ERDDAP > tabledap > Make A Graph

Dataset Title:	Codar Ocean Currents
Institution:	OFI   (Dataset ID: codar-surface-current)
Range:	longitude = -65.49302 to -61.71158°E, latitude = 42.561676 to 45.0287°N, time = 2015-11-24T18:00:00.000Z to 2023-09-16T04:00:00.000Z
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Subset | Data Access Form | Files

 

Graph Type:  lines linesAndMarkers markers sticks vectors X Axis:  row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1 Y Axis:  row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1 Color:  row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1   Constraints Optional Constraint #1 Optional Constraint #2 row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1     != =~ <= >= = < >     != =~ <= >= = < >     row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1     != =~ <= >= = < >     != =~ <= >= = < >     row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1     != =~ <= >= = < >     != =~ <= >= = < >     row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1     != =~ <= >= = < >     != =~ <= >= = < >     row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1     != =~ <= >= = < >     != =~ <= >= = < >       Server-side Functions  distinct() orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1 row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1 row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1 row time latitude longitude bearing covariance direction range u_comp v_comp u_stddev v_stddev vector_flag velocity x_distance y_distance site_contributors site_contributors_1 ")   Graph Settings Marker Type:  None Plus X Dot Square Filled Square Circle Filled Circle Up Triangle Filled Up Triangle Borderless Filled Square Borderless Filled Circle Borderless Filled Up Triangle  Size:  3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Color:  Color Bar:  BlackBlueWhite BlackGreenWhite BlackRedWhite BlackWhite BlueWhiteRed BlueWideWhiteRed LightRainbow Ocean OceanDepth Rainbow Rainbow2 Rainfall ReverseRainbow RedWhiteBlue RedWhiteBlue2 RedWideWhiteBlue Spectrum Topography TopographyDepth WhiteBlueBlack WhiteGreenBlack WhiteRedBlack WhiteBlack YellowRed KT_algae KT_amp KT_balance KT_curl KT_deep KT_delta KT_dense KT_gray KT_haline KT_ice KT_matter KT_oxy KT_phase KT_solar KT_speed KT_tempo KT_thermal KT_turbid EK80  Continuity:  Continuous Discrete  Scale:  Linear Log    Minimum:   Maximum:   N Sections:  2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Draw land mask:  under over outline off Y Axis Minimum:   Maximum:    Ascending Descending Linear Log   Redraw the Graph (Please be patient. It may take a while to get the data.)   Optional: Then set the File Type: .kml .nccsv .pdf .largePdf .dds .ncCFMAHeader .tsvp .transparentPng .ncCF .geoJson .das .dods .tsv .jsonlKVP .jsonlCSV .nccsvMetadata .esriCsv .mat .ncCFHeader .parquetWMeta .iso19115 .smallPdf .png .largePng .odvTxt .wav .itx .tsv0 .fgdc .smallPng .json .dataTable .csvp .jsonlCSV1 .asc .nc .parquet .ncHeader .ncoJson .htmlTable .xhtml .csv .csv0 .ncCFMA (File Type information) and or view the URL: (Documentation / Bypass this form )

Click on the map to specify a new center point. Zoom:  Time range:  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 second(s) minute(s) hour(s) day(s) month(s) year(s)

 

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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:

• Web page authors can embed a graph of the latest data in a web page using HTML <img> tags.
• Anyone can use ERDDAPs Slide Sorter to build a personal web page that displays graphs with the latest data (or other images or HTML content), each in its own, draggable slide.
   

