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Dataset Title:  Global Drifter Program hourly drifting buoy collection Subscribe RSS
Institution:  NOAA Atlantic Oceanographic and Meteorological Laboratory   (Dataset ID: gdp_hourly_velocities)
Range: longitude = -180.0 to 180.0°E, latitude = -78.30718 to 89.89858°N, time = 1987-10-02T13:00:00Z to 2020-06-30T23:00:00Z
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Subset | Data Access Form | Files
 
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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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  ID {
    String cf_role "trajectory_id";
    String long_name "Global Drifter Program Buoy ID";
  }
  location_type {
    String long_name "Location Type - GPS or Argos";
  }
  WMO {
    Int32 actual_range 0, 8800888;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String history "From dirall.dat";
    String long_name "World Meteorological Organization buoy identification number";
    Int32 missing_value -999;
  }
  expno {
    Int32 actual_range 46, 31599;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String history "From dirall.dat";
    String long_name "Experiment number";
    Int32 missing_value -999;
    String units "count";
  }
  deploy_date {
    Float64 actual_range 5.601312e+8, 1.58526694e+9;
    String history "From deplog.dat";
    String ioos_category "Time";
    String long_name "Deployment date and time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  deploy_lat {
    Float64 actual_range -77.81, 89.142;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String history "From deplog.dat";
    String long_name "Deployment latitude";
    Float64 missing_value -1.0e+34;
    String units "degrees_north";
  }
  deploy_lon {
    Float64 actual_range -180.0, 180.0;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String history "From deplog.dat";
    String long_name "Deployment longitude";
    Float64 missing_value -1.0e+34;
    String units "degrees_east";
  }
  end_date {
    Float64 actual_range 5.626368e+8, 1.601424e+9;
    String history "From dirall.dat";
    String ioos_category "Time";
    String long_name "End date and time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  end_lat {
    Float64 actual_range -77.49, 99.54;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String history "From dirall.dat";
    String long_name "End latitude";
    Float64 missing_value -1.0e+34;
    String units "degrees_north";
  }
  end_lon {
    Float64 actual_range -179.99, 179.98;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String history "From dirall.dat";
    String long_name "End longitude";
    Float64 missing_value -1.0e+34;
    String units "degrees_east";
  }
  drogue_lost_date {
    Float64 actual_range 0.0, 1.60038694e+9;
    String history "From dirall.dat";
    String ioos_category "Time";
    String long_name "Date of drogue loss (missing value=drogue still attached; 0=drogue status uncertain from beginning)";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  typedeath {
    Int32 actual_range 0, 6;
    String history "From dirall.dat";
    String long_name "Type of death (0=buoy still alive, 1=buoy ran aground, 2=picked up by vessel, 3=stop transmitting, 4=sporadic transmissions, 5=bad batteries, 6=inactive status)";
    Int32 missing_value -999;
  }
  typebuoy {
    String history "From dirall.dat";
    String long_name "Buoy type (see https://www.aoml.noaa.gov/phod/dac/dirall.html)";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -180.0, 180.0;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    Float32 missing_value -1.0e+34;
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -78.30718, 89.89858;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    Float32 missing_value -1.0e+34;
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 90.0;
    Float32 valid_min -90.0;
  }
  lon360 {
    Float32 actual_range 0.0, 360.0;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String long_name "Longitude";
    Float32 missing_value -1.0e+34;
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 360.0;
    Float32 valid_min 0.0;
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 5.60178e+8, 1.593558e+9;
    String axis "T";
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum -100.0;
    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";
    Float64 valid_max 90.0;
    Float64 valid_min -90.0;
  }
  ve {
    Float32 actual_range -8.3641, 50.1599;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String long_name "Eastward velocity";
    Float32 missing_value -1.0e+34;
    String standard_name "surface_eastward_sea_water_velocity";
    String units "m/s";
  }
  vn {
    Float32 actual_range -7.5208, 4.5053;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum -0.5;
    String long_name "Northward velocity";
    Float32 missing_value -1.0e+34;
    String standard_name "surface_northward_sea_water_velocity";
    String units "m/s";
  }
  err_lat {
    Float32 actual_range 0.0, 1.08302;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String long_name "95% confidence interval in latitude";
    Float32 missing_value -1.0e+34;
    String units "degrees_north";
  }
  err_lon {
    Float32 actual_range 0.0, 359.9995;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String long_name "95% confidence interval in longitude";
    Float32 missing_value -1.0e+34;
    String units "degrees_east";
  }
  err_ve {
    Float32 actual_range 0.0, 201.9779;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String long_name "95% confidence interval in eastward velocity";
    Float32 missing_value -1.0e+34;
    String units "m/s";
  }
  err_vn {
    Float32 actual_range 0.0, 6.6311;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String long_name "95% confidence interval in northward velocity";
    Float32 missing_value -1.0e+34;
    String units "m/s";
  }
  gap {
