Make A Graph

Dataset Title:	CHINCOTEAGUE - 10251Calt-a
Institution:	Coastal and Marine Hazards and Resources Program, U.S. Geological Survey (Dataset ID: CHINCOTEAGUE_10251Calt_a_nc)
Range:	longitude = -75.25226 to -75.25226°E, latitude = 38.09011 to 38.09011°N, time = 2015-01-22T20:45:04Z to 2015-04-21T22:00:04Z
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 
"CHINCOTEAGUE_10251Calt_a_nc
CHINCOTEAGUE_10251Calt_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 38.09011, 38.09011;
    String axis "Y";
    String ioos_category "Location";
    String long_name "sensor latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float64 valid_max 38.09011;
    Float64 valid_min 38.09011;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -75.25226, -75.25226;
    String axis "X";
    String ioos_category "Location";
    String long_name "sensor longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float64 valid_max -75.25226;
    Float64 valid_min -75.25226;
  }
  crs {
    Int32 actual_range -2147483647, -2147483647;
    String epsg_code "EPSG:4326";
    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;
  }
  platform {
    Int32 actual_range -2147483647, -2147483647;
    String definition "http://mmisw.org/ont/ioos/definition/stationID";
    String ioos_category "Identifier";
    String ioos_code "10251Calt-a";
    String long_name "USGS-CMG time-series data from the Estuarine Physical Response to Storms (EPR), Chincoteague Bay, Maryland/Virginia, 2014-2015 project, mooring 1025 and package 10251Calt-a. Oceanographic, and water-quality observations made in in Chincoteague Bay, Maryland/Virginia, 2014-2015 to characterize the processes that affect sediment transport to tidal wetlands.";
    String nodc_name "FIXED PLATFORM, MOORINGS";
    String short_name "USGS-CMG time-series data: CHINCOTEAGUE - 1025 - 10251Calt-a";
    String type "aluminum h-frame";
  }
  time {
    UInt32 _ChunkSizes 1000;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.421959504e+9, 1.429653604e+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 -0.32999999999999996, -0.32999999999999996;
    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 -0.32999999999999996;
    Float64 valid_min -0.32999999999999996;
  }
  AMP_723 {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range 0.0, 100.0;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Float64 epoc_code 723.0;
    String FillValue "1e+35";
    String grid_mapping "crs";
    String height_depth_units "m";
    Float64 initial_sensor_height 0.55;
    String ioos_category "Other";
    String long_name "Amplitude of signal";
    Float64 missing_value 1.0e+35;
    String note "burst mean";
    String platform "platform";
    Float64 sensor_depth 0.33;
    String units "percent";
  }
  BAT_106 {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range 4.278, 4.576;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Float64 epic_code 106.0;
    String FillValue "1e+35";
    String grid_mapping "crs";
    String height_depth_units "m";
    Float64 initial_sensor_height 0.55;
    String ioos_category "Other";
    String long_name "Battery voltage";
    Float64 missing_value 1.0e+35;
    String note "burst mean";
    String platform "platform";
    Float64 sensor_depth 0.33;
    String units "volts";
  }
  Png_1208 {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range 1174.5, 86664.5;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Float64 epic_code 1208.0;
    String FillValue "1e+35";
    String grid_mapping "crs";
    String height_depth_units "m";
    Float64 initial_sensor_height 0.55;
    String ioos_category "Other";
    String long_name "Pings";
    Float64 missing_value 1.0e+35;
    String note "burst mean";
    String platform "platform";
    Float64 sensor_depth 0.33;
    String units "number";
  }
  Tx_1211 {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range -2.819999999999993, 17.620000000000005;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1211;
    String FillValue "1e+35";
    String grid_mapping "crs";
    String height_depth_units "m";
    Float64 initial_sensor_height 0.55;
    String ioos_category "Other";
    String long_name "Water Temperature (at ADCP Transducer)";
    Float64 missing_value 1.0e+35;
    String note "burst mean";
    String platform "platform";
    Float64 sensor_depth 0.33;
    String standard_name "sea_water_temperature";
    String units "degree_Celsius";
  }
  brange {
    UInt32 _ChunkSizes 1000;
    Float64 actual_range 0.5307111111111111, 0.5988;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    String FillValue "1e+35";
    String grid_mapping "crs";
    String height_depth_units "m";
    Float64 initial_sensor_height 0.55;
    String ioos_category "Other";
    String long_name "Sensor range to boundary";
    Float64 missing_value 1.0e+35;
    String note "burst mean altitude ignoring fill values,Filtered altitude data to eliminate data where altitude absolute difference was > 0.02 m from 15 point median filtered altitude, Set to fill value after 16-Feb-2015 00:00, due to ice moving frames";
