Make A Graph

Dataset Title:	DAUPHIN - 9721rb-a
Institution:	Coastal and Marine Hazards and Resources Program, U.S. Geological Survey (Dataset ID: DAUPHIN_9721rb_a_nc)
Range:	longitude = -88.17518 to -88.17518°E, latitude = 30.25232 to 30.25232°N, time = 2013-07-23T21:25:04Z to 2013-10-03T04:10:12Z
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| 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 {
  station_id {
    String actual_range 
"DAUPHIN_9721rb_a_nc
DAUPHIN_9721rb_a_nc";
    String cf_role "timeseries_id";
    String ioos_category "Identifier";
    String long_name "Station ID";
  }
  feature_type_instance {
    String ioos_category "Identifier";
    String long_name "Identifier for each feature type instance";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 30.25232, 30.25232;
    String axis "Y";
    String ioos_category "Location";
    String long_name "sensor latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 30.25232;
    Float64 valid_min 30.25232;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -88.17518, -88.17518;
    String axis "X";
    String ioos_category "Location";
    String long_name "sensor longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max -88.17518;
    Float64 valid_min -88.17518;
  }
  crs {
    Int32 actual_range -2147483647, -2147483647;
    String epsg_code "EPSG:4326";
    String geoid_name "NAVD88";
    String grid_mapping_name "latitude_longitude";
    Float64 inverse_flattening 298.257223563;
    String ioos_category "Identifier";
    String long_name "http://www.opengis.net/def/crs/EPSG/0/4326";
    Float64 semi_major_axis 6378137.0;
    String vertical_datum "NAVD88";
    String water_surface_reference_datum "NAVD88";
  }
  platform {
    Int32 actual_range -2147483647, -2147483647;
    String definition "http://mmisw.org/ont/ioos/definition/stationID";
    String ioos_category "Identifier";
    String ioos_code "9721rb-a";
    String long_name "USGS-CMG time-series data from the BIER Water-Level Measurements - Dauphin Island, Alabama project, mooring 972 and package 9721rb-a. Relatively inexpensive pressure sensors were deployed in a rapidly evolving barrier island system to directly measure inundation levels during seasonal and storm events.";
    String nodc_name "FIXED PLATFORM, MOORINGS";
    String short_name "USGS-CMG time-series data: DAUPHIN - 972 - 9721rb-a";
    String type "buried well";
  }
  time {
    UInt32 _ChunkSizes 1000;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.374614704e+9, 1.380773412e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "time of measurement";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  z {
    Float64 actual_range -0.496, -0.496;
    String axis "Z";
    String FillValue "-9999.9";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "z of the sensor relative to the water surface";
    String positive "up";
    String standard_name "height";
    String units "m";
    Float64 valid_max -0.496;
    Float64 valid_min -0.496;
  }
  D_3 {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range 0.39100485858756334, 1.1340931263786151;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 3;
    String FillValue "1e+35";
    String grid_mapping "crs";
    String height_depth_units "m";
    Float64 initial_instrument_height -0.496;
    String ioos_category "Other";
    String long_name "Depth";
    Float64 missing_value 1.0e+35;
    String note "Depth calculated using seawater density of 1022.3. Density calculated using estimated salinity of 34 and temperature of 26";
    String platform "platform";
    String serial_number "024100";
    String standard_name "depth";
    String units "m";
  }
  P_1 {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range 10.5461437, 11.3041985;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1;
    String FillValue "1e+35";
    String grid_mapping "crs";
    String height_depth_units "m";
    Float64 initial_instrument_height -0.496;
    String ioos_category "Other";
    String long_name "Sea Water Pressure";
    Float64 missing_value 1.0e+35;
    String platform "platform";
    String serial_number "024100";
    String standard_name "sea_water_pressure";