    Float32 actual_range 0.0, 43200.0;
    String long_name "time interval between previous and next location fix";
    Float32 missing_value -1.0e+34;
    String units "seconds";
  }
  rowsize {
    Int32 actual_range 13, 66417;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String long_name "number of obs for this trajectory";
    String sample_dimension "obs";
  }
  DeployingShip {
    String long_name "Deploying Ship";
  }
  DeploymentStatus {
    String long_name "Status of Deployment";
  }
  BuoyTypeManufacturer {
    String long_name "Buoy Type Manufacturer";
  }
  BuoyTypeSensorArray {
    String long_name "Buoy Type Sensor Array";
  }
  CurrentProgram {
    String long_name "Current Program";
  }
  PurchaserFunding {
    String long_name "Purchaser Funding";
  }
  SensorUpgrade {
    String long_name "Sensor Upgrade";
  }
  Transmissions {
    String long_name "Transmissions";
  }
  DeployingCountry {
    String long_name "Deploying Country";
  }
  DeploymentComments {
    String long_name "Deployment Comments";
  }
  ManufactureYear {
    String long_name "Manufacture Year";
  }
  ManufactureMonth {
    String long_name "Manufacture Month";
  }
  ManufactureSensorType {
    String long_name "Manufacture Sensor Type";
  }
  ManufactureVoltage {
    String long_name "Manufacture Voltage";
  }
  FloatDiameter {
    String long_name "Float Diameter";
  }
  SubsfcFloatPresence {
    String long_name "Subsfc Float Presence";
  }
  DrogueType {
    String long_name "Drogue Type";
  }
  DrogueLength {
    String long_name "Drogue Length";
  }
  DrogueBallast {
    String long_name "Drogue Ballast";
  }
  DragAreaAboveDrogue {
    String long_name "Drag Area Above Drogue";
  }
  DragAreaOfDrogue {
    String long_name "Drag Area Of Drogue";
  }
  DragAreaRatio {
    String long_name "Drag Area Ratio";
  }
  DrogueCenterDepth {
    String long_name "Drogue Center Depth";
  }
  DrogueDetectSensor {
    String long_name "Drogue Detect Sensor";
  }
 }
  NC_GLOBAL {
    String acknowledgement "Elipot et al. (2016). Global Drifter Program quality-controlled hourly interpolated data from ocean surface drifting buoys, version 1.04c. NOAA National Centers for Environmental Information. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2016JC011716TBA. Accessed [date].";
    String cdm_data_type "Trajectory";
    String cdm_trajectory_variables "ID";
    String comment "Global Drifter Program hourly data";
    String contributor_name "NOAA Global Drifter Program";
    String contributor_role "Data Acquisition Center";
    String Conventions "CF-1.6, ACDD-1.3, COARDS";
    String creator_email "aoml.dftr@noaa.gov";
    String creator_name "GDP drifter DAC";
    String creator_type "institution";
    String creator_url "https://www.aoml.noaa.gov/phod/gdp";
    String date_created "2021-01-22T05:01:47Z";
    String date_issued "2021-01-22T01:01:03Z";
    String date_modified "2021-01-22T01:01:03Z";
    String doi "10.1002/2016JC011716TBA";
    Float64 Easternmost_Easting 180.0;
    String featureType "Trajectory";
    Float64 geospatial_lat_max 89.89858;
    Float64 geospatial_lat_min -78.30718;
    String geospatial_lat_resolution "tbd";
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 180.0;
    Float64 geospatial_lon_min -180.0;
    String geospatial_lon_resolution "tbd";
    String geospatial_lon_units "degrees_east";
    String history 
"Version 1.04c.  Metadata from dirall.dat and deplog.dat
2023-09-22T12:30:30Z (local files)
2023-09-22T12:30:30Z https://data.pmel.noaa.gov/generic/tabledap/gdp_hourly_velocities.das";
    String infoUrl "https://www.aoml.noaa.gov/phod/dac/dirall.html";
    String institution "NOAA Atlantic Oceanographic and Meteorological Laboratory";
    String interpolation_method "Locally Weighted Scatterplot Smoothing";
    String keywords "aground, alive, atlantic, attached, bad, batteries, beginning, between, buoy, circulation, collection, confidence, currents, data, date, death, deploy_date, deploy_lat, deploy_lon, deployment, drifter, drifting, drogue, drogue_lost_date, earth, Earth Science > Oceans > Ocean Circulation > Ocean Currents, eastward, end, end_date, end_lat, end_lon, err_lat, err_lon, err_ve, err_vn, experiment, expno, fix, gap, global, hour, hourly, identification, inactive, interpolated, interval, laboratory, latitude, lon360, longitude, loss, meteorological, missing, next, noaa, northward, number, obs, observations, ocean, oceanographic, oceans, organisation, organization, percent, picked, previous, program, ran, rowsize, science, sea, seawater, see, sporadic, status, still, stop, surface, surface current, surface_eastward_sea_water_velocity, surface_northward_sea_water_velocity, time, trajectory, transmissions, transmitting, type, typebuoy, typedeath, uncertain, value, velocity, vessel, water, WMO, world";
    String keywords_vocabulary "GCMD Science Keywords";
    String licence "freely available";
    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 metadata_link "https://www.aoml.noaa.gov/phod/dac/dirall.html";
    Float64 Northernmost_Northing 89.89858;
    String processing_level "Level 2 QC by GDP drifter DAC";
    String publisher_email "aoml.dftr@noaa.gov";
    String publisher_name "GDP Drifter DAC";
    String publisher_type "institution";
    String publisher_url "https://www.aoml.noaa.gov/phod/gdp";
    String source "source description";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -78.30718;
    String standard_name_vocabulary "CF Standard Name Table v30";
    String subsetVariables "ID, location_type, WMO, expno";
    String summary "Global Drifter Program hourly data";
    String time_coverage_end "2020-06-30T23:00:00Z";
    String time_coverage_start "1987-10-02T13:00:00Z";
    String title "Global Drifter Program hourly drifting buoy collection";
    Float64 Westernmost_Easting -180.0;
  }
}

 

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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