Data Access Form

Dataset Title:	NEMO Eco3M daily Chl simulation by Guyennon
Institution:	MIO UMR7294 CNRS / OSU Pytheas (Dataset ID: chltot_daily_41d1_7136_76e7)
Information:	Summary \| License \| Metadata \| Background \| Make a graph

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Dimensions	Size	Spacing
time (Time axis, UTC)	60	1 day (even)

depth (m)	29	11.34405 (uneven)

y (count)	264	1.0 (even)

x (count)	567	1.0 (even)

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

Chltot

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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 9.46728e+8, 9.518256e+8;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time axis";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String title "Time";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Float32 actual_range 0.4940254, 318.1274;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String title "deptht";
    String units "m";
    Float32 valid_max 5727.9165;
    Float32 valid_min 0.49402538;
  }
  y {
    Int16 actual_range 0, 263;
    String ioos_category "Location";
    String long_name "Y";
    String units "count";
  }
  x {
    Int16 actual_range 0, 566;
    String ioos_category "Location";
    String long_name "X";
    String units "count";
  }
  Chltot {
    Float32 _FillValue 9.96921e+36;
    Float32 interval_operation 1200.0;
    Float32 interval_write 86400.0;
    String ioos_category "Unknown";
    String long_name "Chltot";
    String online_operation "ave(X)";
    String standard_name "chltot";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String file_name "/workgpfs/rech/ron/rron962/chlt200002/Chlt_2000_02.nc";
    String history 
"Fri Nov 21 15:35:37 2014: ncks -O -d deptht,0,28 -v Chltot Chlt_2000_02.nc Chlt_2000_02_extr.nc
2024-10-30T05:42:38Z (local files)
2024-10-30T05:42:38Z http://erddap.osupytheas.fr/erddap/griddap/chltot_daily_41d1_7136_76e7.das";
    String infoUrl "???";
    String institution "MIO UMR7294 CNRS / OSU Pytheas";
    String keywords "chltot, data, deptht, local, source, time_counter";
    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.";
    String NCO "4.4.2";
    String production "An IPSL model";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Data from a local source.";
    String time_coverage_end "2000-02-29T12:00:00Z";
    String time_coverage_start "2000-01-01T12:00:00Z";
    String TimeStamp "2014-JUN-06 06:54:12 GMT+0200";
    String title "NEMO Eco3M daily Chl simulation by Guyennon";
  }
}

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://coastwatch.pfeg.noaa.gov/erddap/griddap/datasetID.fileType{?query}
For example,
https://coastwatch.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.