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Dataset Title:  SIO PIC Zooplankton Net Tows — sampling events Subscribe RSS
Institution:  CalCOFI   (Dataset ID: sio_pic-zooplankton_sample)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Data Access Form
 
Graph Type:  ?
X Axis: 
Y Axis: 
Color: 
-1+1
 
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.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")
 
Graph Settings
Marker Type:   Size: 
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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: 
Time range:           -   +  
[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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  sample_key {
    String ioos_category "Identifier";
    String long_name "Sample key";
  }
  sample_type {
    String ioos_category "Other";
    String long_name "Sample type";
  }
  parent_sample_key {
    String ioos_category "Identifier";
    String long_name "Parent sample key";
  }
  cruise_key {
    String ioos_category "Identifier";
    String long_name "Cruise key";
  }
  grid_key {
    String ioos_category "Identifier";
    String long_name "Grid key";
  }
  site_key {
    String ioos_category "Identifier";
    String long_name "Site key";
  }
  order_occ {
    String ioos_category "Other";
    String long_name "Order occ";
  }
  time {
    String _CoordinateAxisType "Time";
    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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  depth_max_m {
    String ioos_category "Location";
    String long_name "Depth max m";
  }
  tow_type {
    String ioos_category "Other";
    String long_name "Tow type";
  }
 }
  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";
    String dataset_key "sio_pic-zooplankton";
    String db_release "v2026.08.08";
    String featureType "Point";
    String geospatial_lat_units "degrees_north";
    String geospatial_lon_units "degrees_east";
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2026-08-11T13:38:22Z (source database)
2026-08-11T13:38:22Z http://localhost:8090/tabledap/sio_pic-zooplankton_sample.das";
    String infoUrl "https://calcofi.org";
    String institution "CalCOFI";
    String license "CC-BY 4.0";
    String references "https://calcofi.io/workflows/publish_to-erddap.html";
    String sourceUrl "(source database)";
    String standard_name_vocabulary "CF Standard Name Table v79";
    String subsetVariables "cruise_key, site_key";
    String summary "Zooplankton net-tow sample registry from the SIO Pelagic Invertebrate Collection, scoped to CalCOFI-program expeditions. Position, time, depth, and gear metadata per tow. Includes the historical grid (1950s-80s inshore, Gulf of California and Baja lines), not just the modern pattern. Biovolume measurements are not in the source file and are pending from the provider (see Questions for Data Providers). One row per sampling event, with event-level effort widened into its own columns. Use this for effort and station counting — summing effort over the observation table double-counts it. Source: CalCOFI integrated database release v2026.08.08.";
    String title "SIO PIC Zooplankton Net Tows — sampling events";
  }
}

 

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.

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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