Make A Graph

Dataset Title:	MBAY_LT - 7771adc-a
Institution:	Coastal and Marine Hazards and Resources Program, U.S. Geological Survey (Dataset ID: MBAY_LT_7771adc_a_nc)
Range:	longitude = -70.7825 to -70.7825°E, latitude = 42.3786 to 42.3786°N, time = 2005-02-09T17:15:00Z to 2005-05-18T12:15:00Z
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 
"MBAY_LT_7771adc_a_nc
MBAY_LT_7771adc_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";
    Float32 actual_range 42.3786, 42.3786;
    String axis "Y";
    String ioos_category "Location";
    String long_name "sensor latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 42.3786;
    Float32 valid_min 42.3786;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -70.7825, -70.7825;
    String axis "X";
    String ioos_category "Location";
    String long_name "sensor longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max -70.7825;
    Float32 valid_min -70.7825;
  }
  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 "7771adc-a";
    String long_name "USGS-CMG time-series data from the Long-term observations in Massachusetts Bay; Site A-Boston Harbor project, mooring 777 and package 7771adc-a. Measurements of currents and other oceanographic properties were made to assess the impact of sewage discharge from the proposed outfall site.";
    String nodc_name "FIXED PLATFORM, MOORINGS";
    String short_name "USGS-CMG time-series data: MBAY_LT - 777 - 7771adc-a";
    String type "fixed";
  }
  time {
    UInt32 _ChunkSizes 1000;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.1079693e+9, 1.1164185e+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 {
    Float32 actual_range -24.83706, -2.837055;
    String axis "Z";
    String FillValue "-9999.900390625";
    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";
    Float32 valid_max -2.8370552;
    Float32 valid_min -24.837055;
  }
  AGC_1202 {
    UInt32 _ChunkSizes 1000, 12;
    Float32 actual_range 76.5, 217.75;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1202;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "F5.1";
    String generic_name "AGC";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Average Echo Intensity (AGC)";
    Float32 missing_value 1.0e+35;
    Float64 norm_factor 0.44999998807907104;
    String NOTE "normalization to db";
    String platform "platform";
    Float64 sensor_depth 29.0571;
    String sensor_type "RD Instruments ADCP";
    Float64 serial_number 473.0;
    String units "counts";
  }
  CD_310 {
    UInt32 _ChunkSizes 1000, 12;
    Float32 actual_range -179.9985, 179.9955;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 310;
    String FillValue "1.0000000409184788e+35";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Current direction";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    String standard_name "direction_of_sea_water_velocity";
    String units "degree";
  }
  CS_300 {
    UInt32 _ChunkSizes 1000, 12;
    Float32 actual_range 3.289655e-5, 0.8885615;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 300;
    String FillValue "1.0000000409184788e+35";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Current speed";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    String standard_name "sea_water_speed";
    String units "m/s";
  }
  PGd_1203 {
    UInt32 _ChunkSizes 1000, 12;
    Float32 actual_range 6.0, 100.0;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1203;
    String FillValue "1.0000000409184788e+35";
    String generic_name "PGd";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Percent Good Pings";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 29.0571;
    String sensor_type "RD Instruments ADCP";
    Float64 serial_number 473.0;
    String units "counts";
  }
  Tx_1211 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 1.670013, 8.640015;
    String ancillary_variables "platform";
    String coordinates "time latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1211;
    String FillValue "1.0000000409184788e+35";
    String generic_name "temp";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Water Temperature (at ADCP Transducer)";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 29.0571;
    String sensor_type "RD Instruments ADCP";
    Float64 serial_number 473.0;
    String standard_name "sea_water_temperature";
    String units "degree_Celsius";
  }
  sensor_depth {
    Float64 actual_range -29.0571, -29.0571;
    String datum "Unknown";
    String ioos_category "Other";
    String long_name "sensor height above datum";
    String positive "up";
    String standard_name "surface_altitude";
    String units "m";
  }
  Werr_1201 {
    UInt32 _ChunkSizes 1000, 12;
    Float32 actual_range -5.686518, 11.89403;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1201;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "F8.1";
    String generic_name "w";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Error Velocity";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 29.0571;
    String sensor_type "RD Instruments ADCP";
    Float64 serial_number 473.0;
    String units "cm/s";
  }
  hght_18 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 0.0, 31.0;
    String ancillary_variables "platform";
    String coordinates "time latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 18;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "f10.2";
    String generic_name "height";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Sea Surface Height";
    Float32 missing_value 1.0e+35;
    String NOTE "height of sea surface relative to transducer head from surface.exe";
    String platform "platform";
    Float64 sensor_depth 29.0571;
    Float64 serial_number 473.0;
    String standard_name "sea_surface_height";
    String units "m";
  }
  u_1205 {
    UInt32 _ChunkSizes 1000, 12;
    Float32 actual_range -0.8168585, 0.7347572;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1205;
    String FillValue "1.0000000409184788e+35";
    String generic_name "u";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Eastward (u) velocity";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 29.0571;
    String sensor_type "RD Instruments ADCP";
