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Dataset Title:	VIISTAI chlorophyll data from CTD water samples.
Institution:	University of New Hampshire (Dataset ID: VIISTAI_2024_06_KM2408_HARVEYCTD_CHL)
Range:	longitude = -125.35527 to -122.55702°E, latitude = 36.71462 to 41.83514°N, depth = 4.9 to 120.0m, time = 2024-05-29T18:11:00Z to 2024-06-24T14:08:00Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| Data Access Form

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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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.71700626e+9, 1.71923808e+9;
    String axis "T";
    String cf_role "profile_id";
    String ioos_category "Time";
    String long_name "time in UTC";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -125.355267, -122.557022;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 36.714619, 41.83514;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 actual_range 4.9, 120.0;
    String axis "Z";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  tube {
    Float64 actual_range 1.0, 600.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "tube number";
  }
  station {
    Float64 _FillValue NaN;
    Float64 actual_range 1.0, 5.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Identifier";
    String long_name "Station Number";
  }
  totalconc {
    Float64 actual_range 0.48645793103448276, 231.63473103448277;
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 0.03;
    String colorBarScale "Log";
    String ioos_category "Ocean Color";
    String long_name "Total concentration of chlorophyll A and phaeophytin";
    String standard_name "concentration_of_chlorophyll_in_sea_water";
    String units "ug/l";
  }
  chlorophyll_a {
    Float64 actual_range -101.50627310344827, 220.33467862068963;
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 0.03;
    String colorBarScale "Log";
    String ioos_category "Ocean Color";
    String long_name "Chlorophyll A concentration";
    String standard_name "concentration_of_chlorophyll_in_sea_water";
    String units "ug/l";
  }
  phaeophytin {
    Float64 actual_range 0.36647779310344825, 123.88718344827585;
    String ioos_category "Unknown";
    String long_name "phaeophytin concentration";
    String units "ug/l";
  }
  ctd_no {
    String ioos_category "Identifier";
    String long_name "CTD station identifier";
  }
  depthID {
    String ioos_category "Identifier";
    String long_name "Sample depth identifier";
    String standard_name "depth";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Profile";
    String cdm_profile_variables "time";
    String Conventions "COARDS, CF-1.10, ACDD-1.3";
    String creator_name "University of New Hampshire";
    String creator_type "institution";
    Float64 Easternmost_Easting -122.557022;
    String featureType "Profile";
    Float64 geospatial_lat_max 41.83514;
    Float64 geospatial_lat_min 36.714619;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -122.557022;
    Float64 geospatial_lon_min -125.355267;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 120.0;
    Float64 geospatial_vertical_min 4.9;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"Chlorophyll measurements from water samples collected by the Elizabeth Harvey Lab during the VIISTAI cruise, 2024/06/30
2024-12-18T04:38:10Z (local files)
2024-12-18T04:38:10Z http://erddap.marine.rutgers.edu/tabledap/VIISTAI_2024_06_KM2408_HARVEYCTD_CHL.das";
    String infoUrl "???";
    String institution "University of New Hampshire";
    String keywords "chemistry, chlorophyll, chlorophyll_a, color, concentration, concentration_of_chlorophyll_in_sea_water, conductivity, ctd, ctd_no, data, depth, depthID, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, hampshire, identifier, latitude, longitude, new, number, ocean, ocean color, oceans, phaeophytin, sample, samples, science, sea, seawater, sonde, station, statistics, temperature, time, total, totalconc, tube, university, viistai, water";
    String keywords_vocabulary "GCMD Science Keywords";
    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.";
    Float64 Northernmost_Northing 41.83514;
    String source "Chlorophyll measurements from water samples collected by the Elizabeth Harvey Lab during the VIISTAI cruise, 2024/06/30";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 36.714619;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String subsetVariables "ctd_no,time,depthID,station";
    String summary "VIISTAI chlorophyll data from Conductivity, Temperature, Depth (CTD) water samples.";
    String time_coverage_end "2024-06-24T14:08:00Z";
    String time_coverage_start "2024-05-29T18:11:00Z";
    String title "VIISTAI chlorophyll data from CTD water samples.";
    Float64 Westernmost_Easting -125.355267;
  }
}

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/erdGlobecBottle.htmlTable?longitude,latitude,time,bottle_posn,temperature1&time>=2002-08-17T00:00:00Z&time<=2002-08-19T20:18:00Z
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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