    String units "dbar";
  }
  P_1ac {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range 0.3921214777865316, 1.1373318333422748;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1;
    String FillValue "1e+35";
    String grid_mapping "crs";
    String height_depth_units "m";
    Float64 initial_instrument_height -0.496;
    String ioos_category "Other";
    String long_name "Sea Water Pressure";
    Float64 missing_value 1.0e+35;
    String note "Corrected with barometric pressure from  NDBC DPIA1";
    String platform "platform";
    String serial_number "024100";
    String standard_name "sea_water_pressure";
    String units "dbar";
  }
  WL_NAVD88 {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range -0.1044951414124366, 0.6385931263786152;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 18;
    String FillValue "-9999.9";
    String grid_mapping "crs";
    Float64 initial_instrument_height -0.496;
    String ioos_category "Other";
    String long_name "Sea Surface Height";
    Float64 missing_value -9999.9;
    String note "WL_NAVD88 = Depth + -0.4955(sensor elevation, NAVD88).  Referenced to NGS GEOID96.";
    String platform "platform";
    String serial_number "024100";
    String standard_name "sea_surface_height";
    String type "EVEN";
    String units "m";
    String vertical_datum "NAVD88";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_id";
    String Channel_1_calibration "-0.00942366969 57.727178712143 -7.124114089645 18.63177543832";
    String Channel_1_name "Pressure";
    String Channel_1_units "dBar (deciBars)";
    String contributor_name "C. Sherwood";
    String contributor_role "principalInvestigator";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String COORD_SYSTEM "GEOGRAPHIC";
    String CREATION_DATE "02-Oct-2014 17:53:46";
    String creator_email "rsignell@usgs.gov";
    String creator_name "Rich Signell";
    String creator_phone "+1 (508) 548-8700";
    String creator_url "https://www.usgs.gov";
    String DATA_CMNT "P_1ac and D_3 corrected with barometric pressure from NDBC DPIA1";
    String DATA_ORIGIN "USGS WHSC Sed Trans Group";
    String DATA_SUBTYPE "MOORED";
    String date_created "2018-03-26T15:53:00Z";
    String date_issued "2018-03-26T15:53:00Z";
    String date_metadata_modified "2018-03-26T15:53:00Z";
    String date_modified "2018-03-26T15:53:00Z";
    Float64 DELTA_T 5.0;
    String Deployment_date "23-Jul-2013";
    Float64 DEPTH_CONST 0.0;
    String DESCRIPTION "Bay side of 101 Seneca St.      \t    ";
    Float64 DRIFTER 0.0;
    Float64 Easternmost_Easting -88.17518;
    String EXPERIMENT "BIER (Barrier Island Evolution Research)";
    String experiment_name "DAUPHIN";
    String featureType "TimeSeries";
    Float64 FILL_FLAG 0.0;
    String Firmware "6.81";
    String geospatial_bounds "POINT(-88.17518 30.25232)";
    String geospatial_bounds_crs "EPSG:4326";
    String geospatial_bounds_vertical_crs "NAVD88";
    Float64 geospatial_lat_max 30.25232;
    Float64 geospatial_lat_min 30.25232;
    Float64 geospatial_lat_resolution 0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -88.17518;
    Float64 geospatial_lon_min -88.17518;
    Float64 geospatial_lon_resolution 0;
    String geospatial_lon_units "degrees_east";
    String geospatial_vertical_positive "up";
    String geospatial_vertical_resolution "0";
    String geospatial_vertical_units "meters";
    String grid_mapping_epsg_code "EPSG:4326";
    String grid_mapping_geoid_name "NAVD88";
    Float64 grid_mapping_inverse_flattening 298.257223563;
    String grid_mapping_long_name "http://www.opengis.net/def/crs/EPSG/0/4326";
    String grid_mapping_name "latitude_longitude";
    Float64 grid_mapping_semi_major_axis 6378137.0;
    String grid_mapping_vertical_datum "NAVD88";
    String grid_mapping_water_surface_reference_datum "NAVD88";
    String history 
"Mon Nov  4 13:58:54 2019: ncatted -a project,global,a,c,, CMG_Portal DAUPHIN/9721rb-a.nc
Trimmed using trunc_cdfNative,  SVN $Revision: 3342 $ to select records in the range 43427 to 1583104.P_1ac and D_3 corrected with barometric pressure from NDBC DPIA1
2018-03-26T15:53:00Z - pyaxiom - File created using pyaxiom
2024-12-12T06:36:18Z (local files)
