ERDDAP > tabledap > Data Access Form

Dataset Title:	MBAY_LT - 6891mc-a
Institution:	Coastal and Marine Hazards and Resources Program, U.S. Geological Survey   (Dataset ID: MBAY_LT_6891mc_a_nc)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Subset | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum    or a List of Values	Maximum
station_id	!= =~ <= >= = < >		!= =~ <= >= = < >		"\"MBAY_LT_6891mc_a_nc\""
feature_type_instance	!= =~ <= >= = < >		!= =~ <= >= = < >		"6891mc-a"	"6891mc-a"
latitude (sensor latitude, degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		42.3774	42.3774
longitude (sensor longitude, degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-70.7819	-70.7819
crs	!= =~ <= >= = < >		!= =~ <= >= = < >		-2147483647	-2147483647
platform	!= =~ <= >= = < >		!= =~ <= >= = < >		-2147483647	-2147483647
time (time of measurement, UTC)	!= =~ <= >= = < >		!= =~ <= >= = < >		2002-05-21T16:50:00Z	2002-10-24T13:20:00Z
z (m)	!= =~ <= >= = < >		!= =~ <= >= = < >		-4.0	-4.0
C_51 (Conductivity, S/m)	!= =~ <= >= = < >		!= =~ <= >= = < >		3.23495	4.35123
STH_71 (kg/m^3)	!= =~ <= >= = < >		!= =~ <= >= = < >		19.8905	27.2409
S_40 (Salinity, 1e-3)	!= =~ <= >= = < >		!= =~ <= >= = < >		27.6504	35.7164
T_20 (degree_Celsius)	!= =~ <= >= = < >		!= =~ <= >= = < >		7.043915	20.54901

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" station_id feature_type_instance latitude longitude crs platform time z C_51 STH_71 S_40 T_20 station_id feature_type_instance latitude longitude crs platform time z C_51 STH_71 S_40 T_20 station_id feature_type_instance latitude longitude crs platform time z C_51 STH_71 S_40 T_20 station_id feature_type_instance latitude longitude crs platform time z C_51 STH_71 S_40 T_20 station_id feature_type_instance latitude longitude crs platform time z C_51 STH_71 S_40 T_20 ")

File type: (more information) .asc - View OPeNDAP-style ISO-8859-1 comma-separated text. .csv - Download a ISO-8859-1 comma-separated text table (line 1: names; line 2: units; ISO 8601 times). .csvp - Download a ISO-8859-1 .csv file with line 1: name (units). Times are ISO 8601 strings. .csv0 - Download a ISO-8859-1 .csv file without column names or units. Times are ISO 8601 strings. .dataTable - A JSON file formatted for use with the Google Visualization client library (Google Charts). .das - View the dataset's metadata via an ISO-8859-1 OPeNDAP Dataset Attribute Structure (DAS). .dds - View the dataset's structure via an ISO-8859-1 OPeNDAP Dataset Descriptor Structure (DDS). .dods - OPeNDAP clients use this to download the data in the DODS binary format. .esriCsv - Download a ISO_8859_1 .csv file for ESRI's ArcGIS 9.x and below (separate date and time columns). .fgdc - View the dataset's UTF-8 FGDC .xml metadata. .geoJson - Download longitude,latitude,otherColumns data as a UTF-8 GeoJSON .json file. .graph - View a Make A Graph web page. .help - View a web page with a description of tabledap. .html - View an OPeNDAP-style HTML Data Access Form. .htmlTable - View a UTF-8 .html web page with the data in a table. Times are ISO 8601 strings. .iso19115 - View the dataset's ISO 19115-2/19139 UTF-8 .xml metadata. .itx - Download an ISO-8859-1 Igor Text File. Each response column becomes a wave. .json - View a table-like UTF-8 JSON file (missing value = 'null'; times are ISO 8601 strings). .jsonlCSV1 - View a UTF-8 JSON Lines CSV file with column names on line 1 (mv = 'null'; times are ISO 8601 strings). .jsonlCSV - View a UTF-8 JSON Lines CSV file without column names (mv = 'null'; times are ISO 8601 strings). .jsonlKVP - View a UTF-8 JSON Lines file with Key:Value pairs (missing value = 'null'; times are ISO 8601 strings). .mat - Download a MATLAB binary file. .nc - Download a flat, table-like, NetCDF-3 binary file with COARDS/CF/ACDD metadata. .ncHeader - View the UTF-8 header (the metadata) for the NetCDF-3 .nc file. .ncCF - Download a NetCDF-3 CF Discrete Sampling Geometries file (Contiguous Ragged Array). .ncCFHeader - View the UTF-8 header (the metadata) for the .ncCF file. .ncCFMA - Download a NetCDF-3 CF Discrete Sampling Geometries file (Multidimensional Array). .ncCFMAHeader - View the UTF-8 header (the metadata) for the .ncCFMA file. .nccsv - Download a NetCDF-3-like 7-bit ASCII NCCSV .csv file with COARDS/CF/ACDD metadata. .nccsvMetadata - View the dataset's metadata as the top half of a 7-bit ASCII NCCSV .csv file. .ncoJson - Download a UTF-8 NCO lvl=2 JSON file with COARDS/CF/ACDD metadata. .odvTxt - Download longitude,latitude,time,otherColumns as an ISO-8859-1 ODV Generic Spreadsheet File (.txt). .subset - View an HTML form which uses faceted search to simplify picking subsets of the data. .tsv - Download a ISO-8859-1 tab-separated text table (line 1: names; line 2: units; ISO 8601 times). .tsvp - Download a ISO-8859-1 .tsv file with line 1: name (units). Times are ISO 8601 strings. .tsv0 - Download a ISO-8859-1 .tsv file without column names or units. Times are ISO 8601 strings. .wav - Download a .wav audio file. All columns must be numeric and of the same type. .xhtml - View a UTF-8 XHTML (XML) file with the data in a table. Times are ISO 8601 strings. .kml - View a .kml file, suitable for Google Earth. .smallPdf - View a small .pdf image file with a graph or map. .pdf - View a standard, medium-sized .pdf image file with a graph or map. .largePdf - View a large .pdf image file with a graph or map. .smallPng - View a small .png image file with a graph or map. .png - View a standard, medium-sized .png image file with a graph or map. .largePng - View a large .png image file with a graph or map. .transparentPng - View a .png image file (just the data, without axes, landmask, or legend).

