Data Access Form

Dataset Title:	PacIOOS Water Quality Buoy KN (WQB-KN): Kilo Nalu, Oahu, Hawaii
Institution:	University of Hawaii (Dataset ID: wqbkn_agg)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

Variable	Minimum	Maximum
time (UTC)	2008-11-05T10:00:00Z

altitude (depth below mean sea level, m)	1.0	1.0

latitude (degrees_north)	21.28872	21.28872

longitude (degrees_east)	-157.865	-157.865

temperature (Celsius)	19.2741	27.3141
conductivity (S m-1)	0.00366	5.57839
oxygen (dissolved oxygen, kg m-3)	-0.001366842	0.01146669
turbidity (ntus)	-0.325	24.2685
chlorophyll (kg m-3)	-9.0E-7	4.8619E-5
salinity (1e-3)	0.0245	35.362

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.2258792e+9, 1.3691292e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    String short_name "time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  altitude {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float32 actual_range 1.0, 1.0;
    String axis "Z";
    String comment "The depth of the station, nominally 0 (see station information for details).";
    String ioos_category "Location";
    String long_name "depth below mean sea level";
    String positive "up";
    String short_name "depth";
    String standard_name "altitude";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 21.28872, 21.28872;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String short_name "lat";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -157.865, -157.865;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String short_name "lon";
    String standard_name "longitude";
    String units "degrees_east";
  }
  temperature {
    Float32 _FillValue -999.0;
    Float32 actual_range 19.2741, 27.3141;
    Float64 colorBarMaximum 30.85;
    Float64 colorBarMinimum 10.85;
    String ioos_category "Temperature";
    String long_name "Temperature";
    String short_name "temp";
    String standard_name "sea_water_temperature";
    String units "Celsius";
    Float64 valid_range 11.0, 31.0;
  }
  conductivity {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.00366, 5.57839;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Unknown";
    String long_name "Conductivity";
    String short_name "cond";
    String standard_name "sea_water_electrical_conductivity";
    String units "S m-1";
    Float64 valid_range 0.0, 50.0;
  }
  oxygen {
    Float32 _FillValue -999.0;
    Float32 actual_range -0.001366842, 0.01146669;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved O2";
    String long_name "dissolved oxygen";
    String short_name "doxy";
    String standard_name "mass_concentration_of_oxygen_in_sea_water";
    String units "kg m-3";
    Float64 valid_range 0.0, 10.0;
  }
  turbidity {
    Float32 _FillValue -999.0;
    Float32 actual_range -0.325, 24.2685;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Optical Properties";
    String long_name "Turbidity";
    String short_name "turb";
    String standard_name "turbidity_of_sea_water";
    String units "ntus";
    Float64 valid_range 0.0, 10.0;
  }
  chlorophyll {
    Float32 _FillValue -999.0;
    Float32 actual_range -9.0E-7, 4.8619E-5;
    Float64 colorBarMaximum 10.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Ocean Color";
    String long_name "Chlorophyll";
    String short_name "flor";
    String standard_name "chlorophyll_concentration_in_sea_water";
    String units "kg m-3";
    Float64 valid_range 0.0, 10.0;
  }
  salinity {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0245, 35.362;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum 10.0;
    String ioos_category "Salinity";
    String long_name "Salinity";
    String short_name "salt";
    String standard_name "sea_water_salinity";
    String units "1e-3";
    Float64 valid_range 10.0, 40.0;
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Point";
    String Conventions "CF-1.4";
    Float64 Easternmost_Easting -157.865;
    String featureType "Point";
    Float64 geospatial_lat_max 21.28872;
    Float64 geospatial_lat_min 21.28872;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -157.865;
    Float64 geospatial_lon_min -157.865;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 1.0;
    Float64 geospatial_vertical_min 1.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    String history 
"2013-05-21T21:13:16Z http://pacioos.org
2013-05-21T21:13:16Z http://oos.soest.hawaii.edu/erddap/tabledap/wqbkn_agg.html";
    String infoUrl "http://pacioos.org";
    String institution "University of Hawaii";
    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 21.28872;
    String sourceUrl "http://pacioos.org";
    Float64 Southernmost_Northing 21.28872;
    String summary 
"The water quality buoys are part of the Pacific Islands Ocean Observing
System (PacIOOS) and are designed to measure a variety of ocean parameters at
fixed points. WQB-KN is located at the Kilo Nalu Nearshore Reef Observatory,
near Kakaako Waterfront Park and Kewalo Basin off of Ala Moana Boulevard in
Honolulu. Continuous sampling of this area provides a record of baseline
conditions of the chemical and biological environment for comparison when
there are pollution events such as storm runoff or a sewage spill.";
    String time_coverage_end "2013-05-21T09:40:00Z";
    String time_coverage_start "2008-11-05T10:00:00Z";
    String title "PacIOOS Water Quality Buoy KN (WQB-KN): Kilo Nalu, Oahu, Hawaii";
    Float64 Westernmost_Easting -157.865;
  }
}

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via a specially formed URL. tabledap uses the OPeNDAP Data Access Protocol (DAP) and its selection constraints.

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file
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(easy) You can get data by using the dataset's Data Access Form or Subset form.
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Tabledap request URLs must be in the form
http://oos.soest.hawaii.edu/erddap/tabledap/datasetID.fileType{?query}
For example,
http://oos.soest.hawaii.edu/erddap/tabledap/pmelTao.htmlTable?longitude,latitude,time,sea_surface_temperature&longitude>180&longitude<180.2&latitude>0&latitude<0.2&time>2007-06-01T00:00:00Z
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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