CalCOFI ERDDAP
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Dataset Title:	CalCOFI Zooplankton Tows
Institution:	CalCOFI (Dataset ID: calcofi_zooplankton)
Range:	longitude = -135.0 to -117.0°E, latitude = 23.0 to 50.933°N, time = 1926-06-11T00:00:00Z to 2024-04-19T07:11:00Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| Data Access Form \| Files

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Graph Type:

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Y Axis:

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Constraints

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Constraint #1

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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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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 {
  expedition {
    String ioos_category "Other";
    String long_name "Expedition";
  }
  expedition_code {
    String ioos_category "Identifier";
    String long_name "Expedition code";
  }
  expedition_type {
    String ioos_category "Other";
    String long_name "Expedition type";
  }
  ship_name {
    String ioos_category "Other";
    String long_name "Ship name";
  }
  order_occ {
    Int32 actual_range 1, 222;
    String ioos_category "Other";
    String long_name "Order occ";
  }
  line {
    Float64 actual_range -11.1, 140.0;
    String ioos_category "Location";
    String long_name "Line";
  }
  station {
    Float64 actual_range -4.7, 15420.0;
    String ioos_category "Location";
    String long_name "Station";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 23.0, 50.933;
    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 -135.0, -117.0;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  date {
    String ioos_category "Time";
    String long_name "Date";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range -1.374624e+9, 1.71351066e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  datetime_end_utc {
    String ioos_category "Time";
    String long_name "Datetime end utc";
  }
  depth_min_m {
    Float64 actual_range -888.0, 2620.0;
    String ioos_category "Location";
    String long_name "Depth min m";
    String units "m";
  }
  depth_max_m {
    Float64 actual_range -888.0, 4840.0;
    String ioos_category "Location";
    String long_name "Depth max m";
    String units "m";
  }
  max_wire_out_m {
    Float64 actual_range -888.0, 7000.0;
    String ioos_category "Other";
    String long_name "Max wire out m";
    String units "m";
  }
  net_type {
    String ioos_category "Other";
    String long_name "Net type";
  }
  mesh_size_mm {
    Float64 actual_range 0.035, 5.0;
    String ioos_category "Other";
    String long_name "Mesh size mm";
    String units "mm";
  }
  tow_type {
    String ioos_category "Other";
    String long_name "Tow type";
  }
  fixative {
    String ioos_category "Other";
    String long_name "Fixative";
  }
  preservative {
    String ioos_category "Other";
    String long_name "Preservative";
  }
  site_key {
    String ioos_category "Identifier";
    String long_name "Site key";
  }
  tow_id {
    Int32 actual_range 1, 99530;
    String ioos_category "Identifier";
    String long_name "Tow id";
  }
  ship_key {
    String ioos_category "Identifier";
    String long_name "Ship key";
  }
  cruise_key {
    String ioos_category "Identifier";
    String long_name "Cruise key";
  }
  grid_key {
    String ioos_category "Identifier";
    String long_name "Grid key";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Point";
    String Conventions "COARDS, CF-1.10, ACDD-1.3";
    String creator_name "CalCOFI";
    String creator_url "https://calcofi.org";
    Float64 Easternmost_Easting -117.0;
    String featureType "Point";
    Float64 geospatial_lat_max 50.933;
    Float64 geospatial_lat_min 23.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -117.0;
    Float64 geospatial_lon_min -135.0;
    String geospatial_lon_units "degrees_east";
    String history 
"2026-06-15T16:45:45Z (local files)
2026-06-15T16:45:45Z http://localhost:8090/tabledap/calcofi_zooplankton.das";
    String infoUrl "https://calcofi.org";
    String institution "CalCOFI";
    String license "CC-BY 4.0";
    Float64 Northernmost_Northing 50.933;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 23.0;
    String standard_name_vocabulary "CF Standard Name Table v79";
    String subsetVariables "cruise_key, line, station, site_key";
    String summary "SIO PIC zooplankton net-tow registry (CalCOFI region).";
    String time_coverage_end "2024-04-19T07:11:00Z";
    String time_coverage_start "1926-06-11T00:00:00Z";
    String title "CalCOFI Zooplankton Tows";
    Float64 Westernmost_Easting -135.0;
  }
}

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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