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Dataset Title:  "Trajectory - R4.x260.204.0001 - drifter_10_mainpass_shoal_west - 30.2N, 88.
16W - 2015-04-09"
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Institution:  DISL   (Dataset ID: R4_x260_204_0001_drifter_10_mainpass_shoal_west)
Range: longitude = -88.161835 to -88.086006°E, latitude = 30.19817 to 30.245134°N, time = 2015-04-09T11:16:19Z to 2015-05-09T10:29:01Z
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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 {
  trajectory {
    Int16 _FillValue -32767;
    String cf_role "trajectory_id";
    String ioos_category "Identifier";
    String long_name "Drifter 10 Mainpass Shoal West";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.428578179e+9, 1.431167341e+9;
    String axis "T";
    String calendar "gregorian";
    Float64 colorBarMaximum 1.432e+9;
    Float64 colorBarMinimum 1.428e+9;
    String coverage_content_type "physicalMeasurement";
    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 1.431167341e+9;
    Float64 valid_min 1.428578179e+9;
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 _FillValue -999.99;
    Float64 actual_range 30.198169, 30.245134;
    String axis "Y";
    String axis_name "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 30.245134;
    Float64 valid_min 30.198169;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 _FillValue -999.99;
    Float64 actual_range -88.161834, -88.086006;
    String axis "X";
    String axis_name "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max -88.086006;
    Float64 valid_min -88.161834;
  }
  satelliteNumber {
    Int16 actual_range 6, 12;
    Float64 colorBarMaximum 100.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "referenceInformation";
    String ioos_category "Identifier";
    String long_name "satellite number";
    String standard_name "satellite_number";
  }
  drifterSpeed {
    Float64 _FillValue -999.99;
    Float64 actual_range 0.01, 1.79;
    Float64 colorBarMaximum 0.5;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Currents";
    String long_name "current speed";
    String standard_name "sea_water_speed";
    String units "knots";
    Float64 valid_max 1.79;
    Float64 valid_min 0.01;
  }
  temperature {
    Float64 _FillValue -999.99;
    Float64 actual_range 25.35, 31.24;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Temperature";
    String long_name "Temperature";
    String ncei_name "Temperature";
    String platform "Drifter";
    String source "in situ measuremnts";
    String standard_name "sea_water_temperature";
    String units "degree_C";
    Float64 valid_max 31.24;
    Float64 valid_min 25.35;
  }
  conductivity {
    Float64 _FillValue -999.99;
    Float64 actual_range 19520.0, 41030.0;
    Float64 colorBarMaximum 40.0;
    Float64 colorBarMinimum 30.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Salinity";
    String long_name "Conductivity";
    String ncei_name "Conductivity";
    String platform "Drifter";
    String source "in situ measuremnts";
    String standard_name "sea_water_electrical_conductivity";
    String units "uS";
    Float64 valid_max 41030.0;
    Float64 valid_min 19520.0;
  }
  salinity {
    Float64 _FillValue -999.99;
    Float64 actual_range 11.59, 26.25;
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Salinity";
    String long_name "Salinity";
    String ncei_name "Salinity";
    String platform "Drifter";
    String source "in situ measuremnts";
    String standard_name "sea_water_practical_salinity";
    String units "PSU";
    Float64 valid_max 26.25;
    Float64 valid_min 11.59;
  }
  TDM {
    Float64 _FillValue -999.99;
    Float64 actual_range 10542.0, 22157.0;
    Float64 colorBarMaximum 25000.0;
    Float64 colorBarMinimum 10000.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String instrument "Davis drifters";
    String ioos_category "Unknown";
    String long_name "Total Dissolved Matter(TDM) concentration";
    String platform "Drifter";
    String standard_name "mass_concentration_of_total_dissolved_matter";
    String units "mg l-1";
    Float64 valid_max 22157.0;
    Float64 valid_min 10542.0;
  }
  specificGravity {
    Float64 _FillValue -999.99;
    Float64 actual_range 11.59, 26.25;
    Float64 colorBarMaximum 30.0;
    Float64 colorBarMinimum 10.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "crs";
    String ioos_category "Unknown";
    String long_name "specific gravity";
    String platform "Drifter";
    String standard_name "specific_gravity";
    Float64 valid_max 26.25;
    Float64 valid_min 11.59;
  }
  platform {
    String ioos_category "Unknown";
    String long_name "Drifter";
    String ncei_code "Drifter";
  }
  instrument {
    String ioos_category "Unknown";
    String long_name "Davis drifters";
  }
  crs {
    Int32 _FillValue -2147483647;
    String epsg_code "EPSG:4326";
    String grid_mapping_name "latitude_longitude";
    Float64 inverse_flattening 298.257223563;
    String ioos_category "Unknown";
    String long_name "CRS";
    Float64 longitude_of_prime_meridian 0.0;
    Float64 semi_major_axis 6378137.0;
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Trajectory";