    Float64 serial_number 473.0;
    String standard_name "eastward_sea_water_velocity";
    String units "m/s";
  }
  v_1206 {
    UInt32 _ChunkSizes 1000, 12;
    Float32 actual_range -0.8070059, 0.874135;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1206;
    String FillValue "1.0000000409184788e+35";
    String generic_name "v";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Northward (v) velocity";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 29.0571;
    String sensor_type "RD Instruments ADCP";
    Float64 serial_number 473.0;
    String standard_name "northward_sea_water_velocity";
    String units "m/s";
  }
  w_1204 {
    UInt32 _ChunkSizes 1000, 12;
    Float32 actual_range -0.05290904, 0.06762179;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1204;
    String FillValue "1.0000000409184788e+35";
    String generic_name "w";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Upward (w) velocity";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 29.0571;
    String sensor_type "RD Instruments ADCP";
    Float64 serial_number 473.0;
    String standard_name "upward_sea_water_velocity";
    String units "m/s";
  }
 }
  NC_GLOBAL {
    Int32 ADCP_serial_number 473;
    Int32 beam_angle 20;
    String beam_pattern "convex";
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_id";
    Int32 COMPOSITE 0;
    String contributor_name "B. Butman";
    String contributor_role "principalInvestigator";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String COORD_SYSTEM "GEOGRAPHIC";
    String CREATION_DATE "23-May-2005 10:42:57";
    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_ORIGIN "USGS WHFS Sed Trans Group";
    String DATA_SUBTYPE "MOORED";
    String DATA_TYPE "ADCP";
    String date_created "2017-04-11T22:19:00Z";
    String date_issued "2017-04-11T22:19:00Z";
    String date_metadata_modified "2017-04-11T22:19:00Z";
    String date_modified "2017-04-11T22:19:00Z";
    String DELTA_T "900.3195";
    String Deployment_date "09-feb-2005";
    Int32 DEPTH_CONST 0;
    String DESCRIPT "Boston Buoy B ADCP";
    Int32 DRIFTER 0;
    Float64 Easternmost_Easting -70.7825;
    Int32 ending_water_layer 5;
    Int32 error_velocity_threshold 2000;
    String EXPERIMENT "Mass Bay Longterm";
    String experiment_name "MBAY_LT";
    Int32 false_target_reject_values 50, 255;
    String featureType "TimeSeries";
    Int32 FILL_FLAG 0;
    Float32 firmware_version 16.21;
    Int32 frequency 300;
    String geospatial_bounds "POINT(-70.78250122070312 42.37860107421875)";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 42.3786;
    Float64 geospatial_lat_min 42.3786;
    Float64 geospatial_lat_resolution 0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -70.7825;
    Float64 geospatial_lon_min -70.7825;
    Float64 geospatial_lon_resolution 0;
    String geospatial_lon_units "degrees_east";
    String geospatial_vertical_positive "up";
    String geospatial_vertical_resolution "2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0";
    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 20:20:35 2019: ncatted -a project,global,a,c,, CMG_Portal MBAY_LT/7771adc-a.nc
Time fixed in dolly.m by increasing time -0.83333 hours from record 3491 thru 9389.:Trimmed using truncate.m to select records in the range 1 to 9389.  :Written to an EPIC standard data file by adcp2ep.m (version 1.1)
Transformed to earth coordinates by runbm2g.m
Bins were trimmed by trimBins.m using 94% of the RDI surface output.
Ensembles recorded pre and post deployment were trimmed by goodends.m.
The data were filtered using rdi quality control factors in runmask.m.
Converted to netCDF via MATLAB by rdi2cdf.m 3.0 10-Jan-2003
2017-04-11T22:19:00Z - pyaxiom - File created using pyaxiom
2024-12-12T10:29:58Z (local files)
2024-12-12T10:29:58Z https://cmgds.marine.usgs.gov/tabledap/MBAY_LT_7771adc_a_nc.das";
    String id "7771adc-a";
    String infoUrl "https://cmgds.marine.usgs.gov/ocean-time-series/";
    String INST_TYPE "RD Instruments ADCP";
    String institution "Coastal and Marine Hazards and Resources Program, U.S. Geological Survey";
    String janus "4 Beam";
    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 42.3786;
    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 -70.78250122070312;
    Float64 magnetic_variation -15.5;
    Int32 minmax_percent_good 0, 100;
    Float64 MOORING 777;
    String naming_authority "gov.usgs.cmgp";
    String ncei_template_version "NCEI_NetCDF_TimeSeriesProfile_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 42.3786;
    String orientation "UP";
    String original_filename "7771adc-a.nc";
    String original_folder "MBAY_LT";
    Int32 pings_per_ensemble 300;
    Int32 POS_CONST 0;
    Float32 pred_accuracy 0.35;
    String PROJECT "MWRA";
    String project "U.S. Geological Survey Oceanographic Time-Series Data, CMG_Portal";
    String project_summary "Measurements of currents and other oceanographic properties were made to assess the impact of sewage discharge from the proposed outfall site.";
    String project_title "Long-term observations in Massachusetts Bay; Site A-Boston Harbor";
    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 "18-may-2005";
    String source "USGS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 42.3786;
    String standard_name_vocabulary "CF-1.6";
    String start_time "09-Feb-2005 17:15:00";
    Int32 starting_water_layer 1;
    String stop_time "18-May-2005 12:15:00";
    String subsetVariables "station_id";
    String summary "MBAY_LT - 7771adc-a";
    Float32 time_between_ping_groups 1.0;
    String time_coverage_duration "PT8449200S";
    String time_coverage_end "2005-05-18T12:15:00Z";
    String time_coverage_start "2005-02-09T17:15:00Z";
    String title "MBAY_LT - 7771adc-a";
    String transform "EARTH";
    Int32 transmit_pulse_length_cm 242;
    Int32 valid_correlation_range 64, 255;
    String VAR_DESC "u:v:w:Werr:AGC:PGd:hght:Tx";
    Float64 VAR_FILL 1.0000000409184788e+35;
    Float64 WATER_DEPTH 32.40705490112305;
    String WATER_MASS "?";
    Float64 Westernmost_Easting -70.7825;
  }
}

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.