Data Access Form

Dataset Title:	21415 (LLNR 984.85) - ATTU - 175 NM South of Attu, AK
Institution:	NOAA National Data Buoy Center (NDBC) (Dataset ID: gov-ndbc-dart-21415)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Make a graph

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Variable	Minimum	Maximum
time (UTC)	2007-07-28T12:15:00Z	2024-12-22T06:00:00Z

latitude (degrees_north)	50.153	50.153

longitude (degrees_east)	171.897	171.897

z (Altitude, m)	0.0	0.0
sea_floor_depth_below_sea_surface (m)	1.0	4805.7709960938
sea_floor_depth_below_sea_surface_qc_agg	2	2
sea_floor_depth_below_sea_surface_qc_tests
station

Server-side Functions

distinct()

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    UInt32 _ChunkSizes 512;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.1856249e+9, 1.7348472e+9;
    String axis "T";
    String calendar "gregorian";
    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 _FillValue NaN;
    Float64 actual_range 50.153, 50.153;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue NaN;
    Float64 actual_range 171.897, 171.897;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  z {
    UInt32 _ChunkSizes 512;
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 _FillValue NaN;
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  sea_floor_depth_below_sea_surface {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue -9999.0;
    Float64 actual_range 1.0, 4805.7709960938;
    String ancillary_variables "sea_floor_depth_below_sea_surface_qc_agg sea_floor_depth_below_sea_surface_qc_tests";
    String id "1096215";
    String ioos_category "Other";
    String long_name "Sea Floor Depth Below Sea Surface";
    Float64 missing_value -9999.0;
    String platform "station";
    String short_name "sea_floor_depth_below_sea_surface";
    String standard_name "sea_floor_depth_below_sea_surface";
    String standard_name_url "http://mmisw.org/ont/cf/parameter/sea_floor_depth_below_sea_surface";
    String units "m";
  }
  sea_floor_depth_below_sea_surface_qc_agg {
    UInt32 _ChunkSizes 4096;
    Int32 _FillValue -127;
    Int32 actual_range 2, 2;
    String flag_meanings "PASS NOT_EVALUATED SUSPECT FAIL MISSING";
    Int32 flag_values 1, 2, 3, 4, 9;
    String ioos_category "Other";
    String long_name "Sea Floor Depth Below Sea Surface QARTOD Aggregate Quality Flag";
    Int32 missing_value -127;
    String short_name "sea_floor_depth_below_sea_surface_qc_agg";
    String standard_name "aggregate_quality_flag";
  }
  sea_floor_depth_below_sea_surface_qc_tests {
    UInt32 _ChunkSizes 512;
    Float64 _FillValue 0;
    String comment "11-character string with results of individual QARTOD tests. 1: Gap Test, 2: Syntax Test, 3: Location Test, 4: Gross Range Test, 5: Climatology Test, 6: Spike Test, 7: Rate of Change Test, 8: Flat-line Test, 9: Multi-variate Test, 10: Attenuated Signal Test, 11: Neighbor Test";
    String flag_meanings "PASS NOT_EVALUATED SUSPECT FAIL MISSING";
    Int32 flag_values 1, 2, 3, 4, 9;
    String ioos_category "Other";
    String long_name "Sea Floor Depth Below Sea Surface QARTOD Individual Tests";
    String short_name "sea_floor_depth_below_sea_surface_qc_tests";
    String standard_name "quality_flag";
  }
  station {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String ioos_code "urn:ioos:station:com.axiomdatascience:124737";
    String long_name "21415 (LLNR 984.85) - ATTU - 175 NM South of Attu, AK";
    String short_name "gov-ndbc-dart-21415";
    String type "buoy";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station,longitude,latitude";
    String contributor_email ",,None,feedback@axiomdatascience.com";
    String contributor_name "Deep-ocean Assessment and Reporting of Tsunamis (DART),World Meteorological Organization (WMO),United States Coast Guard (USCG),Axiom Data Science";
    String contributor_role "contributor,contributor,contributor,processor";
    String contributor_role_vocabulary "NERC";
    String contributor_url "https://www.ndbc.noaa.gov/dart/dart.shtml,https://wmo.int/,http://www.uscg.mil/,https://www.axiomdatascience.com";
    String Conventions "IOOS-1.2, CF-1.6, ACDD-1.3, NCCSV-1.2";
    String creator_country "USA";
    String creator_email "webmaster.ndbc@noaa.gov";
    String creator_institution "NOAA National Data Buoy Center (NDBC)";
    String creator_name "NOAA National Data Buoy Center (NDBC)";
    String creator_sector "gov_federal";
    String creator_type "institution";
    String creator_url "https://www.ndbc.noaa.gov/";
    String defaultDataQuery "sea_floor_depth_below_sea_surface,sea_floor_depth_below_sea_surface_qc_agg,z,time&time>=max(time)-3days";
    Float64 Easternmost_Easting 171.897;
    String featureType "TimeSeries";
    Float64 geospatial_lat_max 50.153;
    Float64 geospatial_lat_min 50.153;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 171.897;
    Float64 geospatial_lon_min 171.897;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    String history 
"Downloaded from NOAA National Data Buoy Center (NDBC) at 
2024-12-22T19:22:41Z https://www.ndbc.noaa.gov/station_page.php?station=21415
2024-12-22T19:22:41Z http://erddap.aoos.org/erddap/tabledap/gov-ndbc-dart-21415.html";
    Int32 id 124737;
    String infoUrl "https://sensors.ioos.us/#metadata/124737/station";
    String institution "NOAA National Data Buoy Center (NDBC)";
    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.";
    String naming_authority "com.axiomdatascience";
    Float64 Northernmost_Northing 50.153;
    String platform "buoy";
    String platform_name "21415 (LLNR 984.85) - ATTU - 175 NM South of Attu, AK";
    String platform_vocabulary "http://mmisw.org/ont/ioos/platform";
    String processing_level "Level 2";
    String publisher_country "USA";
    String publisher_email "webmaster.ndbc@noaa.gov";
    String publisher_institution "NOAA National Data Buoy Center (NDBC)";
    String publisher_name "NOAA National Data Buoy Center (NDBC)";
    String publisher_sector "gov_federal";
    String publisher_type "institution";
    String publisher_url "https://www.ndbc.noaa.gov/";
    String references "https://www.ndbc.noaa.gov/station_page.php?station=21415,,";
    String sourceUrl "https://www.ndbc.noaa.gov/station_page.php?station=21415";
    Float64 Southernmost_Northing 50.153;
    String standard_name_vocabulary "CF Standard Name Table v72";
    String station_id "124737";
    String summary "Timeseries data from '21415 (LLNR 984.85) - ATTU - 175 NM South of Attu, AK' (gov-ndbc-dart-21415)";
    String time_coverage_end "2024-12-22T06:00:00Z";
    String time_coverage_start "2007-07-28T12:15:00Z";
    String title "21415 (LLNR 984.85) - ATTU - 175 NM South of Attu, AK";
    Float64 Westernmost_Easting 171.897;
    String wmo_platform_code "21415";
  }
}

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.