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  station_id {
    String actual_range 
"MBAY_LT_6891mc_a_nc
MBAY_LT_6891mc_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 -70.7819, -70.7819;
    String axis "X";
    String ioos_category "Location";
    String long_name "sensor longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max -70.7819;
    Float32 valid_min -70.7819;
  }
  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 "6891mc-a";
    String long_name "USGS-CMG time-series data from the Long-term observations in Massachusetts Bay; Site A-Boston Harbor project, mooring 689 and package 6891mc-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 - 689 - 6891mc-a";
    String type "fixed";
  }
  time {
    UInt32 _ChunkSizes 1000;
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.0219998e+9, 1.0354656e+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 -4.0, -4.0;
    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 -4.0;
    Float32 valid_min -4.0;
  }
  C_51 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 3.23495, 4.35123;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 51;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "f10.3";
    String generic_name "con";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Conductivity";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 4.0;
    String serial_number "MC-728";
    String standard_name "sea_water_electrical_conductivity";
    String units "S/m";
  }
  STH_71 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 19.8905, 27.2409;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 71;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "f10.2";
    String generic_name "potden";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Sigma-theta of sea water";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 4.0;
    String serial_number "MC-728";
    String standard_name "sea_water_sigma_theta";
    String units "kg/m^3";
  }
  S_40 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 27.6504, 35.7164;
    String ancillary_variables "platform";
    String coordinates "time z latitude longitude";
    String coverage_content_type "physicalMeasurement";
    Int32 epic_code 40;
    String FillValue "1.0000000409184788e+35";
    String FORTRAN_format "f10.2";
    String generic_name "sal";
    String grid_mapping "crs";
    String ioos_category "Other";
    String long_name "Salinity";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 4.0;
    String serial_number "MC-728";
    String standard_name "sea_water_practical_salinity";
    String units "1e-3";
  }
  T_20 {
    UInt32 _ChunkSizes 1000;
    Float32 actual_range 7.043915, 20.54901;
    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 ioos_category "Other";
    String long_name "Water Temperature";
    Float32 missing_value 1.0e+35;
    String platform "platform";
    Float64 sensor_depth 4.0;
    String serial_number "MC-728";
    String standard_name "sea_water_temperature";
    String units "degree_Celsius";
  }
 }
  NC_GLOBAL {
    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 "GEOGRAPHICAL";
    String CREATION_DATE "25-Feb-2003 09:12:14";
    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 "Microcat Boston Longterm";
    String DATA_ORIGIN "USGS/WHFC";
    String DATA_TYPE "TIME";
    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 "300";
    Int32 DEPTH_CONST 0;
    Int32 DRIFTER 0;
    Float64 Easternmost_Easting -70.7819;
    String EXPERIMENT "MWRA";
    String experiment_name "MBAY_LT";
    String featureType "TimeSeries";
    Int32 FILL_FLAG 0;
    String geospatial_bounds "POINT(-70.78189849853516 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 -70.7819;
    Float64 geospatial_lon_min -70.7819;
    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 20:20:07 2019: ncatted -a project,global,a,c,, CMG_Portal MBAY_LT/6891mc-a.nc
Extra variables deleted by dolly.m.:Trimmed using truncate.m to select records in the range 203 to 45089.  :Converted from ascii to EPIC by asc2epic.m
2017-04-11T22:16:00Z - pyaxiom - File created using pyaxiom
2024-12-12T10:39:29Z (local files)
2024-12-12T10:39:29Z https://cmgds.marine.usgs.gov/erddap/tabledap/MBAY_LT_6891mc_a_nc.html";
    String id "6891mc-a";
    String infoUrl "https://cmgds.marine.usgs.gov/ocean-time-series/";
    Float32 inst_depth 4.0;
    String INST_TYPE "Seabird Microcat";
    String institution "Coastal and Marine Hazards and Resources Program, U.S. Geological Survey";
    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";
    Float32 latitude 42.3774;
    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.";
    Float32 longitude -70.7819;
    Float32 magnetic_variation -16.0;
    Float32 meters_from_bottom 26.9;
    Float64 MOORING 689;
    String moortype "subsurface";
    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 "6891mc-a.nc";
    String original_folder "MBAY_LT";
    Int32 POS_CONST 0;
    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 scipi "Brad Butman";
    String source "USGS";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 42.3774;
    String standard_name_vocabulary "CF-1.6";
    String start_time "21-May-2002 16:50:00";
    String stop_time "24-Oct-2002 13:20:00";
    String subsetVariables "station_id";
    String summary "MBAY_LT - 6891mc-a";
    String time_coverage_duration "PT13465800S";
    String time_coverage_end "2002-10-24T13:20:00Z";
    String time_coverage_start "2002-05-21T16:50:00Z";
    String title "MBAY_LT - 6891mc-a";
    String VAR_DESC "T:C:S:STH";
    Float32 water_depth 30.9;
    String WATER_MASS "?";
    Float64 Westernmost_Easting -70.7819;
  }
}

 

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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 Data Access Protocol (DAP) and its selection constraints.

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.