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ERDDAP > tabledap > Make A Graph ?

Dataset Title:  CalCOFI NOAAHydros Subscribe RSS
Institution:  NOAA SWFSC   (Dataset ID: erdNOAAhydros)
Range: longitude = -179.822 to -78.493°E, latitude = 0.237 to 51.05°N, time = 1941-07-24T09:41:00Z to 2017-11-24T04:06:00Z
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() ?
? (" ")
 
Graph Settings
Marker Type:   Size: 
Color: 
Color Bar:   Continuity:   Scale: 
   Minimum:   Maximum:   N Sections: 
Draw land mask: 
Y Axis Minimum:   Maximum:   Ascending: 
 
(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: 
[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 {
  cruise {
    String description "Six-digit cruise code (YYYYMM)";
    String ioos_category "Identifier";
    String long_name "Cruise Code";
  }
  ship {
    String ioos_category "Identifier";
    String long_name "Ship Name";
  }
  ship_code {
    String description "Two-digit CalCOFI ship code";
    String ioos_category "Identifier";
    String long_name "Ship Code";
  }
  order_occupied {
    String description "Ordinal number in which the station was sampled for the cruise and ship";
    String ioos_category "Identifier";
    String long_name "Order Occupied";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range -8.9748834e+8, 1.51149636e+9;
    String axis "T";
    String description "Estimated datetime in which the hydrocast occured";
    String ioos_category "Time";
    String long_name "Estimated datetime";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  cast_type {
    String description "Type of sample: \"bottle_10m\", \"bucket\", \"CTD\", or \"hydrocast\"";
    String ioos_category "Identifier";
    String long_name "Cast Type";
  }
  standard_depth {
    Float32 actual_range 0.0, 3600.0;
    String description "Standard depth for the cast";
    String ioos_category "Other";
    String long_name "Standard Depth";
    String units "meters";
  }
  temperature {
    String ioos_category "Other";
    String long_name "Water Temperature";
    String units "degree C";
  }
  salinity {
    String ioos_category "Other";
    String long_name "Salinity";
    String units "psu";
  }
  density {
    String ioos_category "Other";
    String long_name "Water Density";
    String units "1000*(g/l - 1)";
  }
  oxygen {
    String ioos_category "Other";
    String long_name "Dissolved Oxygen Content";
    String units "ml/l";
  }
  dynamic_height {
    String ioos_category "Other";
    String long_name "Dynamic Height";
    String units "dynamic meter";
  }
  percent_saturation {
    String ioos_category "Other";
    String long_name "Percent Oxygen saturation";
    String units "%";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 0.237, 51.05;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.822, -78.493;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  line {
    Float32 actual_range -29.5, 379.7;
    String description "CalCOFI line number";
    String ioos_category "Identifier";
    String long_name "Line";
  }
  station {
    Float32 actual_range -276.6, 816.6;
    String description "CalCOFI station number";
    String ioos_category "Identifier";
    String long_name "Station";
  }
 }
  NC_GLOBAL {
    String acknowledgment "National Oceanic and Atmospheric Administration, California Department of Fish and Wildlife, University of California, San Diego Scripps Institution";
    String cdm_data_type "Point";
    String Conventions "COARDS, CF-1.0, Unidata Dataset Discovery v1.0, NCCSV-1.0";
    String date_issued "2016-05-24";
    String date_modified "2016-05-24";
    String defaultGraphQuery "longitude,latitude,temperature&cruise=\"201504\"";
    Float64 Easternmost_Easting -78.493;
    String featureType "Point";
    Float64 geospatial_lat_max 51.05;
    Float64 geospatial_lat_min 0.237;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -78.493;
    Float64 geospatial_lon_min -179.822;
    String geospatial_lon_units "degrees_east";
    String history 
"2018-11-14T07:39:01Z (source database)
2018-11-14T07:39:01Z http://coastwatch.pfeg.noaa.gov/tabledap/erdNOAAhydros.das";
    String infoUrl "https://oceanview.pfeg.noaa.gov/CalCOFI/calcofi_info.html";
    String institution "NOAA SWFSC";
    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 51.05;
    String project "CalCOFI";
    String publisher_email "ed.weber@noaa.gov";
    String publisher_name "Ed Weber";
    String sourceUrl "(source database)";
    Float64 Southernmost_Northing 0.237;
    String standard_name_vocabulary "CF-11";
    String subsetVariables "cruise, station, line, standard_depth,cast_type";
    String summary "Hydrographic data collected by bucket, CTD, or 10-m Niskin bottle as part of CalCOFI and related cruises. Note that most oxygen and salinity values in this table have not been calibrated with water samples. Most users will want to use the Scripps hydrographic data instead.";
    String time_coverage_end "2017-11-24T04:06:00Z";
    String time_coverage_start "1941-07-24T09:41:00Z";
    String title "CalCOFI NOAAHydros";
    Float64 Westernmost_Easting -179.822;
  }
}

 

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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