ERDDAP > tabledap > Make A Graph

Dataset Title:	Hakai Oceanography Nutrient Samples, Research
Institution:	Hakai Institute   (Dataset ID: HakaiNutrientSampleResearch)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Subset | Data Access Form

 

Graph Type:  lines linesAndMarkers markers sticks vectors X Axis:  latitude longitude precise_latitude precise_longitude time preserved depth line_out_depth pressure_transducer_depth filtered volume nh4 no2_no3 po4 sio2 Y Axis:  latitude longitude precise_latitude precise_longitude time preserved depth line_out_depth pressure_transducer_depth filtered volume nh4 no2_no3 po4 sio2 Color:  latitude longitude precise_latitude precise_longitude time preserved depth line_out_depth pressure_transducer_depth filtered volume nh4 no2_no3 po4 sio2   Constraints Optional Constraint #1 Optional Constraint #2 work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log     != =~ <= >= = < >     != =~ <= >= = < >     work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log     != =~ <= >= = < >     != =~ <= >= = < >     work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log     != =~ <= >= = < >     != =~ <= >= = < >     work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log     != =~ <= >= = < >     != =~ <= >= = < >     work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log     != =~ <= >= = < >     != =~ <= >= = < >       Server-side Functions  distinct() orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log work_area organization survey site_id project_specific_id sample_id source latitude longitude precise_latitude precise_longitude collection_method time preserved depth line_out_depth pressure_transducer_depth filtered filter_type volume lab_technician nh4 nh4_flag no2_no3 no2_no3_flag po4 po4_flag sio2 sio2_flag analyzing_lab row_flag metadata_qc_flag quality_level comments quality_log ")   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: .asc .csv .csvp .csv0 .dataTable .das .dds .dods .esriCsv .fgdc .geoJson .graph .help .html .htmlTable .iso19115 .itx .json .jsonlCSV1 .jsonlCSV .jsonlKVP .mat .nc .ncHeader .ncCF .ncCFHeader .ncCFMA .ncCFMAHeader .nccsv .nccsvMetadata .ncoJson .odvTxt .parquet .parquetWMeta .subset .tsv .tsvp .tsv0 .wav .xhtml .kml .smallPdf .pdf .largePdf .smallPng .png .largePng .transparentPng (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 {
  work_area {
    String ioos_category "Unknown";
    String long_name "Work Area";
  }
  organization {
    String ioos_category "Unknown";
    String long_name "Organization";
  }
  survey {
    String ioos_category "Unknown";
    String long_name "Survey";
  }
  site_id {
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Site Id";
  }
  project_specific_id {
    String ioos_category "Identifier";
    String long_name "Project Specific Id";
  }
  sample_id {
    String ioos_category "Identifier";
    String long_name "Hakai Sample ID";
  }
  source {
    String ioos_category "Unknown";
    String long_name "Source";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "long";
    String standard_name "longitude";
    String units "degrees_east";
  }
  precise_latitude {
    String ioos_category "Location";
    String long_name "Precise Latitude";
    String units "degrees_north";
  }
  precise_longitude {
    String ioos_category "Unknown";
    String long_name "Precise Longitude";
    String units "degrees_east";
  }
  collection_method {
    String ioos_category "Unknown";
    String long_name "Collection Method";
  }
  time {
    String _CoordinateAxisType "Time";
    String axis "T";
    String cf_role "profile_id";
    String ioos_category "Time";
    String long_name "Collection Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  preserved {
    String ioos_category "Time";
    String long_name "Preservation Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  line_out_depth {
    String ioos_category "Location";
    String long_name "Line Out Depth";
    String units "m";
  }
  pressure_transducer_depth {
    String ioos_category "Pressure";
    String long_name "Bottle Mounted Pressure Transducer Depth";
    String units "m";
  }
  filtered {
    String _Unsigned "false";
    Byte actual_range 0, 1;
    String ioos_category "Unknown";
    String long_name "Filtered";
  }
  filter_type {
    String ioos_category "Unknown";
    String long_name "Filter Type";
  }
  volume {
    Float64 actual_range 13.0, 13.0;
    String ioos_category "Unknown";
    String long_name "Volume";
  }
  lab_technician {
    String ioos_category "Unknown";
    String long_name "Lab Technician";
  }
  nh4 {
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "Mole Concentration Of Ammonium In Sea Water";
