Make A Graph

Dataset Title:	CalCOFI NOAA Cruises
Institution:	NOAA SWFSC (Dataset ID: erdCalCOFIcruises)
Information:	Summary \| License \| Metadata \| Background \| Subset \| Data Access Form \| Files

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Graph Type:

X Axis:

Y Axis:

Color:

Constraints

Optional
Constraint #1

Optional
Constraint #2

Server-side Functions

distinct()

Hover here to see a list of options. Click on an option to select it.

Graph Settings

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(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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[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 {
 s {
  cruise {
    String description "Six-digit cruise code (YYYYMM)";
    String ioos_category "Identifier";
    String long_name "Cruise";
  }
  ship {
    String description "Ship name";
    String ioos_category "Identifier";
    String long_name "Ship Name";
  }
  ship_code {
    String description "Two-digit CalCOFI ship code";
    String ioos_category "Identifier";
    String long_name "Ship Code";
  }
  year {
    Int32 actual_range 1951, 2023;
    String description "Year in which cruise began";
    String ioos_category "Time";
    String long_name "Year";
  }
  month {
    Int32 actual_range 1, 12;
    String description "Month in which cruise primarily occured";
    String ioos_category "Time";
    String long_name "Month";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3, NCCSV-1.2";
    String history 
"2024-04-19T09:48:36Z (local files)
2024-04-19T09:48:36Z http://coastwatch.pfeg.noaa.gov/tabledap/erdCalCOFIcruises.das";
    String infoUrl "https://oceanview.pfeg.noaa.gov/CalCOFI/calcofi_info.html";
    String institution "NOAA SWFSC";
    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 publisher_email "ed.weber@noaa.gov";
    String publisher_name "Ed Weber";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF-12";
    String subsetVariables "cruise,ship,ship_code,year,month";
    String summary "Cruises using one or more ships conducted as part of the California Cooperative Oceanic Fisheries Investigations (CalCOFI) program and other related cruises conducted by the NOAA Southwest Fisheries Science Center from 1951 to present.";
    String title "CalCOFI NOAA Cruises";
  }
}

Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its selection 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 or Subset form. They make 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.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.

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