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Dataset Title:	Chebeague Island, ME Hohonu tide gauge
Institution:	Gulf of Maine Research Institute (Dataset ID: Hohonu_tide_Chebague_Island_ME)
Range:	longitude = -70.1265 to -70.1265°E, latitude = 43.7163 to 43.7163°N
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Data Access Form \| Files

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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 {
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 43.7163, 43.7163;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -70.1265, -70.1265;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  time {
    String _CoordinateAxisType "Time";
    String axis "T";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "julian day (UT)";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  navd88_meters {
    Float64 _FillValue NaN;
    Float64 actual_range -4.648, 3.456;
    String ancillary_variables "navd88_meters_qartod_gross_range_test navd88_meters_qartod_rate_of_change_test navd88_meters_qartod_flat_line_test navd88_meters_qartod_spike_test";
    String coordinates "latitude longitude";
    String datum "NAVD88";
    String ioos_category "Sea Level";
    String long_name "Sea surface height above geopotential datum";
    String standard_name "sea_surface_height_above_geopotential_datum";
    String units "m";
  }
  navd88_feet {
    Float64 _FillValue NaN;
    Float64 actual_range -15.25, 11.34;
    String coordinates "latitude longitude";
    String datum "NAVD88";
    String ioos_category "Sea Level";
    String long_name "Sea surface height above geopotential datum";
    String units "feet";
  }
  hohonu_forecast_navd88_meters {
    Float64 _FillValue NaN;
    Float64 actual_range -1.85, 1718.831;
    String coordinates "latitude longitude";
    String datum "NAVD88";
    String ioos_category "Sea Level";
    String long_name "Hohonu forecasted Sea surface height above geopotential datum";
    String units "m";
  }
  hohonu_forecast_navd88_feet {
    Float64 _FillValue NaN;
    Float64 actual_range -6.07, 5639.21;
    String coordinates "latitude longitude";
    String datum "NAVD88";
    String ioos_category "Sea Level";
    String long_name "Hohonu forecasted Sea surface height above geopotential datum";
    String units "feet";
  }
  navd88_meters_qartod_gross_range_test {
    Int32 actual_range 1, 9;
    String coordinates "latitude longitude";
    String flag_meanings "GOOD UNKNOWN SUSPECT FAIL MISSING";
    Float64 flag_values 1, 2, 3, 4, 9;
    String ioos_qc_config "{\"suspect_span\": [-2, 2.5], \"fail_span\": [-2.8, 2.8]}";
    String ioos_qc_module "qartod";
    String ioos_qc_target "navd88_meters";
    String ioos_qc_test "gross_range_test";
    String long_name "Gross Range Test Quality Flag";
    String standard_name "gross_range_test_quality_flag";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  navd88_meters_qartod_rate_of_change_test {
    Int32 actual_range 1, 9;
    String coordinates "latitude longitude";
    String flag_meanings "GOOD UNKNOWN SUSPECT FAIL MISSING";
    Float64 flag_values 1, 2, 3, 4, 9;
    String ioos_qc_config "{\"threshold\": 0.001}";
    String ioos_qc_module "qartod";
    String ioos_qc_target "navd88_meters";
    String ioos_qc_test "rate_of_change_test";
    String long_name "Rate of Change Test Quality Flag";
    String standard_name "rate_of_change_test_quality_flag";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  navd88_meters_qartod_spike_test {
    Int32 actual_range 1, 9;
    String coordinates "latitude longitude";
    String flag_meanings "GOOD UNKNOWN SUSPECT FAIL MISSING";
    Float64 flag_values 1, 2, 3, 4, 9;
    String ioos_qc_config "{\"suspect_threshold\": 0.3, \"fail_threshold\": 0.5}";
    String ioos_qc_module "qartod";
    String ioos_qc_target "navd88_meters";
    String ioos_qc_test "spike_test";
    String long_name "Spike Test Quality Flag";
    String standard_name "spike_test_quality_flag";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  navd88_meters_qartod_flat_line_test {
    Int32 actual_range 1, 9;
    String coordinates "latitude longitude";
    String flag_meanings "GOOD UNKNOWN SUSPECT FAIL MISSING";
    Float64 flag_values 1, 2, 3, 4, 9;
    String ioos_qc_config "{\"tolerance\": 0.005, \"suspect_threshold\": 2000, \"fail_threshold\": 3000}";
    String ioos_qc_module "qartod";
    String ioos_qc_target "navd88_meters";
    String ioos_qc_test "flat_line_test";
    String long_name "Flat Line Test Quality Flag";
    String standard_name "flat_line_test_quality_flag";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
  qartod_qc_rollup {
    Int32 actual_range 1, 9;
    String coordinates "latitude longitude";
    String flag_meanings "GOOD UNKNOWN SUSPECT FAIL MISSING";
    Float64 flag_values 1, 2, 3, 4, 9;
    String ioos_qc_module "qartod";
    String ioos_qc_test "qc_rollup";
    String long_name "Aggregate Quality Flag";
    String standard_name "aggregate_quality_flag";
    Int32 valid_max 9;
    Int32 valid_min 1;
  }
 }
  NC_GLOBAL {
    String _NCProperties "version=2,netcdf=4.9.2,hdf5=1.14.3";
    String cdm_data_type "Point";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "hbarnes@gmri.org";
    String creator_name "Hannah Barnes";
    String creator_type "institution";
    String creator_url "https://gmri.org";
    Float64 Easternmost_Easting -70.1265;
    String featureType "Point";
    Float64 geospatial_lat_max 43.7163;
    Float64 geospatial_lat_min 43.7163;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -70.1265;
    Float64 geospatial_lon_min -70.1265;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-09-16T20:13:34Z (local files)
2024-09-16T20:13:34Z http://data.neracoos.org/tabledap/Hohonu_tide_Chebague_Island_ME.das";
    String infoUrl "https://gmri.org/projects/assessing-coastal-flood-risk-maine-communities/";
    String institution "Gulf of Maine Research Institute";
    String keywords "gauge, mean, meter, mllw, MLLW_feet, MLLW_meter, msl, onset, sea, station, Temp, temperature, tide, water level";
    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.";
    Float64 Northernmost_Northing 43.7163;
    String project "NERACOOS";
    String project_url "https://neracoos.org";
    String publisher_email "info@neracoos.org";
    String publisher_phone "(603) 319 1785";
    String publisher_url "https://neracoos.org";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 43.7163;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary 
"There are some things you should know about this station,
but these are not those things.
";
    String testOutOfDate "now-1day";
    String tidal_datum_source "Manual";
    String title "Chebeague Island, ME Hohonu tide gauge";
    Float64 Westernmost_Easting -70.1265;
  }
}

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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