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Dataset Title:  Churchill snow geophysical data - point measurements Subscribe RSS
Institution:  Centre for Earth Observation Science   (Dataset ID: snow_pit_point_data_7bac_1649_ed04)
Range: time = 2012-12-08T13:30:00Z to 2021-12-13T19:52:00Z
Information:  Summary ? | License ? | Metadata | Background (external link) | Data Access Form | Files
 
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[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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.3549734e+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 {
    String ioos_category "Location";
    String long_name "Depth";
    String standard_name "depth";
  }
  Depth_from_snow_ice_interface_result_value_qualifier {
    String ioos_category "Location";
    String long_name "Depth";
    String standard_name "depth";
  }
  Mass_of_snow {
    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 {
    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 {
    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 {
    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 {
    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 0.024, 13.11;
    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 history 
"2024-06-14T14:29:52Z (local files)
2024-06-14T14:29:52Z http://CanWINerddap.ad.umanitoba.ca/tabledap/snow_pit_point_data_7bac_1649_ed04.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, 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, Depth_from_snow_ice_interface_result_value_qualifier, distribution, earth, Earth Science > Cryosphere > Snow/Ice > Snow Density, Earth Science > Oceans > Salinity/Density > Salinity, Earth Science > Terrestrial Hydrosphere > Snow/Ice > Snow Density, hydrosphere, ice, ice distribution, local, mass, Mass_of_snow, Mass_of_snow_result_value_qualifier, ocean, oceans, practical, qualifier, result, salinity, Salinity_result_value_qualifier, science, sea, sea_water_practical_salinity, seawater, snow, snow_density, Snow_density_result_value_qualifier, source, 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 summary "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 "2012-12-08T13:30:00Z";
    String title "Churchill snow geophysical data - point measurements";
  }
}

 

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.

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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