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Dataset Title:	MBAY_LT - 6824Avm-a
Institution:	Coastal and Marine Hazards and Resources Program, U.S. Geological Survey (Dataset ID: MBAY_LT_6824Avm_a_nc)
Range:	longitude = -70.7816 to -70.7816°E, latitude = 42.3774 to 42.3774°N, time = 2002-02-06T17:07:30Z to 2002-04-21T16:41:15Z
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_6824Avm_a_nc
MBAY_LT_6824Avm_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 42.3774, 42.3774;
    String axis "Y";
    String ioos_category "Location";
    String long_name "sensor latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 42.3774;
    Float32 valid_min 42.3774;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -70.7816, -70.7816;
    String axis "X";
    String ioos_category "Location";
    String long_name "sensor longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max -70.7816;
    Float32 valid_min -70.7816;
  }
  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 "6824Avm-a";
    String long_name "USGS-CMG time-series data from the Long-term observations in Massachusetts Bay; Site A-Boston Harbor project, mooring 682 and package 6824Avm-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 - 682 - 6824Avm-a";
    String type "fixed";
  }
  time {
    UInt32 _ChunkSizes 1000;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.01301525e+9, 1.019407275e+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 -23.63, -23.63;
    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 -23.63;
    Float32 valid_min -23.63;
  }
  CD_310 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 0.0, 359.9454;
    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 FORTRAN_format "f8.2";
    String generic_name "vdir";
    String grid_mapping "crs";
    String interp_note "1 pad values interpolated.";
    String ioos_category "Other";
    String long_name "Current direction";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float32 sensor_depth 23.63;
    Float32 sensor_hab 10.23;
    String sensor_type "VMCM ";
    String serial_number "VM306";
    String standard_name "direction_of_sea_water_velocity";
    String units "degree";
  }
  CS_300 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 0.0, 0.2709208;
    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 FORTRAN_format "f8.2";
    String generic_name "vspd";
    String grid_mapping "crs";
    String interp_note "1 pad values interpolated.";
    String ioos_category "Other";
    String long_name "Current speed";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float32 sensor_depth 23.63;
    Float32 sensor_hab 10.23;
    String sensor_type "VMCM ";
    String serial_number "VM306";
    String standard_name "sea_water_speed";
    String units "m/s";
  }
  T_20 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 3.971558, 6.206024;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 20;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "f10.2";
    String generic_name "temp";
    String grid_mapping "crs";
    String interp_note "1 pad values interpolated.";
    String ioos_category "Other";
    String long_name "Water Temperature";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float32 sensor_depth 23.63;
    Float32 sensor_hab 10.23;
    String sensor_type "VMCM ";
    String serial_number "T-0206";
    String standard_name "sea_water_temperature";
    String units "degree_Celsius";
  }
  comp_1404 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 0.0, 358.5938;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 1404;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "f10.1";
    String generic_name "comp";
    String grid_mapping "crs";
    String interp_note "1 pad values interpolated.";
    String ioos_category "Other";
    String long_name "Instrument Heading (magnetic north)";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float32 sensor_depth 23.63;
    Float32 sensor_hab 10.23;
    String sensor_type "VMCM ";
    String serial_number "VM306";
    String standard_name "platform_orientation";
    String units "degree";
  }
  lowr_4002 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range -277.0, 601.0;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 4002;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "f10.1";
    String generic_name "rotor";
    String grid_mapping "crs";
    String interp_note "1 pad values interpolated.";
    String ioos_category "Other";
    String long_name "LOWER ROTOR SPEED  ";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float32 sensor_depth 23.63;
    Float32 sensor_hab 10.23;
    String sensor_type "VMCM ";
    String serial_number "VM306";
    String units "counts";
  }
  u_1205 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range -0.2537575, 0.2524594;
    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 interp_note "1 pad values interpolated.";
    String ioos_category "Other";
    String long_name "Eastward (u) velocity";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float32 sensor_depth 23.63;
    Float32 sensor_hab 10.23;
    String sensor_type "VMCM ";
    String serial_number "VM306";
    String standard_name "eastward_sea_water_velocity";
    String units "m/s";
  }
  upr_4000 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range -646.0, 622.0;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 4000;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "f10.1";
    String generic_name "rotor";
    String grid_mapping "crs";
    String interp_note "1 pad values interpolated.";
