Data Access Form

Dataset Title:	eMOLT Data
Institution:	Environmental Monitors on Lobster Traps and Large Trawlers (Dataset ID: emolt_data)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Subset \| Files \| Make a graph

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Variable

Optional
Constraint #1

Optional
Constraint #2

Minimum

or a List of Values

Maximum

tow_id

30466

segment_type

time (Datetime, UTC)

2018-03-23T09:58:51Z

2025-02-16T02:14:01Z

latitude (degrees_north)

34.6238

44.6548

longitude (degrees_east)

-76.224

-66.3806

depth (m)

1.0015

361.0

temperature (degree_C)

-4.99

47.42

sensor_type

Server-side Functions

distinct()

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File type: (more information)

(Documentation / Bypass this form )

(Please be patient. It may take a while to get the data.)

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  tow_id {
    Int32 _FillValue 2147483647;
    Int32 actual_range 5, 30466;
    String ioos_category "Identifier";
    String long_name "Unique Fishing Operation Identifier";
  }
  segment_type {
    String conventions "Fishing: bottom data; Profiling Down: gear being set; Profiling Up; gear being hauled";
    String ioos_category "Identifier";
    String long_name "Fishing Stage When Data is Collected";
  }
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.521799131e+9, 1.739672041e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Datetime";
    String source_name "datetime";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String time_precision "1970-01-01T00:00:00Z";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 _FillValue NaN;
    Float32 actual_range 34.6238, 44.6548;
    String axis "Y";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 _FillValue NaN;
    Float32 actual_range -76.224, -66.3806;
    String axis "X";
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float32 _FillValue NaN;
    Float32 actual_range 1.0015, 361.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  temperature {
    Float32 _FillValue NaN;
    Float32 actual_range -4.99, 47.42;
    Float64 colorBarMaximum 25.0;
    Float64 colorBarMinimum -4.0;
    String ioos_category "Temperature";
    String long_name "Temperature";
    String standard_name "sea_water_temperature";
    String units "degree_C";
  }
  sensor_type {
    String conventions "SensorML";
    String ioos_category "Identifier";
    String long_name "Sensor Type";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Point";
    String Conventions "COARDS, CF-1.6, ACDD-1.3, ISSCFG, NCCSV-1.2";
    Float64 Easternmost_Easting -66.3806;
    String featureType "Point";
    Float64 geospatial_lat_max 44.6548;
    Float64 geospatial_lat_min 34.6238;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -66.3806;
    Float64 geospatial_lon_min -76.224;
    String geospatial_lon_units "degrees_east";
    Float64 geospatial_vertical_max 361.0;
    Float64 geospatial_vertical_min 1.0015;
    String geospatial_vertical_positive "down";
    String geospatial_vertical_units "m";
    String history 
"2025-02-21T18:22:26Z (local files)
2025-02-21T18:22:26Z https://erddap.ondeckdata.com/erddap/tabledap/emolt_data.html";
    String infoUrl "https://emolt.org/";
    String institution "Environmental Monitors on Lobster Traps and Large Trawlers";
    String keywords "arctic, citizen science, citizen_science, data, Earth Science > Oceans > Salinity/Density > Salinity, fish, fishing, gear, in-situ, industry, latitude, longitude, ocean, pressure, profile, program, salinity, science, sea, sea_water_practical_salinity, seawater, segment, sensor, situ, temperature, time, type, vessel, vessel_gear_type, water";
    String keywords_vocabulary "GCMD Science Keywords";
    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 Northernmost_Northing 44.6548;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 34.6238;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String subsetVariables "segment_type, sensor_type";
    String summary "QC/QA APPLIED. ONLY FLAGGED DATA AS 1";
    String time_coverage_end "2025-02-16T02:14:01Z";
    String time_coverage_start "2018-03-23T09:58:51Z";
    String title "eMOLT Data";
    Float64 Westernmost_Easting -76.224;
  }
}

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.