ERDDAP > griddap > Data Access Form

Dataset Title:	Sea Surface Temperature, S-NPP VIIRS, Near Real-Time, Daily Merge, ~1km, Gulf of America (mercator)
Institution:	NOAA/NESDIS/OSPO   (Dataset ID: noaacwNPPnightsstgm05)
Information:	Summary | License | Metadata | Background | Make a graph

 

Dimensions	Start	Stride	Stop	Size	Spacing
time (Centered Time, UTC)				955	1 day 3h 58m 26s (uneven)
altitude (m)				1	(just one value)
rows (km)				2045	-0.834 (even)
cols (km)				2674	0.834 (even)

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

l2p_flags

swath_latitude (Latitude, degrees_north)

swath_longitude (Longitude, degrees_east)

sea_surface_temperature (degree_C)

sses_bias (SSES bias estimate, degree_C)

sses_standard_deviation (degree_C)

graphics (graphics overlay planes)

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 1.6480223995e+9, 1.744096199e+9;
    String axis "T";
    String calendar "gregorian";
    String ioos_category "Time";
    String long_name "Centered Time";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  altitude {
    String _CoordinateAxisType "Height";
    String _CoordinateZisPositive "up";
    Float64 actual_range 0.0, 0.0;
    String axis "Z";
    String ioos_category "Location";
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  rows {
    Float64 actual_range 1907.497, 3612.193;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Northing of Pixel Centers";
    String standard_name "projection_y_coordinate";
    String units "km";
  }
  cols {
    Float64 actual_range -11022.283, -8793.001;
    String axis "X";
    String ioos_category "Location";
    String long_name "Easting of Pixel Centers";
    String standard_name "projection_x_coordinate";
    String units "km";
  }
  l2p_flags {
    Int16 _FillValue 32767;
    Float64 colorBarMaximum 0.0;
    Float64 colorBarMinimum -15000.0;
    Int16 flag_masks 1, 2, 4, 256, 512, 1024, 2048, 4096, 8192, -16384;
    String flag_meanings "microwave land ice invalid day land twilight glint ice probably_clear_or_cloudy_or_undefined";
    String ioos_category "Quality";
    String long_name "L2P flags";
    Int16 valid_max 32767;
    Int16 valid_min -32768;
  }
  swath_latitude {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    Int32 cw_fraction_digits 4;
    String ioos_category "Location";
    String long_name "Latitude";
    Float32 missing_value NaN;
    String units "degrees_north";
  }
  swath_longitude {
    Float32 _FillValue NaN;
    Float64 colorBarMaximum 180.0;
    Float64 colorBarMinimum -180.0;
    Int32 cw_fraction_digits 4;
    String ioos_category "Location";
    String long_name "Longitude";
    Float32 missing_value NaN;
    String units "degrees_east";
  }
  sea_surface_temperature {
    Float64 _FillValue -327.67999877929685;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String cw_atmospheric_correction "Advanced Clear-Sky Processor for Oceans (ACSPO)-VIIRS";
    Int32 cw_fraction_digits 14;
    String ioos_category "Temperature";
    String long_name "sea surface sub-skin temperature";
    Float64 missing_value -327.67999877929685;
    String source "NOAA";
    String standard_name "sea_surface_subskin_temperature";
    String units "degree_C";
    Float64 valid_max 327.66998657248917;
    Float64 valid_min -2.0000060588121187;
  }
  sses_bias {
    Float64 _FillValue -2.0480000972747803;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    Int32 cw_fraction_digits 15;
    String ioos_category "Statistics";
    String long_name "SSES bias estimate";
    Float64 missing_value -2.0480000972747803;
    String units "degree_C";
    Float64 valid_max 2.032000096514821;
    Float64 valid_min -2.032000096514821;
  }
  sses_standard_deviation {
    Float64 _FillValue -0.2799999713897705;
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    Int32 cw_fraction_digits 15;
    String ioos_category "Statistics";
    String long_name "SSES standard deviation";
    Float64 missing_value -0.2799999713897705;
    String units "degree_C";
    Float64 valid_max 2.269999971613288;
    Float64 valid_min -0.2699999716132879;
  }
  graphics {
    Byte _FillValue 0;
    String _Unsigned "true";
    Float64 colorBarMaximum 20.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Optical Properties";
