NOAA PolarWatch ERDDAP
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Dataset Title:  PolarWatch ERDDAP Data Usage Subscribe RSS
Institution:  NOAA/NESDIS/CoastWatch/PolarWatch   (Dataset ID: polarwatch_datause_monthly)
Information:  Summary ? | License ? | Metadata | Background | Subset | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ? 		Optional
Constraint #2 ? 		   Minimum ?
   or a List of Values ? 		   Maximum ?
 
 dataset_id (ERDDAP Dataset ID) ?      
   - +  ?
 data_volume (Total Monthly Data Volume, Mb) ?          0    282025
 requests ?          0    361817
 nc_req ?          0    20095
 dods_req (Monthly OpenDAP Requests) ?          0    95995
 text_req ?          0    324584
 metadata_req (Monthly Requests for Metadata) ?          0    2213
 graph_req (Monthly Requests for Graphics) ?          0    44427
 json_req ?          0    28981
 mat_req ?          0    17
 images_req (Monthly Requests for Images) ?          0    2835
 file_downloads_req ?          0    0
 other_req ?          0    0
 nc_volume (Kb) ?          0.0    2.563168E8
 dods_volume (Kb) ?          0.0    7718136.0
 text_volume (Kb) ?          0.0    7.3614464E7
 metadata_volume (Kb) ?          0.0    898905.5
 graph_volume (Kb) ?          0.0    2862833.0
 json_volume (Kb) ?          0.0    2568613.0
 mat_volume (Kb) ?          0.0    1093434.0
 images_volume (Kb) ?          0.0    77974.86
 file_downloads_volume (Kb) ?          0.0    0.0
 other_size (Kb) ?          0.0    0.0
 requests_redirect (Total Redirected Requests) ?          0    494521
 nc_req_redirect ?          0    27821
 dods_req_redirect (Redirected Dods Requests) ?          0    282
 text_req_redirect ?          0    2070
 metadata_req_redirect ?          0    2060
 graph_req_redirect ?          0    0
 json_req_redirect ?          0    52382
 mat_req_redirect ?          0    20
 images_req_redirect ?          0    20846
 file_download_req_redirect ?          0    455964
 other_req_redirect ?          0    136
 unique_visitors ?          1    358
 time_epoch ?          1.6106976E9    1.710486E9
 time (UTC) ?      
   - +  ?
  < slider >
 
Server-side Functions ?
 distinct() ?
? ("Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.Hover here to see a list of options. Click on an option to select it.")

File type: (more information)

(Documentation / Bypass this form ? )
 
(Please be patient. It may take a while to get the data.)


 

