ERDDAP > griddap > Data Access Form

Dataset Title:	Test IPSL model output: Black Sea currents
Institution:	METU-IMS   (Dataset ID: IPSL_model_currents)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph

 

Dimensions	Start	Stride	Stop	Size	Spacing
time (Time axis, UTC)				91	1 day (even)
depth (m)				61	37.36626 (uneven)
latitude (degrees_north)				235	0.0278 (even)
longitude (degrees_east)				544	0.0278 (even)

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

Sea_currents_u (ocean current along i-axis, m/s)

Sea_currents_v (ocean current along j-axis, m/s)

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. .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. .esriAscii - Download an ISO-8859-1 ESRI ASCII file (latitude longitude data only; longitude must be all below or all above 180). .fgdc - View the dataset's UTF-8 FGDC .xml metadata. .graph - View a Make A Graph web page. .help - View a web page with a description of griddap. .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 axis variable and each data variable 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 NetCDF-3 binary file with COARDS/CF/ACDD metadata. .ncHeader - View the UTF-8 header (the metadata) for the NetCDF-3 .nc file. .ncml - View the dataset's structure and metadata as a UTF-8 NCML .xml 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 time,latitude,longitude,otherVariables as an ODV Generic Spreadsheet File (.txt). .timeGaps - View a UTF-8 list of gaps in the time values which are larger than the median gap. .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. .geotif - View a grayscale GeoTIFF .tif file (for latitude longitude data; longitude must be all below or all above 180). .kml - View a Google Earth .kml file (for latitude, longitude data only). .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 {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4516496e+9, 1.4594256e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Time axis";
    String source_name "time_counter";
    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";
    Float32 actual_range 2.499249, 2244.475;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Depth";
    String positive "down";
    String source_name "depthu";
    String standard_name "depth";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 40.6, 47.1052;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String source_name "y";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range 27.2, 42.2954;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String source_name "x";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Sea_currents_u {
    Float32 _FillValue 1.0e+20;
    String cell_methods "time: mean (interval: 360 s)";
    String interval_operation "360 s";
    String interval_write "1 d";
    String ioos_category "Currents";
    String long_name "ocean current along i-axis";
    Float32 missing_value 1.0e+20;
    String online_operation "average";
    String standard_name "sea_water_x_velocity";
    String units "m/s";
  }
  Sea_currents_v {
    Float32 _FillValue 1.0e+20;
    String cell_methods "time: mean (interval: 360 s)";
    String interval_operation "360 s";
    String interval_write "1 d";
    String ioos_category "Currents";
    String long_name "ocean current along j-axis";
    Float32 missing_value 1.0e+20;
    String online_operation "average";
    String standard_name "sea_water_y_velocity";
    String units "m/s";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, COARDS, ACDD-1.3";
    String defaultGraphQuery "[last][0][0:last][0:last]&.draw=vectors";
    String description "ocean U grid variables";
    Float64 Easternmost_Easting 42.2954;
    String file_name "BlackSea_1d_20160101_20160331_grid_U.nc";
    Float64 geospatial_lat_max 47.1052;
    Float64 geospatial_lat_min 40.6;
    Float64 geospatial_lat_resolution 0.02780000000000001;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 42.2954;
    Float64 geospatial_lon_min 27.2;
    Float64 geospatial_lon_resolution 0.027800000000000002;
    String geospatial_lon_units "degrees_east";
    String history 
"2024-12-25T20:17:32Z (local files)
2024-12-25T20:17:32Z http://erddap.bridgeblacksea.org:8080/erddap/griddap/IPSL_model_currents.das";
    Int32 ibegin 1;
    String infoUrl "http://www.ims.metu.edu.tr";
    String institution "METU-IMS";
    Int32 jbegin 1;
    String keywords "circulation, currents, Earth Science, ocean, sea water, u, velocity";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "The standard license for all data should be described here!!";
    String name "BlackSea_1d_20160101_20160331";
    Int32 ni 544;
    Int32 nj 2;
    Float64 Northernmost_Northing 47.1052;
    String production "An IPSL model";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 40.6;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Ocean U grid variables.";
    String time_coverage_end "2016-03-31T12:00:00Z";
    String time_coverage_start "2016-01-01T12:00:00Z";
    String TimeStamp "09/05/2022 11:01:14 +0300";
    String timeStamp "2022-May-01 15:38:50 +03";
    String title "Test IPSL model output: Black Sea currents";
    Float64 Westernmost_Easting 27.2;
  }
}

 

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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 Data Access Protocol (DAP) and its projection 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. 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.

 

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