Marine Institute ERDDAP Server
Serving data from the Marine Institute (Ireland)

Brought to you by the Marine Institute(Ireland)

Make A Graph

Dataset Title:	MESTECH Multiparameter Sonde data
Institution:	Dublin City University (Dataset ID: mestech)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| Data Access Form

To work correctly, this web page requires that JavaScript be enabled in your browser. Please:
1) Enable JavaScript in your browser:
      • Chrome: "Settings : Advanced : Privacy and security : Site Settings : JavaScript"
      • Firefox: (it should be always on!)"
      • Opera: "Settings : Websites : JavaScript"
      • Safari: "Safari : Preferences : Security : Enable JavaScript"
2) Reload this web page.

Graph Type:

X Axis:

Y Axis:

Color:

Constraints

Optional
Constraint #1

Optional
Constraint #2

Server-side Functions

distinct()

Hover here to see a list of options. Click on an option to select it.

Graph Settings

Marker Type:

Size:

Color:

Color Bar:

Continuity:

Scale:

Minimum:

Maximum:

N Sections:

Draw land mask:

Y Axis Minimum:

Maximum:

(Please be patient. It may take a while to get the data.)

Optional:
Then set the File Type: (File Type information)
and

or view the URL:
(Documentation / Bypass this form

)

Click on the map to specify a new center point.

Zoom:

[The graph you specified. Please be patient.]

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 {
  instrument_id {
    String ioos_category "Identifier";
    String long_name "Instrument Id";
  }
  time {
    String _CoordinateAxisType "Time";
    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 units "seconds since 1970-01-01T00:00:00Z";
  }
  battery {
    String ioos_category "Unknown";
    String long_name "Battery Voltage";
    String units "V";
  }
  clock_date {
    String ioos_category "Time";
    String long_name "Clock Date";
  }
  clock_time {
    String ioos_category "Time";
    String long_name "Clock Time";
  }
  conductivity {
    String ioos_category "Unknown";
    String long_name "Conductivity";
    String units "microSiemens/cm";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    String axis "Z";
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "OceanDepth";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  dissolved_oxygen {
    String ioos_category "Dissolved O2";
    String long_name "dissolved_oxygen";
    String units "mg/l";
  }
  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 standard_name "longitude";
    String units "degrees_east";
  }
  ph {
    Float64 colorBarMaximum 9.0;
    Float64 colorBarMinimum 6.0;
    String ioos_category "Salinity";
    String long_name "Sea Water Ph Reported On Total Scale";
    String standard_name "sea_water_ph_reported_on_total_scale";
    String units "pH";
  }
  ph_mv {
    String ioos_category "Salinity";
    String long_name "Sea Water pH mV";
    String units "mV";
  }
  salinity {
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    String ioos_category "Salinity";
    String long_name "Sea Water Practical Salinity";
    String standard_name "sea_water_practical_salinity";
    String units "ppt";
  }
  site_id {
    String ioos_category "Identifier";
    String long_name "Site Id";
  }
  SeaTemperature {
    String ioos_category "Temperature";
    String long_name "Sea Surface Temperature";
    String units "degree_C";
  }
  turbidity {
    String ioos_category "Unknown";
    String long_name "Turbidity";
    String units "NTU";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Point";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "Dublin City University";
    String creator_url "http://www.mestech.ie";
    String defaultDataQuery "&time>=now-1day";
    String defaultGraphQuery "longitude,latitude,SeaTemperature&time>=now-1day&.marker=5|5";
    String featureType "Point";
    String geospatial_lat_units "degrees_north";
    String geospatial_lon_units "degrees_east";
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2025-10-25T10:05:50Z (source database)
2025-10-25T10:05:50Z https://erddap.marine.ie/tabledap/mestech.das";
    String infoUrl "http://www.mestech.ie";
    String institution "Dublin City University";
    String keywords "battery, chemistry, city, clock, clock_date, clock_time, cond, data, date, density, depth, do_mgl, dublin, Earth Science > Oceans > Ocean\\n\\t\\t\\t\\tChemistry > pH, Earth Science > Oceans > Salinity/Density > Salinity, identifier, instrument, instrument_id, latitude, longitude, mestech, mgl, multiparameter, ocean, oceans, ph_mv, practical, reported, salinity, scale, sea, sea_water_ph_reported_on_total_scale, sea_water_practical_salinity, seawater, site, site_id, sonde, temperature, time, total, turbidity, university, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "Creative Commons Attribution 4.0 (https://creativecommons.org/licenses/by/4.0/)";
    String sourceUrl "(source database)";
    String standard_name_vocabulary "CF Standard Name Table v29";
    String subsetVariables "instrument_id";
    String summary "Environmental Sensors. Dublin City University data from a local source.";
    String title "MESTECH Multiparameter Sonde data";
  }
}

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.

ERDDAP, Version 2.14
Disclaimers | Privacy Policy | Contact