Make A Graph

Dataset Title:	* The List of All Active Datasets in this ERDDAP *
Institution:	AKFIN (Dataset ID: allDatasets)
Information:	Summary \| License \| Metadata \| Background \| Subset \| Data Access Form

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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

Marker Type:

Size:

Color:

Color Bar:

Continuity:

Scale:

Minimum:

Maximum:

N Sections:

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

)

[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 {
  datasetID {
    String fileAccessBaseUrl "https://erddap.psmfc.org/erddap/info/";
    String fileAccessSuffix "/index.html";
    String ioos_category "Other";
    String long_name "Dataset ID";
  }
  accessible {
    String comment "Some datasets are public. Some may be private and perhaps not accessible to you.";
    String ioos_category "Other";
    String long_name "Accessible";
  }
  institution {
    String ioos_category "Other";
    String long_name "Institution";
  }
  dataStructure {
    String comment "ERDDAP treats each dataset as either a 'grid' or a 'table' dataset.";
    String ioos_category "Other";
    String long_name "Data Structure";
    String references "https://coastwatch.pfeg.noaa.gov/erddap/download/setupDatasetsXml.html#dataStructures";
  }
  cdm_data_type {
    String ioos_category "Other";
    String long_name "Common Data Model Type";
    String references "https://coastwatch.pfeg.noaa.gov/erddap/download/setupDatasetsXml.html#cdm_data_type";
  }
  class {
    String ioos_category "Other";
    String long_name "ERDDAP Class";
    String references "https://coastwatch.pfeg.noaa.gov/erddap/download/setupDatasetsXml.html#datasetTypes";
  }
  title {
    String ioos_category "Other";
    String long_name "Title";
  }
  minLongitude {
    String ioos_category "Location";
    String long_name "Minimum Longitude";
    String units "degrees_east";
  }
  maxLongitude {
    String ioos_category "Location";
    String long_name "Maximum Longitude";
    String units "degrees_east";
  }
  longitudeSpacing {
    String ioos_category "Location";
    String long_name "Average Grid Longitude Spacing";
    String units "degrees_east";
  }
  minLatitude {
    String ioos_category "Location";
    String long_name "Minimum Latitude";
    String units "degrees_north";
  }
  maxLatitude {
    String ioos_category "Location";
    String long_name "Maximum Latitude";
    String units "degrees_north";
  }
  latitudeSpacing {
    String ioos_category "Location";
    String long_name "Average Grid Latitude Spacing";
    String units "degrees_north";
  }
  minAltitude {
    String ioos_category "Location";
    String long_name "Minimum Altitude (or negative Depth)";
    String positive "up";
    String units "m";
  }
  maxAltitude {
    String ioos_category "Location";
    String long_name "Maximum Altitude (or negative Depth)";
    String positive "up";
    String units "m";
  }
  minTime {
    String ioos_category "Time";
    String long_name "Minimum Time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  maxTime {
    String comment "If dataStructure=table and minTime is specified and maxTime isn't, then this is a near-real-time dataset.";
    String ioos_category "Time";
    String long_name "Maximum Time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  timeSpacing {
    String ioos_category "Time";
    String long_name "Average Grid Time Spacing";
    String units "seconds";
  }
  griddap {
    String comment "Add .html to see a data request web page.";
    String ioos_category "Other";
    String long_name "Base URL of OPeNDAP Grid Service";
  }
  subset {
    String ioos_category "Other";
    String long_name "URL of Subset Web Page";
  }
  tabledap {
    String comment "Add .html to see a data request web page.";
    String ioos_category "Other";
    String long_name "Base URL of OPeNDAP Table/Sequence Service";
  }
  MakeAGraph {
    String ioos_category "Other";
    String long_name "URL of Make-A-Graph Web Page";
  }
  sos {
    String comment "Or, replace 'service' with 'index.html' to see a web page with SOS information.";
    String ioos_category "Other";
    String long_name "Base URL of SOS Service";
  }
  wcs {
    String ioos_category "Other";
    String long_name "Base URL of WCS Service";
  }
  wms {
    String ioos_category "Other";
    String long_name "Base URL of WMS Service";
  }
  files {
    String comment "The \"files\" service lets you browse and download source files.";
    String ioos_category "Other";
    String long_name "Base URL of \"files\" Service";
  }
  fgdc {
    String comment "The FGDC .xml document has geographic metadata.";
    String ioos_category "Other";
    String long_name "URL of FGDC Document";
  }
  iso19115 {
    String comment "The ISO 19115 .xml document has geographic metadata.";
    String ioos_category "Other";
    String long_name "URL of ISO 19115 Document";
  }
  metadata {
    String comment "To make a complete URL, add .htmlTable, .csv, .tsv, .json, .xhtml, ... to the Base URL.";
    String ioos_category "Other";
    String long_name "Base URL of a Table with Metadata";
  }
  sourceUrl {
    String ioos_category "Other";
    String long_name "URL of the Source Data";
  }
  infoUrl {
    String ioos_category "Other";
    String long_name "URL of Background Information (from the source)";
  }
  rss {
    String ioos_category "Other";
    String long_name "URL of RSS";
  }
  email {
    String comment "To subscribe, add your email address to the Base URL.";
    String ioos_category "Other";
    String long_name "Base URL of Email Subscription";
  }
  testOutOfDate {
    String comment "This is the value of the dataset's testOutOfDate attribute. A dataset is considered out-of-date when its max(time) is before this testOutOfDate time. For out-of-date datasets, there is presumably a problem with the data source, so ERDDAP is unable to access data from more recent time points.";
    String ioos_category "Other";
    String long_name "testOutOfDate Attribute";
  }
  outOfDate {
    String comment "The outOfDate index is a simplistic measure of how out-of-date a dataset is: <0: unexpectedly from the future(!), <1: up-to-date, >=1: out-of-date, >=2: very out-of-date. For out-of-date datasets, there is presumably a problem with the data source, so ERDDAP is unable to access data from more recent time points.";
    String ioos_category "Other";
    String long_name "Out-Of-Date Index";
  }
  summary {
    String ioos_category "Other";
    String long_name "Summary Text";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "mcallahan@psmfc.org";
    String creator_name "Matt Callahan";
    String creator_url "https://erddap.psmfc.org/erddap";
    String defaultGraphQuery "maxLongitude,maxLatitude";
    String history 
"2024-11-01T00:00:39Z https://erddap.psmfc.org/erddap
2024-11-01T00:00:39Z https://erddap.psmfc.org/tabledap/allDatasets.das";
    String infoUrl "https://erddap.psmfc.org/erddap";
    String institution "AKFIN";
    String keywords "19115, accessible, altitude, average, background, base, dataset, depth, email, erddap, fgdc, graph, grid, information, institution, iso, latitude, location, longitude, make-a-graph, maximum, metadata, minimum, opendap, rss, sequence, service, sos, source, spacing, structure, subscription, subset, summary, table, time, title, url, wcs, wms";
    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 sourceUrl "https://erddap.psmfc.org/erddap";
    String subsetVariables "accessible, dataStructure, cdm_data_type, class, institution, testOutOfDate";
    String summary "This dataset is a table which has a row of information for each dataset currently active in this ERDDAP.";
    String title "* The List of All Active Datasets in this ERDDAP *";
  }
}

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.

ERDDAP, Version 2.23
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