    String standard_name "mole_concentration_of_ammonium_in_sea_water";
    String units "uM";
  }
  nh4_flag {
    String ioos_category "Quality";
    String long_name "Nh4  Flag";
  }
  no2_no3 {
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Dissolved Nutrients";
    String long_name "Mole Concentration Of Nitrate In Sea Water";
    String standard_name "mole_concentration_of_nitrate_in_sea_water";
    String units "uM";
  }
  no2_no3_flag {
    String ioos_category "Quality";
    String long_name "No2 No3 Flag";
  }
  po4 {
    String ioos_category "Dissolved Nutrients";
    String long_name "Mass Concentration Of Phosphate In Sea Water";
    String standard_name "mass_concentration_of_phosphate_in_sea_water";
    String units "uM";
  }
  po4_flag {
    String ioos_category "Quality";
    String long_name "PO4 Flag";
  }
  sio2 {
    String ioos_category "Unknown";
    String long_name "Mass Concentration Of Silicate In Sea Water";
    String standard_name "mass_concentration_of_silicate_in_sea_water";
    String units "uM";
  }
  sio2_flag {
    String ioos_category "Quality";
    String long_name "Sio2 Flag";
  }
  analyzing_lab {
    String ioos_category "Unknown";
    String long_name "Analyzing Lab";
  }
  row_flag {
    String ioos_category "Quality";
    String long_name "Row Flag";
  }
  metadata_qc_flag {
    String ioos_category "Quality";
    String long_name "Metadata Qc Flag";
  }
  quality_level {
    String ioos_category "Quality";
    String long_name "Quality Level";
  }
  comments {
    String ioos_category "Unknown";
    String long_name "Comments";
  }
  quality_log {
    String ioos_category "Quality";
    String long_name "Quality Log";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeriesProfile";
    String cdm_profile_variables "time,precise_latitude, precise_longitude";
    String cdm_timeseries_variables "work_area,organization,latitude,longitude,site_id";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String featureType "TimeSeriesProfile";
    String geospatial_lat_units "degrees_north";
    String geospatial_lon_units "degrees_east";
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2025-06-22T14:40:26Z (source database)
2025-06-22T14:40:26Z https://catalogue.hakai.org/tabledap/HakaiNutrientSampleResearch.das";
    String infoUrl "https://www.hakai.org";
    String institution "Hakai Institute";
    String keywords "action, ammonia, ammonium, analyzed, analyzing, analyzing_lab, area, bout, chemistry, collected, collection, collection_method, comments, concentration, data, date, depth, dissolved, dissolved nutrients, earth, Earth Science > Oceans > Ocean Chemistry > Ammonia, Earth Science > Oceans > Ocean Chemistry > Nitrate, Earth Science > Oceans > Ocean Chemistry > Phosphate, event, event_pk, filter, filter_type, filtered, flag, gather, gather_lat, gather_long, hakai, hakai_id, identifier, installed, is_replicate, lab, lab_technician, latitude, level, line, line_out_depth, local, log, long, longitude, mass, mass_concentration_of_phosphate_in_sea_water, metadata, metadata_qc_flag, method, mole, mole_concentration_of_ammonium_in_sea_water, mole_concentration_of_nitrate_in_sea_water, n02, nh4, nh4_flag, nh4nunfl, nh4nunfl_flag, nitrate, nitrite, no2, no2_no3_flag, no2_no3_ugl, no2_no3_um, no2_no3_units, no3, no3nfilt, no3nfilt_flag, no3nunfl, no3nunfl_flag, nutrients, ocean, oceans, organization, out, phosphate, po4, po4_flag, po4pfilt, po4pfilt_flag, po4punfl, po4punfl_flag, preserved, pressure, pressure_transducer_depth, project, project_specific_id, quality, quality_level, quality_log, replicate, row, row_flag, sampling, sampling_bout, science, sea, seawater, sio2, sio2_flag, site, site_id, source, specific, srp, srp_flag, survey, tdn, tdn_flag, tdp, tdp_flag, technician, time, tn_flag, tp_flag, transducer, type, units, volume, water, work, work_area";
    String keywords_vocabulary "GCMD Science Keywords";
    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 platform "self-propelled small boat";
    String platform_vocabulary "https://vocab.nerc.ac.uk/collection/L06/current/";
    String sourceUrl "(source database)";
    String standard_name_vocabulary "CF Standard Name Table v79";
    String subsetVariables "work_area,organization,survey,site_id,project_specific_id,source,collection_method,filtered,filter_type,volume,nh4_flag,no2_no3_flag,po4_flag,sio2_flag,analyzing_lab,metadata_qc_flag,quality_level";
    String summary "Data from a local source.";
    String title "Hakai Oceanography Nutrient Samples, Research";
  }
}

 

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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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