry and ship depth soundings, Science, 277, p.1956-1962, 1997.";
    String sourceUrl "https://geoport.whoi.edu/thredds/dodsC/bathy/smith_sandwell_v11";
    Float64 Southernmost_Northing -80.738;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Global seafloor topography from satellite altimetry and ship depth soundings.";
    String title "Topography, Smith & Sandwell v11.1, 1/60-degree";
    Float64 Westernmost_Easting -179.9917;
  }
}

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.