Make A Graph

Dataset Title:	NAUTILOS - Deep Ocean Radioactivity Sensor - HCMR
Institution:	HCMR (Dataset ID: radioactivity_sensor_hcmr)
Range:	longitude = 20.826805 to 25.124317°E, latitude = 35.39153 to 37.472305°N, depth = 0.0 to 2010.0m, time = 2024-10-11T14:57:20Z to 2024-10-11T14:57:20Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

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Constraints	Optional Constraint #1		Optional Constraint #2

Server-side Functions

distinct()

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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.

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  site {
    String long_name "site";
  }
  counts_of_gamma_ray {
    Int16 _FillValue 32767;
    Int16 actual_range 177, 301;
    String long_name "Counts Of Gamma Ray";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Int16 _FillValue 32767;
    Int16 actual_range 0, 2010;
    String axis "Z";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String source_name "Depth (m)";
    String standard_name "depth";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 35.3915305556, 37.4723055556;
    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";
    Float64 actual_range 20.8268055556, 25.1243166667;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.72865864e+9, 1.72865864e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  time_coverage_duration {
    Int16 _FillValue 32767;
    Int16 actual_range 1440, 5300;
    String long_name "Time Coverage Duration (seconds)";
  }
  time_coverage_resolution {
    Byte _FillValue 127;
    String _Unsigned "false";
    Byte actual_range 100, 120;
    String long_name "Time Coverage Resolution (seconds)";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "salexakis@hcmr.gr,mntoumas@hcmr.gr,tsabaris@hcmr.gr";
    String creator_name "Hellenic Centre for Marine Research (HCMR)";
    String creator_type "Institution";
    String creator_url "www.hcmr.gr, io.hcmr.gr";
    Float64 Easternmost_Easting 25.1243166667;
    Float64 geospatial_lat_max 37.4723055556;
    Float64 geospatial_lat_min 35.3915305556;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 25.1243166667;
    Float64 geospatial_lon_min 20.8268055556;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 2010.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2025-06-23T05:07:30Z (local files)
2025-06-23T05:07:30Z https://data-nautilos-h2020.eu/tabledap/radioactivity_sensor_hcmr.das";
    String infoUrl "https://nautilos-h2020.eu/";
    String inspire "Environmental monitoring facilities, Oceanographic geographical features, Sea regions";
    String institution "HCMR";
    String institution_country "GR";
    String institution_edmo_code "3051";
    String keywords "marine radioactivity";
    String keywords_vocabulary "radioactivity, gamma-ray emitters, vertical profiles, autonomous ocean sensors, R/V rossete";
    String license "CC-BY 4.0";
    String naming_authority "NAUTILOS";
    Float64 Northernmost_Northing 37.4723055556;
    String platform_type_sdn_name "research vessel";
    String platform_type_sdn_uri "SDN:L06::31";
    String platform_type_sdn_urn "https://vocab.nerc.ac.uk/collection/L06/current/31/";
    String project_code "NAUTILOS";
    String Project_DOI "https://doi.org/10.3030/101000825";
    String project_edmerp "13720";
    String project_id "101000825";
    String project_name "New Approach to Underwater Technologies for Innovative, Low-cost Ocean obServation";
    String project_statement "This project has received funding from the European Unionï¿½s Horizon 2020 research and innovation programme under grant agreement No. 101000825 (NAUTILOS). This output reflects only the authorï¿½s view and the European Union cannot be held responsible for any use that may be made of the information contained therein";
    String sensor_accuracy "4% of TCR readings";
    String sensor_last_calibration "45323";
    String sensor_manufacturer_sdn_name "Hellenic Centre for Marine Research";
    String sensor_manufacturer_sdn_uri "https://vocab.nerc.ac.uk/collection/L35/current/MAN0181/";
    String sensor_manufacturer_sdn_urn "SDN:L35::MAN0181";
    String sensor_nautilos "Deep ocean low-level radioactivity sensor - HCMR";
    String ship_call_sign "SW2204";
    String ship_imo "8834342";
    String ship_name "PHILIA";
    String source "HCMR radioactivity sensor developed in the NAUTILOS project";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 35.3915305556;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Profiles of gamma ray counts collected by the HCMR radioactivity sensor during research cruises of the R/V Philia in Cretan and Ionian Sea";
    String time_coverage_end "2024-10-11T14:57:20Z";
    String time_coverage_start "2024-10-11T14:57:20Z";
    String title "NAUTILOS - Deep Ocean Radioactivity Sensor - HCMR";
    String variables "counts of gamma ray, depth";
    Float64 Westernmost_Easting 20.8268055556;
  }
}

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.

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