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  dataset_id {
    String ioos_category "Identifier";
    String long_name "ERDDAP Dataset ID";
  }
  data_volume {
    Float64 _FillValue -999;
    Float64 actual_range 0, 282025;
    String ioos_category "Unknown";
    String long_name "Total Monthly Data Volume";
    String units "Mb";
  }
  requests {
    Int32 _FillValue -999;
    Int32 actual_range 0, 361817;
    String ioos_category "Unknown";
    String long_name "Total Monthly Requests for Data";
  }
  nc_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 20095;
    String ioos_category "Unknown";
    String long_name "Monthly Requests for Data in NetCDF Format";
  }
  dods_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 95995;
    String ioos_category "Unknown";
    String long_name "Monthly OpenDAP Requests";
  }
  text_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 324584;
    String comment "File type include CSV, ASCII, TXT, tab-separated, and html files";
    String ioos_category "Unknown";
    String long_name "Monthly Requests for Data in Text Format";
  }
  metadata_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 2213;
    String ioos_category "Unknown";
    String long_name "Monthly Requests for Metadata";
  }
  graph_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 44427;
    String ioos_category "Unknown";
    String long_name "Monthly Requests for Graphics";
  }
  json_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 28981;
    String ioos_category "Unknown";
    String long_name "Monthly Requests for Data in JSON Format";
  }
  mat_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 17;
    String ioos_category "Unknown";
    String long_name "Monthly Requests for Data in MATLAB Format";
  }
  images_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 2835;
    String ioos_category "Unknown";
    String long_name "Monthly Requests for Images";
  }
  file_downloads_req {
    Int16 _FillValue -999;
    Int16 actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Monthly Requests to Download Tiles";
  }
  other_req {
    Int32 _FillValue -999;
    Int32 actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Monthly Requests Data in Other Formats";
  }
  nc_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 2.563168e+8;
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume in NetCDF Format";
    String units "Kb";
  }
  dods_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 7718136.0;
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume in Dods Format";
    String units "Kb";
  }
  text_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 7.3614464e+7;
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume in Text Format";
    String units "Kb";
  }
  metadata_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 898905.5;
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume for Metadata";
    String units "Kb";
  }
  graph_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 2862833.0;
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume for Graphs";
    String units "Kb";
  }
  json_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 2568613.0;
    String ioos_category "Unknown";
    String long_name 
"Monthly Data Volume in Json
            format";
    String units "Kb";
  }
  mat_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 1093434.0;
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume in MATLAB Format";
    String units "Kb";
  }
  images_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 77974.86;
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume for Images";
    String units "Kb";
  }
  file_downloads_volume {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 0.0;
    String comment "FTP-like file downloads";
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume for Whole File Downloads Size";
    String units "Kb";
  }
  other_size {
    Float32 _FillValue -999.0;
    Float32 actual_range 0.0, 0.0;
    String ioos_category "Unknown";
    String long_name "Monthly Data Volume Other File Types";
    String units "Kb";
  }
  requests_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 494521;
    String ioos_category "Unknown";
    String long_name "Total Redirected Requests";
  }
  nc_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 27821;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for NetCDF Files";
  }
  dods_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 282;
    String ioos_category "Unknown";
    String long_name "Redirected Dods Requests";
  }
  text_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 2070;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for Text Files";
  }
  metadata_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 2060;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for Metadata";
  }
  graph_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 0;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for Graphs";
  }
  json_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 52382;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for JSON Files";
  }
  mat_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 20;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for MATLAB Files";
  }
  images_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 20846;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for Images";
  }
  file_download_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 455964;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for File Downloads";
  }
  other_req_redirect {
    Int32 _FillValue -999;
    Int32 actual_range 0, 136;
    String ioos_category "Unknown";
    String long_name "Redirected Requests for Other File Types";
  }
  unique_visitors {
    Int16 _FillValue -999;
    Int16 actual_range 1, 358;
    String ioos_category "Unknown";
    String long_name "Unique Visitors";
  }
  time_epoch {
    Float64 _FillValue -999.0;
    Float64 actual_range 1.6106976e+9, 1.710486e+9;
    String ioos_category "Time";
    String long_name "Time Epoch";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.6106688e+9, 1.7104608e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    String source_name "time_iso";
    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";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String history 
"2024-05-01T02:54:52Z (local files)
2024-05-01T02:54:52Z https://polarwatch.noaa.gov/erddap/tabledap/polarwatch_datause_monthly.html";
    String infoUrl "https://polarwatch.noaa.gov/";
    String institution "NOAA/NESDIS/CoastWatch/PolarWatch";
    String keywords "data, dods, dods_req, dods_req_rd, dods_size, downloads, epoch, file, file_dl_req_rd, file_downloads_req, file_downloads_size, file_size, graph, graph_req, graph_req_rd, graph_size, identifier, images, images_req, images_req_rd, images_size, iso, json, json_req, json_req_rd, json_size, local, mat, mat_req, mat_req_rd, mat_size, metadata, metadata_req, metadata_req_rd, metadata_size, meteorology, nc_req, nc_req_rd, nc_size, other_req, other_req_rd, other_size, req, requests, requests_rd, size, source, text, text_req, text_req_rd, text_size, time, time_epoch, unique, unique_visitors, visitors";
    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 standard_name_vocabulary "CF Standard Name Table v70";
    String subsetVariables "dataset_id, time";
    String summary "Data usage extracted from the PolarWatch ERDDAP usage logs.";
    String testOutOfDate "now-115days";
    String time_coverage_end "2024-03-15T00:00:00Z";
    String time_coverage_start "2021-01-15T00:00:00Z";
    String title "PolarWatch ERDDAP Data Usage";
  }
}

 

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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