    String cdm_trajectory_variables "time, latitude, longitude, satelliteNumber, drifterSpeed, temperature, conductivity, salinity, TDM, specificGravity";
    String contributor_email "briandz@disl.org";
    String contributor_institution "Dauphin Island Sea Lab (DISL)";
    String contributor_name "Brian Dzwonkowski";
    String contributor_phone "+1-251-861-2141 x7563";
    String Conventions "CF-1.6, ACDD-1.3, COARDS";
    String Country "USA";
    String creator_email "j.davis@usm.edu";
    String creator_institution "University of Southern Mississippi/ Department of Marine Science";
    String creator_name "James Davis";
    String creator_phone "+1-228-688-3177";
    String creator_role "Applications Programmer";
    String creator_type "person";
    String creator_url "https://data.gulfresearchinitiative.org/data/R4.x260.204:0001";
    String date_created "2020-01-15T16:15:21Z";
    String date_issued "2020-01-15T16:15:21Z";
    String date_metadata_modified "2020-01-15T16:15:21Z";
    String date_modified "2020-01-15T16:15:21Z";
    Float64 Easternmost_Easting -88.086006;
    String featureType "Trajectory";
    String geospatial_bounds "POLYGON ((30.260 -88.177, 30.250 -87.99, 30.09 -87.99, 30.09 -88.177, 30.260 -88.177))";
    String geospatial_bounds_crs "EPSG:4326";
    String geospatial_bounds_vertical_crs "EPSG:5831";
    Float64 geospatial_lat_max 30.245134;
    Float64 geospatial_lat_min 30.198169;
    Float64 geospatial_lat_resolution -1.6913137114142e-5;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -88.086006;
    Float64 geospatial_lon_min -88.161834;
    Float64 geospatial_lon_resolution -4.297200287150069e-5;
    String geospatial_lon_units "degrees_east";
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"datestr(now,30)
2025-01-18T18:21:38Z (local files)
2025-01-18T18:21:38Z https://erddap.griidc.org/tabledap/R4_x260_204_0001_drifter_10_mainpass_shoal_west.das";
    String id "Drifters_mainpass_20150904";
    String infoUrl "https://data.gulfresearchinitiative.org/data/R4.x260.204:0001";
    String institution "DISL";
    String instrument "drifters";
    String instrument_vocabulary "GCMD Science Keywords Version 8.6";
    String keywords "2015-04-09, 2015/09/04, 30.2n, 88.16w, bay, circulation, concentration, conductivity, crs, ctd data, current, currents, data, dauphin, davis, density, disl, dissolved, drifter, drifters, drifterSpeed, earth, Earth Science > Oceans > Ocean Circulation > Ocean Currents, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Conductivity, Earth Science > Oceans > Salinity/Density > Salinity, electrical, gravity, identifier, instrument, island, lab, latitude, longitude, main, main pass, mainpass, mass, mass_concentration_of_total_dissolved_matter, matter, mobile, number, ocean, oceans, pass, platform, practical, r4.x260.204.0001, release, salinity, satellite, satellite_number, satelliteNumber, science, sea, sea_water_electrical_conductivity, sea_water_practical_salinity, sea_water_speed, sea_water_temperature, seawater, shoal, specific, specific_gravity, specificGravity, speed, tdm, temperature, time, total, trajectory, velocity, water, west";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "Freely Distributed";
    String metadata_link "https://data.gulfresearchinitiative.org/data/R4.x260.204:0001";
    Float64 Northernmost_Northing 30.245134;
    String platform "Drifter";
    String platform_vocabulary "GCMD Science Keywords Version 8.6";
    String processing_level "Geophysical units from raw data";
    String product_version "v.0";
    String program "Gulf Of Mexico Reseach Initiative (GOMRI)";
    String project "Consortium for Oil Spill Exposure Pathways in Coastal River-Dominated Ecosystems (CONCORDE)";
    String publisher_email "griidc@gomri.org";
    String publisher_institution "Gulf of Mexico Research Initiative Information and Data (GRIIDC)";
    String publisher_name "Gulf of Mexico Research Initiative Information and Data (GRIIDC)";
    String publisher_phone "+1-301-713-3277";
    String publisher_type "institution";
    String publisher_udi "R4.x260.204:0001";
    String publisher_url "https://data.gulfresearchinitiative.org";
    String references "data.gomri.org";
    String sea_name "Gulf of Mexico, Mississippi Bight, Mobile Bay";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 30.198169;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "time, latitude, longitude, satelliteNumber, drifterSpeed, temperature, conductivity, salinity, TDM, specificGravity";
    String summary "Drifter data at Main Pass, Mobile Bay Release 1 (2015/09/04). At the mouth of Mobile Bay (Main pass), a Lagrangian experiment was conducted using surface drifters on 09/04/2015. It quantified the flow patterns associated with the ebb tidal plume exiting from Mobile Bay.";
    String time_coverage_duration "P0Y0M29DT23H12M41S";
    String time_coverage_end "2015-05-09T10:29:01Z";
    String time_coverage_start "2015-04-09T11:16:19Z";
    String title "\"Trajectory - R4.x260.204.0001 - drifter_10_mainpass_shoal_west - 30.2N, 88.16W - 2015-04-09\"";
    Float64 Westernmost_Easting -88.161834;
  }
}

 

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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