Make A Graph

Dataset Title:	RI Buoy Data
Institution:	Rhode Island Data Discovery (Dataset ID: combined_e784_bee5_492e)
Range:	longitude = -71.4459 to -71.2156°E, latitude = 41.4922 to 41.8418°N, depth = -0.71 to 24.89m, time = 2003-05-22T09:30:00Z to 2019-12-31T23:45:52Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form

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Graph Type:

X Axis:

Y Axis:

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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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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 {
    Int32 _ChunkSizes 17664;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.0535958e+9, 1.577835952e+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";
  }
  station_name {
    Int32 _ChunkSizes 17664;
    String cf_role "timeseries_id";
  }
  O2PercentSurface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -4.6, 368.6;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    Float64 missing_value NaN;
    String units "per cent";
  }
  O2PercentBottom {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.0, 225.0;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    Float64 missing_value NaN;
    String units "per cent";
  }
  depth {
    Int32 _ChunkSizes 17664;
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -0.71, 24.89;
    String axis "Z";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String ioos_category "Location";
    String long_name "Depth";
    Float64 missing_value NaN;
    String positive "down";
    String source_name "DepthSurface";
    String standard_name "depth";
    String units "m";
  }
  SalinityBottom {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.1, 33.7;
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    Float64 missing_value NaN;
    String standard_name "sea_water_practical_salinity";
    String units "PSU";
  }
  pHBottom {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 5.29, 11.33;
    Float64 colorBarMaximum 9.0;
    Float64 colorBarMinimum 7.0;
    Float64 missing_value NaN;
    String units "1";
  }
  DepthBottom {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.055, 14.412;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    Float64 missing_value NaN;
    String units "m";
  }
  TurbidityBottom {
    Float64 actual_range -0.3, 125.0;
    Float64 missing_value NaN;
  }
  ChlorophyllSurface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -4.8, 562.5;
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 0.03;
    String colorBarScale "Log";
    Float64 missing_value NaN;
    String units "ug L-1";
  }
  pHSurface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.0, 9.99;
    Float64 colorBarMaximum 9.0;
    Float64 colorBarMinimum 7.0;
    Float64 missing_value NaN;
    String units "1";
  }
  SpCondSurface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.0, 47502.0;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum 30.0;
    Float64 missing_value NaN;
    String units "mS cm-1";
  }
  SpCondBottom {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.215, 53.91;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum 30.0;
    Float64 missing_value NaN;
    String units "mS cm-1";
  }
  FSpercentSurface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -1.1, 133.3;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    Float64 missing_value NaN;
  }
  WaterTempBottom {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -1.6, 29.45;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    Float64 missing_value NaN;
    String units "degree_C";
  }
  O2Surface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -0.32, 27.13;
    Float64 colorBarMaximum 500.0;
    Float64 colorBarMinimum 0.0;
    Float64 missing_value NaN;
    String units "mg L-1";
  }
  O2Bottom {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.0, 143.5;
    Float64 colorBarMaximum 500.0;
    Float64 colorBarMinimum 0.0;
    Float64 missing_value NaN;
    String units "mg L-1";
  }
  WaterTempSurface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range -2.19, 50.0;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    Float64 missing_value NaN;
    String units "degree_C";
  }
  SalinitySurface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.0, 34.92;
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    Float64 missing_value NaN;
    String standard_name "sea_water_practical_salinity";
    String units "PSU";
  }
  DensitySurface {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.0, 1022.7684141996344;
    Float64 colorBarMaximum 2.0;
    Float64 colorBarMinimum 0.5;
    Float64 missing_value NaN;
    String standard_name "sea_surface_density";
    String units "g cm-3";
  }
  DensityBottom {
    Int32 _ChunkSizes 17664;
    Float64 _FillValue 9.969209968386869e+36;
    Float64 actual_range 0.0, 1023.9524519348588;
    Float64 colorBarMaximum 2.0;
    Float64 colorBarMinimum 0.5;
    Float64 missing_value NaN;
    String standard_name "sea_water_density";
    String units "g cm-3";
  }
  latitude {
    Int32 _ChunkSizes 17664;
    String _CoordinateAxisType "Lat";
    Float64 actual_range 41.4922, 41.8418;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String short_name "lat";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    Int32 _ChunkSizes 17664;
    String _CoordinateAxisType "Lon";
    Float64 actual_range -71.4459, -71.2156;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String short_name "lon";
    String standard_name "longitude";
    String units "degrees_east";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "O2PercentSurface,SalinityBottom,pHBottom,DepthBottom,TurbidityBottom,ChlorophyllSurface,pHSurface,SpCondSurface,SpCondBottom,FSpercentSurface,WaterTempBottom,O2Surface,WaterTempSurface,SalinitySurface";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    Float64 Easternmost_Easting -71.2156;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 41.8418;
    Float64 geospatial_lat_min 41.4922;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -71.2156;
    Float64 geospatial_lon_min -71.4459;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 24.89;
    Float64 geospatial_vertical_min -0.71;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2025-04-28T09:18:19Z (local files)
2025-04-28T09:18:19Z https://pricaimcit.services.brown.edu/tabledap/combined_e784_bee5_492e.das";
    String infoUrl "riddc.brown.edu";
    String institution "Rhode Island Data Discovery";
    String keywords "bottom, chemistry, chlorophyll, ChlorophyllSurface, concentration, cond, conductivity, data, density, depth, DepthBottom, dissolved, earth, Earth Science > Oceans > Ocean Chemistry > Chlorophyll, Earth Science > Oceans > Ocean Chemistry > Oxygen, Earth Science > Oceans > Ocean Chemistry > pH, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Conductivity, Earth Science > Oceans > Salinity/Density > Salinity, electrical, fractional, fractional_saturation_of_oxygen_in_sea_water, FSpercentSurface, mass, mass_concentration_of_chlorophyll_in_sea_water, mass_concentration_of_oxygen_in_sea_water, north, O2, O2PercentSurface, O2Surface, ocean, oceans, oxygen, percent, pHBottom, pHSurface, practical, prudence, reported, salinity, SalinityBottom, SalinitySurface, sample, saturated, saturation, scale, science, sea, sea_water_electrical_conductivity, sea_water_ph_reported_on_total_scale, sea_water_practical_salinity, sea_water_temperature, seawater, SpCondBottom, SpCondSurface, surface, temperature, time, total, turbidity, TurbidityBottom, water, WaterTempBottom, WaterTempSurface";
    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 41.8418;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 41.4922;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "RI Buoy Data.";
    String time_coverage_end "2019-12-31T23:45:52Z";
    String time_coverage_start "2003-05-22T09:30:00Z";
    String title "RI Buoy Data";
    Float64 Westernmost_Easting -71.4459;
  }
}

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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