    String ioos_category "Other";
    String long_name "UPPER ROTOR SPEED     ";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float32 sensor_depth 23.63;
    Float32 sensor_hab 10.23;
    String sensor_type "VMCM ";
    String serial_number "VM306";
    String units "counts";
  }
  v_1206 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range -0.2168983, 0.1524534;
    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 interp_note "1 pad values interpolated.";
    String ioos_category "Other";
    String long_name "Northward (v) velocity";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float32 sensor_depth 23.63;
    Float32 sensor_hab 10.23;
    String sensor_type "VMCM ";
    String serial_number "VM306";
    String standard_name "northward_sea_water_velocity";
    String units "m/s";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "TimeSeries";
    String cdm_timeseries_variables "station_id";
    String contributor_name "B. Butman";
    String contributor_role "principalInvestigator";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String CREATION_DATE "10-Feb-2009 11:16:34";
    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 "Boston VMCM";
    String DATA_ORIGIN "USGS WHFC Sed Trans Grp";
    String date_created "2017-04-11T22:16:00Z";
    String date_issued "2017-04-11T22:16:00Z";
    String date_metadata_modified "2017-04-11T22:16:00Z";
    String date_modified "2017-04-11T22:16:00Z";
    String DELTA_T "225";
    String DESCRIPT 
" FFA  4A4E   27    403    10   -1   -1   -2   8192\r
Mooring # 682-4                                                       \r
VMCM # 306                                                            \r
Thermistor # 206                                                      \r
Record I = 3.75 min                                                   \r
Sample I = .25 sec                                                    \r
  45050 records processed  --  Wed Apr 08 19:35:32 1981               \r
 Errors:     5 parity,      9 long records,                           \r
             0 short records,      5 tape errors                      \r
";
    Float64 Easternmost_Easting -70.7816;
    String EXPERIMENT "Boston Long Term";
    String experiment_name "MBAY_LT";
    String featureType "TimeSeries";
    Float64 FILL_FLAG 0.0;
    String geospatial_bounds "POINT(-70.78160095214844 42.37739944458008)";
    String geospatial_bounds_crs "EPSG:4326";
    Float64 geospatial_lat_max 42.3774;
    Float64 geospatial_lat_min 42.3774;
    Float64 geospatial_lat_resolution 0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -70.7816;
    Float64 geospatial_lon_min -70.7816;
    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 20:20:03 2019: ncatted -a project,global,a,c,, CMG_Portal MBAY_LT/6824Avm-a.nc
WATER_DEPTH related attributes corrected by fix_mooringdepth: Trimmed using truncate.m to select records in the range 1 to 28408.  :8 pad values replaced by linear interpolations using EPIC_interp.m :Variables comp_1404, upr_4000, lowr_4002, u_1205, v_1206, CD_310, CS_300, T_20,  edited using rangedit.m to select lowr_4002 in the range -1000 to 1000.  :Time fixed in dolly.m by increasing time -1 hours from record 35445 thru 35445.:Trimmed using truncate.m to select records in the range 2000 to 41882.  : Edited using range_delete.m to delete records unless time is in the range 2452300 to 2452440.  :Calibrated using runVMCM.m :Raw file converted to NetCDF by vmcm2cdf 1.0 1/3/03
2017-04-11T22:16:00Z - pyaxiom - File created using pyaxiom
2024-12-12T10:40:29Z (local files)
2024-12-12T10:40:29Z https://cmgds.marine.usgs.gov/tabledap/MBAY_LT_6824Avm_a_nc.das";
    String id "6824Avm-a";
    String infoUrl "https://cmgds.marine.usgs.gov/ocean-time-series/";
    Float32 inst_depth 23.63;
    String inst_depth_note "inst_depth = (water_depth - inst_height); nominal depth below the surface";
    Float32 inst_height 10.23;
    String inst_height_note "height in meters above bottom: nominal for moorings";
    String INST_TYPE "VMCM";
    String institution "Coastal and Marine Hazards and Resources Program, U.S. Geological Survey";
    String instrument_number "VM306";
    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 42.37739999983046;
    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 -70.78159999953375;
    Float64 magnetic_variation -16.0;
    Float64 MOORING 682;
    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 42.3774;
    String original_filename "6824Avm-a.nc";
    String original_folder "MBAY_LT";
    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 source "USGS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 42.3774;
    String standard_name_vocabulary "CF-1.6";
    String start_time "06-Feb-2002 17:07:30";
    String stop_time "21-Apr-2002 16:41:15";
    String subsetVariables "station_id";
    String summary "MBAY_LT - 6824Avm-a";
    String time_coverage_duration "PT6392025S";
    String time_coverage_end "2002-04-21T16:41:15Z";
    String time_coverage_resolution "PT225S";
    String time_coverage_start "2002-02-06T17:07:30Z";
    String title "MBAY_LT - 6824Avm-a";
    String VAR_DESC "comp:upr:upr:u:v:CD:CS:T";
    String VAR_FILL "NaN";
    Float32 WATER_DEPTH 33.83;
    String WATER_DEPTH_NOTE "determined from pressure measured on tripod (6822sc-a.nc); WD = sensor height above bottom + (average pressure/10)-10.13: (m) ";
    Float64 Westernmost_Easting -70.7816;
  }
}

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.