ERDDAP > griddap > Data Access Form

Dataset Title:	Soil Moisture, NOAA Soil Moisture Products System (SMOPS) Climate Data Record, 25km, Global, Daily
Institution:	NOAA/NESDIS Center for Satellite Applications and Research   (Dataset ID: noaacwSMcdrDaily)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Make a graph

 

Dimensions	Start	Stride	Stop	Size	Spacing
time (UTC)				7489	1 day (even)
latitude (degrees_north)				720	-0.25 (even)
longitude (degrees_east)				1440	0.25 (even)

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

sm (SMOPS Climate Data Record Soil Moisture, m^3/m^3)

q_flag (Quality flag)

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 1.0254816e+9, 1.6724448e+9;
    String axis "T";
    String calendar "gregorian";
    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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -89.875, 89.875;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 89.875;
    Float32 valid_min -89.875;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.875, 179.875;
    String axis "X";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 179.875;
    Float32 valid_min -179.875;
  }
  sm {
    Float64 _FillValue -9999.0;
    Float64 colorBarMaximum 1.0;
    Float64 colorBarMinimum 0.0;
    String init_time "20090713_000000";
    String init_time_ut "1247443200";
    String ioos_category "Soils";
    String level_desc "Surface";
    String long_name "SMOPS Climate Data Record Soil Moisture";
    Float64 missing_value -9999.0;
    String name "sm";
    String standard_name "volume_fraction_of_condensed_water_in_soil";
    String units "m^3/m^3";
    String valid_time "20090713_000000";
    String valid_time_ut "1247443200";
  }
  q_flag {
    Int16 _FillValue 0;
    Float64 colorBarMaximum 150.0;
    Float64 colorBarMinimum 0.0;
    String flag_meanings "good_quality suspect_quality outside_range";
    String init_time "20090713_000000";
    String init_time_ut "1247443200";
    String ioos_category "Quality";
    String level_desc "Surface";
    String long_name "Quality flag";
    Int16 missing_value 0;
    String name "QA";
    String standard_name "status_flag";
    Int16 valid_range -32768, 32767;
    String valid_time "20090713_000000";
    String valid_time_ut "1247443200";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String comment "Science Lead: Jifu Yin, UMD/ESSIC/CISESS, jifu.yin@noaa.gov";
    String Conventions "CF-1.10, ACDD, COARDS";
    String creator_email "xiwu.zhan@noaa.gov";
    String creator_name "NOAA/NESDIS/STAR/SMCD";
    String creator_type "institution";
    String creator_url "https://www.star.nesdis.noaa.gov/star/smcd.php";
    String defaultGraphQuery "noaacwSMcdrDaily.graph?sm%5B(2022-12-31T00:00:00Z)%5D%5B(89.875):(-89.875)%5D%5B(-179.875):(179.875)%5D%26.draw=surface%26.vars=longitude%7Clatitude%7Csm%26.colorBar=%7C%7C%7C%7C%7C%26.land=under%26.bgColor=0xffccccff";
    Float64 Easternmost_Easting 179.875;
    Float64 geospatial_lat_max 89.875;
    Float64 geospatial_lat_min -89.875;
    Float64 geospatial_lat_resolution 0.25;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.875;
    Float64 geospatial_lon_min -179.875;
    Float64 geospatial_lon_resolution 0.25;
    String geospatial_lon_units "degrees_east";
    Float64 grid_mapping_inverse_flattening 298.257;
    String grid_mapping_name "latitude_longitude";
    Float64 grid_mapping_semi_major_axis 6378136.3;
    String history 
"2025-04-09T19:15:49Z (local files)
2025-04-09T19:15:49Z https://coastwatch.noaa.gov/erddap/griddap/noaacwSMcdrDaily.das";
    String infoUrl "https://doi.org/10.3390/rs14071700";
    String institution "NOAA/NESDIS Center for Satellite Applications and Research";
    String instrument "MIRAS,ASCAT,AMSR2,AMSRE,SMAP";
    String keywords "applications, cdr, center, climate, condensed, content, data, earth, Earth Science > Land Surface > Soils > Soil Moisture/Water Content, environmental, flag, fraction, information, land, moisture, moisture/water, national, nesdis, netcdf4, noaa, product, products, q_flag, quality, record, research, satellite, science, service, smops, smops-cdr, soil, soils, status, status_flag, surface, system, time, volume, volume_fraction_of_condensed_water_in_soil, water";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "CC0-1.0";
    String NCO "netCDF Operators version 4.7.5 (Homepage = http://nco.sf.net, Code = https://github.com/nco/nco)";
    Float64 Northernmost_Northing 89.875;
    String platform "SMOS,MetOp-A,MetOp-B,GCOM-W1,AMSR-E,SMAP";
    String Projection "Plate Carree (Equirectangular Projection)";
    String publisher_email "xiwu.zhan@noaa.gov";
    String publisher_name "NOAA/NESDIS/STAR";
    String publisher_type "institution";
    String publisher_url "https://www.star.nesdis.noaa.gov/star/smcd.php";
    String references "https://doi.org/10.3390/rs14071700";
    String source "Multi-platform/sensor";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.875;
    String standard_name_vocabulary "CF Standard Name Table v70";
    String summary "Science Lead: Jifu Yin, UMD/ESSIC/CISESS, jifu.yin@noaa.gov";
    String time_coverage_end "2022-12-31T00:00:00Z";
    String time_coverage_start "2002-07-01T00:00:00Z";
    String title "Soil Moisture, NOAA Soil Moisture Products System (SMOPS) Climate Data Record, 25km, Global, Daily";
    Float64 Westernmost_Easting -179.875;
  }
}

 

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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.