    String platform "platform";
    Float64 sensor_depth 0.33;
    String units "m";
  }
 }
  NC_GLOBAL {
    Float64 ampcutoff 80.0;
    Float64 amplitude 80.0;
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_id";
    Float64 COMPOSITE 0.0;
    String contributor_name "N. Ganju";
    String contributor_role "principalInvestigator";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String COORD_SYSTEM "GEOGRAPHIC";
    String CREATION_DATE "29-Jul-2015 16:31:30";
    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 "Ice distrubed frame on or about 16-Feb-2015, Clock drifted 0min 7sec from 1/21/2015 to 4/22/2015";
    String DATA_ORIGIN "USGS WHCMSC Sed Trans Group";
    String DATA_SUBTYPE "MOORED";
    String date_created "2017-04-11T21:31:00Z";
    String date_issued "2017-04-11T21:31:00Z";
    String date_metadata_modified "2017-04-11T21:31:00Z";
    String date_modified "2017-04-11T21:31:00Z";
    Float64 deadzone 150.0;
    Float64 DELTA_T 900.0;
    String Deployment_date "22-Jan-2015";
    Float64 DEPTH_CONST 0.0;
    String DESCRIPTION "site CB07, Pirate Island Shallow";
    Float64 DRIFTER 0.0;
    Float64 Easternmost_Easting -75.25226;
    String EXPERIMENT "Estuarine physical response";
    String experiment_name "CHINCOTEAGUE";
    String featureType "TimeSeries";
    Float64 FILL_FLAG 1.0;
    String freq "450 KHz";
    String geospatial_bounds "POINT(-75.25226 38.09011)";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 38.09011;
    Float64 geospatial_lat_min 38.09011;
    Float64 geospatial_lat_resolution 0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -75.25226;
    Float64 geospatial_lon_min -75.25226;
    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";
    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 history 
"Fri Nov  1 20:16:53 2019: ncatted -a project,global,a,c,, CMG_Portal CHINCOTEAGUE/10251Calt-a.nc
brange set to fill value after 16-Feb-2015 00:00 due to ice damage to frame, Replace spikes/bad data with fill values using median filtering method, Trimmed using trunc_cdfNative,  SVN $Revision: 3342 $ to select records in the range 112 to 8661.  :created using AA400altcdf2burstncNative in Matlab 8.3.0.532 (R2014a).: Replace Altitude burst value with _FILLValue when Altitude reading = 0 or Amplitude < 80.
2017-04-11T21:31:00Z - pyaxiom - File created using pyaxiom
2024-12-12T06:26:26Z (local files)
2024-12-12T06:26:26Z https://cmgds.marine.usgs.gov/tabledap/CHINCOTEAGUE_10251Calt_a_nc.das";
    String id "10251Calt-a";
    String infoUrl "https://cmgds.marine.usgs.gov/ocean-time-series/";
    Float64 initial_instrument_height 0.55;
    String INST_TYPE "EofE AA400 Altimeter";
    String institution "Coastal and Marine Hazards and Resources Program, U.S. Geological Survey";
    String institution_url "https://woodshole.er.usgs.gov";
    Float64 interval 900.0;
    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 38.09011;
    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 longitude -75.25226;
    Float64 magnetic_variation -11.7;
    Float64 MOORING 1025;
    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=4.4.1.1|hdf5libversion=1.8.17";
    Float64 Northernmost_Northing 38.09011;
    Int32 nrecords 87540;
    Int32 nseries 8754;
    Float64 offset 0.0;
    String orientation "down";
    String original_filename "10251Calt-a.nc";
    String original_folder "CHINCOTEAGUE";
    String platform_type "Aluminum H-frame";
    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 "Oceanographic, and water-quality observations made in in Chincoteague Bay, Maryland/Virginia, 2014-2015 to characterize the processes that affect sediment transport to tidal wetlands.";
    String project_title " Estuarine Physical Response to Storms (EPR), Chincoteague Bay, Maryland/Virginia, 2014-2015";
    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";
    Float64 range 2000.0;
    String Recovery_date "21-Apr-2015";
    Float64 sampling 1.0;
    String SciPi "N. Ganju";
    String serial_number "0084";
    Float64 series 10.0;
    String source "USGS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 38.09011;
    String standard_name_vocabulary "CF-1.6";
    String start_time "22-Jan-2015 20:45:04";
    String stop_time "21-Apr-2015 22:00:04";
    String subsetVariables "station_id";
    String summary "CHINCOTEAGUE - 10251Calt-a";
    Float64 threshold 45.0;
    String time_coverage_duration "PT7694100S";
    String time_coverage_end "2015-04-21T22:00:04Z";
    String time_coverage_start "2015-01-22T20:45:04Z";
    String title "CHINCOTEAGUE - 10251Calt-a";
    Float64 txlength 20.0;
    String VAR_DESC "Altitude";
    Float64 VAR_FILL 1.0e+35;
    Float64 WATER_DEPTH 0.88;
    String WATER_DEPTH_NOTE "(meters), nominal depth";
    String WATER_MASS "Chincoteague Bay, VA/MD";
    Float64 Westernmost_Easting -75.25226;
  }
}

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.