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Dataset Title:  [Chesapeake Bay Nutrients 2021] - Nutrients from CTD casts conducted on R/V
Hugh R. Sharp cruise HRS2110 in the Chesapeake Bay during August 2021 (Nitrite
Oxidation in Oxygen Minimum Zones)
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_896158_v1)
Information:  Summary ? | License ? | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 Cast (unitless) ?          2    19
 Station (unitless) ?          "CB1.25"    "CB3"
 Date (unitless) ?          "2021-08-04"    "2021-08-10"
 Latitude (decimal degrees) ?          37.27022    39.13996
 Longitude (decimal degrees) ?          -76.43984    -76.09256
 Depth (meters (m)) ?          3.92    27.4
 NH4 (micromolar (uM)) ?          0.0    10.803
 NH4_stdev (micromolar (uM)) ?          0.005    0.698
 NO2 (micromolar (uM)) ?          0.0    4.68
 NO2_stdev (micromolar (uM)) ?          0.0    1.237
 NO3 (micromolar (uM)) ?          0.0    2.115
 NO3_stdev (micromolar (uM)) ?          0.0    0.851
 Urea (micromolar (uM)) ?          0.115    0.559
 Urea_stdv (micromolar (uM)) ?          0.0    0.138
 
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File type: (more information)

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Cast {
    Int32 actual_range 2, 19;
    String long_name "Cast";
    String units "unitless";
  }
  Station {
    String long_name "Station";
    String units "unitless";
  }
  Date {
    String long_name "Date";
    String units "unitless";
  }
  Latitude {
    Float32 actual_range 37.27022, 39.13996;
    String long_name "Latitude";
    String units "decimal degrees";
  }
  Longitude {
    Float32 actual_range -76.43984, -76.09256;
    String long_name "Longitude";
    String units "decimal degrees";
  }
  Depth {
    Float32 actual_range 3.92, 27.4;
    String long_name "Depth";
    String units "meters (m)";
  }
  NH4 {
    Float32 actual_range 0.0, 10.803;
    String long_name "Nh4";
    String units "micromolar (uM)";
  }
  NH4_stdev {
    Float32 actual_range 0.005, 0.698;
    String long_name "Nh4_stdev";
    String units "micromolar (uM)";
  }
  NO2 {
    Float32 actual_range 0.0, 4.68;
    String long_name "No2";
    String units "micromolar (uM)";
  }
  NO2_stdev {
    Float32 actual_range 0.0, 1.237;
    String long_name "No2_stdev";
    String units "micromolar (uM)";
  }
  NO3 {
    Float32 actual_range 0.0, 2.115;
    String long_name "No3";
    String units "micromolar (uM)";
  }
  NO3_stdev {
    Float32 actual_range 0.0, 0.851;
    String long_name "No3_stdev";
    String units "micromolar (uM)";
  }
  Urea {
    Float32 actual_range 0.115, 0.559;
    String long_name "Urea";
    String units "micromolar (uM)";
  }
  Urea_stdv {
    Float32 actual_range 0.0, 0.138;
    String long_name "Urea_stdv";
    String units "micromolar (uM)";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_url "https://www.bco-dmo.org/";
    String doi "10.26008/1912/bco-dmo.896158.1";
    String history 
"2024-11-21T09:00:35Z (local files)
2024-11-21T09:00:35Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_896158_v1.html";
    String infoUrl "https://www.bco-dmo.org/dataset/896158";
    String institution "BCO-DMO";
    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 sourceUrl "(local files)";
    String summary "This dataset includes nutrient data from R/V Hugh R. Sharp cruise HRS2110 in the Chesapeake Bay during August 2021.";
    String title "[Chesapeake Bay Nutrients 2021] - Nutrients from CTD casts conducted on R/V Hugh R. Sharp cruise HRS2110 in the Chesapeake Bay during August 2021 (Nitrite Oxidation in Oxygen Minimum Zones)";
  }
}

 

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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