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Dataset Title:	Churchill snow geophysical data - depth ranges
Institution:	Centre for Earth Observation Science (Dataset ID: snow_pit_range_data_5276_e582_9692)
Range:	time = 2021-12-02T20:43:00Z to 2021-12-13T19:52:00Z
Information:	Summary \| License \| Metadata \| Background \| Subset \| Data Access Form \| Files

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Server-side Functions

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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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.63847778e+9, 1.63942512e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Date Time";
    String source_name "date_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";
  }
  Depth_from_snow_ice_interface_start {
    Byte actual_range 0, 20;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String ioos_category "Location";
    String long_name "Depth";
    String standard_name "depth";
    String units "cm";
  }
  Depth_from_snow_ice_interface_end {
    Byte actual_range 2, 22;
    Float64 colorBarMaximum 8000.0;
    Float64 colorBarMinimum -8000.0;
    String colorBarPalette "TopographyDepth";
    String ioos_category "Location";
    String long_name "Depth";
    String standard_name "depth";
    String units "cm";
  }
  Mass_of_snow {
    Float32 actual_range 5.4, 31.8;
    String ioos_category "Ice Distribution";
    String long_name "Mass Of Snow";
  }
  Mass_of_snow_result_value_qualifier {
    String ioos_category "Ice Distribution";
    String long_name "Mass Of Snow Result Value Qualifier";
  }
  Bag_mass_to_subtract_or_0 {
    Float32 actual_range -2.4, 24.7;
    String ioos_category "Unknown";
    String long_name "Bag Mass To Subtract Or 0";
  }
  Bag_mass_to_subtract_or_0_result_value_qualifier {
    String ioos_category "Unknown";
    String long_name "Bag Mass To Subtract Or 0 Result Value Qualifier";
  }
  Corrected_mass_of_snow {
    Float32 actual_range 3.4, 66.0;
    String ioos_category "Ice Distribution";
    String long_name "Corrected Mass Of Snow";
  }
  Corrected_mass_of_snow_result_value_qualifier {
    String ioos_category "Ice Distribution";
    String long_name "Corrected Mass Of Snow Result Value Qualifier";
  }
  Cutter_volume {
    Byte actual_range -36, 85;
    String ioos_category "Unknown";
    String long_name "Cutter Volume";
  }
  Cutter_volume_result_value_qualifier {
    String ioos_category "Unknown";
    String long_name "Cutter Volume Result Value Qualifier";
  }
  Snow_density {
    Int16 actual_range -16, 465;
    String ioos_category "Ice Distribution";
    String long_name "Snow Density";
    String standard_name "snow_density";
  }
  Snow_density_result_value_qualifier {
    String ioos_category "Ice Distribution";
    String long_name "Snow Density Result Value Qualifier";
  }
  Temperature {
    String ioos_category "Temperature";
    String long_name "Temperature";
  }
  Temperature_result_value_qualifier {
    String ioos_category "Temperature";
    String long_name "Temperature Result Value Qualifier";
  }
  Salinity {
    Float32 actual_range 0.011, 16.39;
    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 "PSU";
  }
  Salinity_result_value_qualifier {
    String ioos_category "Salinity";
    String long_name "Salinity Result Value Qualifier";
  }
  Comments {
    String ioos_category "Unknown";
    String long_name "Comments";
  }
  Station {
    String ioos_category "Identifier";
    String long_name "Station";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_name "Centre for Earth Observation Science";
    String history 
"2024-04-28T19:49:51Z (local files)
2024-04-28T19:49:51Z http://CanWINerddap.ad.umanitoba.ca/tabledap/snow_pit_range_data_5276_e582_9692.das";
    String infoUrl "https://canwin-datahub.ad.umanitoba.ca/data/dataset/churchill-snow-geophysical-data-2021?__no_cache__=True";
    String institution "Centre for Earth Observation Science";
    String keywords "bag, Bag_mass_to_subtract_or_0, Bag_mass_to_subtract_or_0_result_value_qualifier, centre, churchill, comments, corrected, Corrected_mass_of_snow, Corrected_mass_of_snow_result_value_qualifier, cryosphere, cutter, Cutter_volume, Cutter_volume_result_value_qualifier, data, date, density, depth, Depth_from_snow_ice_interface_end, Depth_from_snow_ice_interface_start, distribution, earth, Earth Science > Cryosphere > Snow/Ice > Snow Density, Earth Science > Oceans > Salinity/Density > Salinity, Earth Science > Terrestrial Hydrosphere > Snow/Ice > Snow Density, geophysical, hydrosphere, ice, ice distribution, mass, Mass_of_snow, Mass_of_snow_result_value_qualifier, observation, ocean, oceans, practical, qualifier, ranges, result, salinity, Salinity_result_value_qualifier, science, sea, sea_water_practical_salinity, seawater, snow, snow_density, Snow_density_result_value_qualifier, subtract, temperature, Temperature_result_value_qualifier, terrestrial, time, value, volume, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "Creative Commons Attribution 4.0 International";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "Mass_of_snow_result_value_qualifier, Bag_mass_to_subtract_or_0, Bag_mass_to_subtract_or_0_result_value_qualifier, Corrected_mass_of_snow_result_value_qualifier, Cutter_volume, Cutter_volume_result_value_qualifier, Snow_density_result_value_qualifier, Temperature, Temperature_result_value_qualifier, Salinity_result_value_qualifier";
    String summary "Churchill snow geophysical data - depth ranges. The data contains the snow geophysical property data collected from both sea ice and lake ice during the Churchill Freeze-up Campaign (December, 2021). The snow geophysical properties include snow salinity, bulk-density and temperature profiles.";
    String time_coverage_end "2021-12-13T19:52:00Z";
    String time_coverage_start "2021-12-02T20:43:00Z";
    String title "Churchill snow geophysical data - depth ranges";
  }
}

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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