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  row {
    Int32 _FillValue 2147483647;
    Int32 actual_range 0, 765711;
    String ioos_category "Unknown";
    String long_name "Row";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.448388e+9, 1.6948368e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "times Identifies the center time in year, month, day, hour, minute, second of the data collected in the file.";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00:00.000Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 42.5616743, 45.028701;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name " latitude: is the current vector latitude in fractional degrees with positive North";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -65.49302, -61.7115783;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "longitude: is the current vector longitude in fractional degrees with positive East";
    String standard_name "longitude";
    String units "degrees_east";
  }
  bearing {
    Float64 actual_range 3.6, 360.0;
    String ioos_category "Unknown";
    String long_name "bearing: is the current vector bearing in degrees clockwise from true North from";
  }
  covariance {
    Float64 actual_range -31213.449, 856048.875;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "covariance: is the current vector covariance";
  }
  direction {
    Float64 actual_range 0.0, 360.0;
    Float64 colorBarMaximum 360.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Currents";
    String long_name "direction: is the current vector direction in degrees clockwise from true North.";
  }
  range {
    Float64 actual_range 0.0, 249.7038;
    String ioos_category "Unknown";
    String long_name "range: is the current vector range in km from the origin key.";
  }
  u_comp {
    Float64 actual_range -199.428, 199.592;
    String ioos_category "Unknown";
    String long_name "u_comp: is the current vector u-component standard deviation";
  }
  v_comp {
    Float64 actual_range -199.402, 190.98;
    String ioos_category "Unknown";
    String long_name "v_comp: is the current vector v-component standard deviation.";
  }
  u_stddev {
    Float64 _FillValue 999.0;
    Float64 actual_range 0.06, 757.31;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "u_stddev: no definition currently available";
  }
  v_stddev {
    Float64 _FillValue 999.0;
    Float64 actual_range 0.06, 1130.58;
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Statistics";
    String long_name "v_stddev: is a radial or elliptical standard deviation of current velocity over coverage period. (outdated use ETMP)";
  }
  vector_flag {
    Int32 _FillValue 2147483647;
    Int32 actual_range 0, 2;
    Float64 colorBarMaximum 128.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Quality";
    String long_name " vector_flag: is a vector indicator flag. Indicates status of the vector like near coastline,";
  }
  velocity {
    Float64 actual_range 0.005, 199.957;
    String ioos_category "Currents";
    String long_name "velocity: is the current vector velocity in cm/s. (Negative velocity implies 180deg direction change";
  }
  x_distance {
    Float64 actual_range -204.0, 96.0;
    String ioos_category "Location";
    String long_name "x_distance: is the current vector easting distance in km from the origin key";
  }
  y_distance {
    Float64 actual_range -132.0, 144.0;
    String ioos_category "Location";
    String long_name "y_distance: is the current vector northing distance in km from the origin key";
  }
  site_contributors {
    Float64 actual_range 0.0, 85.0;
    String ioos_category "Unknown";
    String long_name "Site Contributors";
  }
  site_contributors_1 {
    Float64 actual_range 0.0, 61.0;
    String ioos_category "Unknown";
    String long_name "Site Contributors 1";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Point";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creator_name "CEOTR";
    String creator_type "institution";
    String creator_url "https://www.dal.ca/";
    Float64 Easternmost_Easting -61.7115783;
    String featureType "Point";
    Float64 geospatial_lat_max 45.028701;
    Float64 geospatial_lat_min 42.5616743;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -61.7115783;
    Float64 geospatial_lon_min -65.49302;
    String geospatial_lon_units "degrees_east";
    String history 
"2025-12-16T10:08:27Z (local files)
2025-12-16T10:08:27Z http://data.ceotr.ca/tabledap/codar-surface-current.das";
    String infoUrl "https://ceotr.ocean.dal.ca/codar/map";
    String institution "OFI";
    String keywords "applications, bearing, coastal, codar, comp, contributors, covariance, currents, data, direction, distance, dynamics, flag, latitude, longitude, ocean, ofi, quality, radar, range, row, site, site_contributors, site_contributors_1, statistics, stddev, time, timestamp, u, u_comp, u_stddev, v, v_comp, v_stddev, vector, vector_flag, velocity, x_distance, y_distance";
    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 45.028701;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 42.5616743;
    String standard_name_vocabulary "CF Standard Name Table v79";
    String subsetVariables "vector_flag, site_contributors, site_contributors_1";
    String summary "Codar ocean current data. OFI data from a local source.";
    String time_coverage_end "2023-09-16T04:00:00.000Z";
    String time_coverage_start "2015-11-24T18:00:00.000Z";
    String title "Codar Ocean Currents";
    Float64 Westernmost_Easting -65.49302;
  }
}

 

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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 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 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.

 

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