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Dataset Title:  Air Gap Subscribe RSS
Institution:  NOAA NOS CO-OPS (Center for Operational Oceanographic Products and Services)   (Dataset ID: IOOS_Air_Gap)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background | Data Access Form
 
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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:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  STATION_ID {
    String cf_role "timeseries_id";
    String comment "To view the station id listing go to: https://opendap.co-ops.nos.noaa.gov/stations/index.jsp";
    String ioos_category "Identifier";
    String long_name "REQUIRED 7-character Station ID surrounded in double quotes";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  BEGIN_DATE {
    String comment "Examples: "20040321" OR "20030712 19:02"";
    String ioos_category "Time";
    String long_name "REQUIRED 8- to 14-character Begin Date (yyyymmdd hh:mi) surrounded in double quotes";
  }
  END_DATE {
    String comment "Up to one month";
    String ioos_category "Time";
    String long_name "REQUIRED 8- to 14-character End Date (yyyymmdd hh:mi) surrounded in double quotes";
  }
  DCP {
    String comment "DCP number";
    String ioos_category "Identifier";
    String long_name "1-character DCP number surrounded in double quotes";
  }
  SENSOR_ID {
    String comment "Sensor ID: Q1= Air Gap, A1 - Acoustic WL   B1 - Backup WL   N1 - Pressure WL   NT - Pressure WL   V1 - SAE WL   Y1 - Microwave WL   Z1 - Generic WL   T1 - Pressure WL   X1 - ADR WL";
    String ioos_category "Identifier";
    String long_name "2-character Sensor ID surrounded in double quotes";
  }
  time {
    String _CoordinateAxisType "Time";
    String axis "T";
    String comment "Converted UTC date time stamp (E.g. 2016-10-06T14:12:00Z)";
    String ioos_category "Time";
    String long_name "The date time stamp";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  AIR_GAP {
    Float64 colorBarMaximum 2.0;
    Float64 colorBarMinimum -2.0;
    String comment "Vertical distance between water surface and an overhead hazard";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Sea Level";
    String long_name "vertical_navigation_clearance_above_waterway_surface";
    String standard_name "vertical_navigation_clearance_above_waterway_surface";
    String units "meters";
  }
  AIR_GAP_ADJ {
    Float64 colorBarMaximum 2.0;
    Float64 colorBarMinimum -2.0;
    String comment "The air gap value is adjusted to account for the lowest obstruction on the bridge that will affect vessel traffic. Since the sensor is not located at the lowest point on the bridge, it must be adjusted to reflect the true distance from the water level to the lowest obstruction";
    String coverage_content_type "physicalMeasurement";
    String ioos_category "Sea Level";
    String long_name "vertical_navigation_clearance_above_waterway_surface";
    String standard_name "vertical_navigation_clearance_above_waterway_surface";
    String units "meters";
  }
  SIGMA {
    String comment "Standard deviation of 1 second samples used to compute the water level height, meters";
    String coverage_content_type "qualityInformation";
    String ioos_category "Sea Level";
    String long_name "Standard deviation of samples used to compute the air gap";
    String standard_name "vertical_navigation_clearance_above_waterway_surface standard_error";
    String units "meters";
  }
  OUTLIER_FLAG {
    String flag_meanings "below_tolerance_limit tolerance_limit_exceeded";
    Byte flag_values 0, 1;
    String ioos_category "Quality";
    String long_name "Inferred: A flag that indicates that the value is an outlier";
  }
  ROFC_FLAG {
    String flag_meanings "below_tolerance_limit tolerance_limit_exceeded";
    Byte flag_values 0, 1;
    String ioos_category "Quality";
    String long_name "Inferred: A flag that indicates that rate of change was too high";
  }
  FLAT_FLAG {
    String flag_meanings "below_tolerance_limit tolerance_limit_exceeded";
    Byte flag_values 0, 1;
    String ioos_category "Quality";
    String long_name "Inferred: A flag that indicates that the vaues did not change for some time";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "STATION_ID,BEGIN_DATE,END_DATE";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "COOPS.IOOS@noaa.gov";
    String creator_name "NOAA NOS COOPS";
    String creator_url "https://tidesandcurrents.noaa.gov/";
    String featureType "TimeSeries";
    String geospatial_lat_units "degrees_north";
    String geospatial_lon_units "degrees_east";
    String history 
"2020-09-30T09:19:47Z (source database)
2020-09-30T09:19:47Z https://opendap.co-ops.nos.noaa.gov/tabledap/IOOS_Air_Gap.das";
    String infoUrl "https://opendap.co-ops.nos.noaa.gov/";
    String institution "NOAA NOS CO-OPS (Center for Operational Oceanographic Products and Services)";
    String keywords "6-minute, amplitude, co-ops, coastal, collection, data, date, Earth Science > Oceans > Coastal Processes > Air Gap, Earth Science > Oceans > Sea Surface Topography > Sea Surface Height, Earth Science > Oceans > Tides > Tidal Height, geocentric, height, identifier, level, minute, name, noaa, nos, ocean, oceans, ops, platform, preliminary, processes, sea, sea level, seawater, sensor, station, surface, tidal, tide, tides, time, topography, water, water_surface_height_above_reference_datum";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "The information on government servers are in the public domain, unless specifically annotated otherwise, and may be used freely by the public. Before using information obtained from this server, special attention should be given to the date and time of the data and products being displayed. This information shall not be modified in content and then presented as official government material.";
    String sourceUrl "(source database)";
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "These raw data have not been subjected to the National Ocean Service's quality control or quality assurance procedures and do not meet the criteria and standards of official National Ocean Service data. They are released for limited public use as preliminary data to be used only with appropriate caution.";
    String title "Air Gap";
  }
}

 

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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