Make A Graph

Dataset Title:	AIW AT HIGHWAY 9 AT NIXONS CROSSROADS, SC
Institution:	USGS National Water Information System NWIS (Dataset ID: gov_usgs_waterdata_02110777)
Range:	longitude = -78.655846 to -78.655846°E, latitude = 33.851562 to 33.851562°N, depth = 0.0 to 0.0, time = 2015-05-05T12:15:00Z to 2017-08-17T02:15:00Z
Information:	Summary \| FGDC \| ISO 19115 \| Metadata \| Background \| 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()

(" ")

Graph Settings

Marker Type:

Size:

Color:

Color Bar: Continuity: Scale:

Min: Max: N Sections:

Draw the land mask:

Y Axis Minimum: Maximum:

(Please be patient. It may take a while to get the data.)

Optional:
Then set the File Type: and

or view the URL:
(Documentation / Bypass this form

) (File Type information)

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:

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 1.4308281e+9, 1.5029361e+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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 33.8515612, 33.8515612;
    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 -78.6558483, -78.6558483;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  station {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
  }
  sea_water_temperature {
    Float64 _FillValue -9999.99;
    String ioos_category "Other";
    String long_name "Water Temperature";
    Float64 missing_value -9999.99;
    String standard_name "sea_water_temperature";
    String units "degree_Fahrenheit";
    String urn "http://mmisw.org/ont/cf/parameter/sea_water_temperature";
  }
  sea_water_electrical_conductivity {
    Float64 _FillValue -9999.99;
    String ioos_category "Other";
    String long_name "Conductivity";
    Float64 missing_value -9999.99;
    String standard_name "sea_water_electrical_conductivity";
    String units "mS.cm-1";
    String urn "http://mmisw.org/ont/cf/parameter/sea_water_electrical_conductivity";
  }
  mass_concentration_of_oxygen_in_sea_water {
    Float64 _FillValue -9999.99;
    String ioos_category "Other";
    String long_name "Oxygen Concentration";
    Float64 missing_value -9999.99;
    String standard_name "mass_concentration_of_oxygen_in_sea_water";
    String units "1e-6";
    String urn "http://mmisw.org/ont/cf/parameter/mass_concentration_of_oxygen_in_sea_water";
  }
  height {
    Float64 _FillValue -9999.99;
    String ioos_category "Other";
    String long_name "Stream Height";
    Float64 missing_value -9999.99;
    String standard_name "height";
    String units "ft";
    String urn "http://mmisw.org/ont/cf/parameter/height";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "sea_water_temperature,sea_water_electrical_conductivity,mass_concentration_of_oxygen_in_sea_water,height";
    Float64 Easternmost_Easting -78.6558483;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 33.8515612;
    Float64 geospatial_lat_min 33.8515612;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -78.6558483;
    Float64 geospatial_lon_min -78.6558483;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2017-08-17T09:44:31Z http://sensors.axds.co/stationsensorservice/
2017-08-17T09:44:31Z http://erddap.secoora.org/tabledap/gov_usgs_waterdata_02110777.das";
    String infoUrl "http://axiomdatascience.com";
    String institution "USGS National Water Information System NWIS";
    Float64 Northernmost_Northing 33.8515612;
    String sourceUrl "http://sensors.axds.co/stationsensorservice/";
    Float64 Southernmost_Northing 33.8515612;
    String summary 
"Timeseries data from 'AIW AT HIGHWAY 9 AT NIXONS CROSSROADS, SC'
(urn:ioos:station:gov.usgs.waterdata:02110777)";
    String time_coverage_end "2017-08-17T02:15:00Z";
    String time_coverage_start "2015-05-05T12:15:00Z";
    String title "AIW AT HIGHWAY 9 AT NIXONS CROSSROADS, SC";
    Float64 Westernmost_Easting -78.6558483;
  }
}

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
http://erddap.secoora.org/erddap/tabledap/datasetID.fileType{?query}
For example,
http://erddap.secoora.org/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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