2024-12-12T06:36:18Z https://cmgds.marine.usgs.gov/tabledap/DAUPHIN_9721rb_a_nc.das";
    String HostTime "20-Nov-2013 01:45:19.000";
    String HostVersion "(Ruskin version number - 1.8.6.201310311131)";
    String id "9721rb-a";
    String infoUrl "https://cmgds.marine.usgs.gov/ocean-time-series/";
    Float64 initial_instrument_height -0.496;
    String INST_TYPE "RBR DR-1060";
    String institution "Coastal and Marine Hazards and Resources Program, U.S. Geological Survey";
    String institution_url "https://woodshole.er.usgs.gov";
    String keywords "Earth Science > Oceans > Ocean Pressure > Water Pressure, Earth Science > Oceans > Ocean Temperature > Water Temperature, Earth Science > Oceans > Salinity/Density > Conductivity, Earth Science > Oceans > Salinity/Density > Salinity";
    String keywords_vocabulary "GCMD Science Keywords";
    Float64 latitude 30.25232;
    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 LoggerTime "01-Jan-2000 01:11:18.000";
    String LoggingEndTime "28-Nov-2013 06:00:24.000";
    String LoggingSamplingPeriod "00:00:04";
    String LoggingStartTime "21-Jul-2013 21:10:00.000";
    Float64 longitude -88.17518;
    Float64 magnetic_variation -1.74;
    String Model "DR-1060";
    Float64 MOORING 972;
    String naming_authority "gov.usgs.cmgp";
    String ncei_template_version "NCEI_NetCDF_TimeSeries_Orthogonal_Template_v2.0";
    String NCO "netCDF Operators version 4.8.1 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    String NCProperties "version=1|netcdflibversion=4.5.0|hdf5libversion=1.10.1";
    Float64 Northernmost_Northing 30.25232;
    String NumberOfChannels "1";
    String NumberOfSamples "1583106";
    String original_filename "9721rb-a.nc";
    String original_folder "DAUPHIN";
    String platform_type "Buried well";
    Float64 POS_CONST 0.0;
    String PROJECT "USGS Coastal Marine Geology Program";
    String project "U.S. Geological Survey Oceanographic Time-Series Data, CMG_Portal";
    String project_summary "Relatively inexpensive pressure sensors were deployed in a rapidly evolving barrier island system to directly measure inundation levels during seasonal and storm events.";
    String project_title "BIER Water-Level Measurements - Dauphin Island, Alabama";
    String publisher_email "emontgomery@usgs.gov";
    String publisher_name "Ellyn Montgomery";
    String publisher_phone "+1 (508) 548-8700";
    String publisher_url "https://www.usgs.gov";
    String Recovery_date "19-Nov-2013";
    String ResetStamp_1_sample "1583105";
    String ResetStamp_1_time "01-Jan-2000 01:00:00.000";
    String ResetStamp_1_type "RECOVERY STAMP";
    String ResetStamp_2_sample "1583106";
    String ResetStamp_2_time "03-Oct-2013 04:10:18.000";
    String ResetStamp_2_type "WARM STARTUP";
    String ResetStamp_3_sample "1583107";
    String ResetStamp_3_time "01-Jan-2000 01:00:00.000";
    String ResetStamp_3_type "WARM STARTUP";
    String ResetStamp_4_sample "1583107";
    String ResetStamp_4_time "01-Jan-2000 01:01:37.000";
    String ResetStamp_4_type "STOP STAMP";
    String SciPi "C. R. Sherwood";
    String Serial "024100";
    String SN "024100";
    String source "USGS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 30.25232;
    String standard_name_vocabulary "CF-1.6";
    String start_time "23-Jul-2013 21:25:04";
    String stop_time "03-Oct-2013 04:10:12";
    String subsetVariables "station_id";
    String summary "DAUPHIN - 9721rb-a";
    String time_coverage_duration "PT6158708S";
    String time_coverage_end "2013-10-03T04:10:12Z";
    String time_coverage_start "2013-07-23T21:25:04Z";
    String TimeStamp_1_sample "1583105";
    String TimeStamp_1_time "03-Oct-2013 04:10:16.000";
    String TimeStamp_1_type "TIME STAMP";
    String TimeStamp_2_sample "1583106";
    String TimeStamp_2_time "03-Oct-2013 04:10:18.000";
    String TimeStamp_2_type "TIME STAMP";
    String title "DAUPHIN - 9721rb-a";
    Float64 VAR_FILL 1.0e+35;
    Float64 WATER_DEPTH 0.0;
    String WATER_DEPTH_NOTE "Sensor buried in beach";
    String WATER_MASS "Gulf of Mexico";
    Float64 Westernmost_Easting -88.17518;
  }
}

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.