Data Access Form

Dataset Title:	EMODnet Physics - SALINITY ANOMALY 30 YEARS
Institution:	EMODnet Physics (Dataset ID: ERD_EP_PSAL_ANO_30Y)
Information:	Summary \| License \| FGDC \| ISO 19115 \| Metadata \| Background \| Files \| Make a graph

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Dimensions	Size	Spacing
time (UTC)	30	365 days 5h 47m 35s (uneven)

depth (m)	1	(just one value)

latitude (degrees_north)	545	0.3068139 (uneven)

longitude (degrees_east)	720	0.5 (even)

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

ANOMALY (psu)

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 6.31152e+8, 1.5463008e+9;
    String axis "T";
    String ioos_category "Time";
    String long_name "Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  depth {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "down";
    Int32 actual_range 0, 0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String standard_name "depth";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range -77.0104751586914, 89.8962631225586;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range -180.0, 179.5;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
  }
  ANOMALY {
    String ep_parameter_group "Water Salinity";
    String long_name "ANOMALY";
    String units "psu";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    Float64 Easternmost_Easting 179.5;
    Float64 geospatial_lat_max 89.8962631225586;
    Float64 geospatial_lat_min -77.0104751586914;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.5;
    Float64 geospatial_lon_min -180.0;
    Float64 geospatial_lon_resolution 0.5;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-11-21T12:29:36Z (local files)
2024-11-21T12:29:36Z http://erddap.emodnet-physics.eu/erddap/griddap/ERD_EP_PSAL_ANO_30Y.das";
    String infoUrl "https://portal.emodnet-physics.eu/";
    String institution "EMODnet Physics";
    String keywords "anomaly, data, latitude, local, longitude, source, time";
    String license "Creative Commons Attribution Share-Alike http://www.opendefinition.org/licenses/cc-by-sa";
    Float64 Northernmost_Northing 89.8962631225586;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -77.0104751586914;
    String standard_name_vocabulary "CF Standard Name Table v29";
    String summary "Data from a local source.";
    String time_coverage_end "2019-01-01T00:00:00Z";
    String time_coverage_start "1990-01-01T00:00:00Z";
    String title "EMODnet Physics - SALINITY ANOMALY 30 YEARS";
    Float64 Westernmost_Easting -180.0;
  }
}

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.