Data Access Form

Dataset Title:	Lake Ontario, Nowcast, 2D, All Years, Lake Ontario, Nowcast, 2D, All Years, Best Time Series [time], 2012-present
Institution:	NOAA/GLERL (Dataset ID: glos_tds_6b79_0b93_7cbd)
Information:	Summary \| License \| Metadata \| Background \| Make a graph

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Dimensions	Start	Stride	Stop	Size	Spacing
time (UTC)				52608	1h 0m 0s (even)

Grid Variables (which always also download all of the dimension variables)

time_run (run times for coordinate = time, seconds since 1970-01-01T00:00:00Z)

time_offset (seconds since 1970-01-01T00:00:00Z)

File type: (more info)

(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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.3253796e+9, 1.5147648e+9;
    String axis "T";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "Forecast time for ForecastModelRunCollection";
    Float64 missing_value NaN;
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  time_run {
    String _CoordinateAxisType "RunTime";
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "run times for coordinate = time";
    String standard_name "forecast_reference_time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  time_offset {
    String calendar "proleptic_gregorian";
    String ioos_category "Time";
    String long_name "offset hour from start of run for coordinate = time";
    String standard_name "forecast_period";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  NC_GLOBAL {
    String _CoordSysBuilder "ucar.nc2.dataset.conv.CF1Convention";
    String author "gregory.lang@noaa.gov";
    String cdm_data_type "Grid";
    String comment1 "Lake Ontario  5 km bathymetric grid";
    String comment2 "1-hourly model 2D output starting at validtime plus 1 hr";
    String comment3 "Generated 4x per day following the 0,6,12,18 Z Nowcast runs";
    String contributor_name "GLOS DMAC, GLERL";
    String contributor_role "distributor, producer";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String creation_date "Sat Dec 30 15:19:44 2017 GMT";
    String creator_email "david.schwab@noaa.gov";
    String creator_name "Dr. Dave Schwab";
    String creator_type "person";
    String creator_url "https://www.glerl.noaa.gov/";
    String disclaimer "https://www.glerl.noaa.gov/home/notice.html";
    String history 
"Sat Dec 30 15:19:48 2017: ncks -O --deflate=1 tmp/o201730100.out1.nc4 tmp/o201730100.out1.nc
Sat Dec 30 15:19:46 2017: ncks -O --fl_fmt=netcdf4_classic nc_files/o201730100.out1.nc tmp/o201730100.out1.nc4 ;
FMRC Best Dataset
2018-04-26T23:16:49Z http://tds.glos.us/thredds/dodsC/glos/glcfs/archiveall/ontario/ncfmrc-2d/Lake_Ontario_-_Nowcast_-_2D_-_All_Years_best.ncd
2018-04-26T23:16:49Z http://upwell.pfeg.noaa.gov/erddap/griddap/glos_tds_6b79_0b93_7cbd.das";
    String id "glos/glcfs/archiveall/ontario/ncfmrc-2d/Lake_Ontario_-_Nowcast_-_2D_-_All_Years_best.ncdhttp://tds.glos.us/thredds/dodsC/glos/glcfs/archiveall/ontario/ncfmrc-2d/Lake_Ontario_-_Nowcast_-_2D_-_All_Years_best.ncd";
    String infoUrl "https://www.glerl.noaa.gov/res/glcfs/";
    String institution "NOAA/GLERL";
    String keywords "all, best, best time series, coastal, coordinate, data, environmental, forecast, forecast_period, forecast_reference_time, forecasting, glcfs, glerl, glos, great, great lakes, hour, laboratory, lake, lakes, noaa, nowcast, observing, offset, ontario, period, reference, research, run, series, start, system, time, time series, time_offset, time_run, times, years";
    String license "No usage restrictions";
    String location "Proto fmrc:Lake_Ontario_-_Nowcast_-_2D_-_All_Years";
    String metadata_link "http://data.glos.us/portal/";
    String model "GLERL Wave Model-Great Lakes, Princeton Ocean Model-Great Lakes";
    String naming_authority "GLOS";
    String NCO "4.3.7";
    String publisher_email "dmac@glos.us";
    String publisher_name "GLOS DMAC";
    String publisher_type "institution";
    String publisher_url "https://www.glos.us";
    String references "https://www.glerl.noaa.gov/res/glcfs/";
    String sourceUrl "http://tds.glos.us/thredds/dodsC/glos/glcfs/archiveall/ontario/ncfmrc-2d/Lake_Ontario_-_Nowcast_-_2D_-_All_Years_best.ncd";
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "GLCFS - Lake Ontario - Nowcast - 2D. Best time series, taking the data from the most recent run available. Great Lakes Coastal Forecasting System. Lake Ontario  5 km bathymetric grid. 1-hourly model 2D output starting at validtime plus 1 hr. Generated 4x per day following the 0,6,12,18 Z Nowcast runs";
    String time_coverage_end "2018-01-01T00:00:00Z";
    String time_coverage_start "2012-01-01T01:00:00Z";
    String title "Lake Ontario, Nowcast, 2D, All Years, Lake Ontario, Nowcast, 2D, All Years, Best Time Series [time], 2012-present";
    String validtime "01-JAN-2013 00:00 GMT";
    String validtime_DOY "001, 2013 00:00 GMT";
  }
}

Using griddap to Request Data and Graphs from Gridded Datasets

griddap lets you request a data subset, graph, or map from a gridded dataset (for example, sea surface temperature data from a satellite), via a specially formed URL. griddap uses the OPeNDAP (external link)

Data Access Protocol (DAP) (external link)

and its projection 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. It makes 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.

griddap request URLs must be in the form
https://upwell.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://upwell.pfeg.noaa.gov/erddap/griddap/jplMURSST41.htmlTable?analysed_sst[(2002-06-01T09:00:00Z)][(-89.99):1000:(89.99)][(-179.99):1000:(180.0)]
Thus, the query is often a data variable name (e.g., analysed_sst), followed by [(start):stride:(stop)] (or a shorter variation of that) for each of the variable's dimensions (for example, [time][latitude][longitude]).

For details, see the griddap Documentation.