    String long_name "graphics overlay planes";
    Byte missing_value 0;
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.10, COARDS, ACDD-1.3";
    String creator_email "veronica.lance@noaa.gov";
    String creator_name "Veronica Lance";
    String creator_type "person";
    String creator_url "http://www.star.nesdis.noaa.gov";
    String crs_wkt "PROJCS[\"WGS 84 / World Mercator\",GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4326\"]],PROJECTION[\"Mercator_1SP\"],PARAMETER[\"central_meridian\",0],PARAMETER[\"scale_factor\",1],PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0],UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],AXIS[\"Easting\",EAST],AXIS[\"Northing\",NORTH],AUTHORITY[\"EPSG\",\"3395\"]]";
    String cw_pass_type "day/night";
    Float64 cw_polygon_latitude 31.011202805616843, 31.011202805616843, 31.011202805616843, 31.011202805616843, 31.011202805616843, 27.657400535179807, 24.19634433947558, 20.637649649963503, 16.992721384236127, 16.992721384236127, 16.992721384236127, 16.992721384236127, 16.992721384236127, 20.637649649963503, 24.19634433947558, 27.657400535179807, 31.011202805616843;
    Float64 cw_polygon_longitude -99.0148528479077, -94.00835761487637, -89.00186238184503, -83.9953671488137, -78.98887191578237, -78.98887191578237, -78.98887191578237, -78.98887191578237, -78.98887191578237, -83.9953671488137, -89.00186238184503, -94.00835761487637, -99.0148528479077, -99.0148528479077, -99.0148528479077, -99.0148528479077, -99.0148528479077;
    String cw_projection "Mercator";
    String cw_satellite "S-NPP";
    String cw_sensor "VIIRS";
    String cw_software_name "ACSPO";
    String cw_software_version "2.80";
    Int32 cw_swath_sync_lines 1, 1, 1, 1;
    String date_created "2025-04-09T06:07:41Z";
    String geospatial_bounds "POLYGON((-99.014853 31.011203,-94.008358 31.011203,-89.001862 31.011203,-83.995367 31.011203,-78.988872 31.011203,-78.988872 27.657401,-78.988872 24.196344,-78.988872 20.63765,-78.988872 16.992721,-83.995367 16.992721,-89.001862 16.992721,-94.008358 16.992721,-99.014853 16.992721,-99.014853 20.63765,-99.014853 24.196344,-99.014853 27.657401,-99.014853 31.011203))";
    Float64 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    String grid_mapping_crs_wkt "PROJCS[\"WGS 84 / World Mercator\",GEOGCS[\"WGS 84\",DATUM[\"WGS_1984\",SPHEROID[\"WGS 84\",6378137,298.257223563,AUTHORITY[\"EPSG\",\"7030\"]],AUTHORITY[\"EPSG\",\"6326\"]],PRIMEM[\"Greenwich\",0,AUTHORITY[\"EPSG\",\"8901\"]],UNIT[\"degree\",0.0174532925199433,AUTHORITY[\"EPSG\",\"9122\"]],AUTHORITY[\"EPSG\",\"4326\"]],PROJECTION[\"Mercator_1SP\"],PARAMETER[\"central_meridian\",0],PARAMETER[\"scale_factor\",1],PARAMETER[\"false_easting\",0],PARAMETER[\"false_northing\",0],UNIT[\"metre\",1,AUTHORITY[\"EPSG\",\"9001\"]],AXIS[\"Easting\",EAST],AXIS[\"Northing\",NORTH],AUTHORITY[\"EPSG\",\"3395\"]]";
    Float64 grid_mapping_false_easting 0.0;
    Float64 grid_mapping_false_northing 0.0;
    Float64 grid_mapping_inverse_flattening 298.257223563;
    Float64 grid_mapping_longitude_of_projection_origin 0.0;
    String grid_mapping_name "mercator";
    String grid_mapping_proj4text "+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs";
    Float64 grid_mapping_semi_major_axis 6378137.0;
    String grid_mapping_srid "EPSG:3395";
    Float64 grid_mapping_standard_parallel 0.0;
    String history 
"[cwutils 4.0.1.7 20240513_133416] cwcomposite --pedantic --coherent sea_surface_temperature/latitude --optimal satellite_zenith_angle/minabs --method optimal --inputs - --match ^(l2p_flags|satellite_zenith_angle|latitude|longitude|sses_standard_deviation|sses_bias|sea_surface_temperature)$ /home/pub/svc_cwatch/aps/aps_b/browse/lvl4/modis/coastwatch/hdf/VSSTNCW_B2025098_C4_060959_062001_075001_080001_GM05_mixed_seasurfacetemperature.hdf
[cwutils 4.0.1.7 20240513_133416] cwgraphics /home/pub/svc_cwatch/aps/aps_b/browse/lvl4/modis/coastwatch/hdf/VSSTNCW_B2025098_C4_060959_062001_075001_080001_GM05_mixed_seasurfacetemperature.hdf
2025-04-10T03:13:05Z (local files)
2025-04-10T03:13:05Z https://coastwatch.noaa.gov/erddap/griddap/noaacwNPPnightsstgm05.das";
    String infoUrl "http://www.star.nesdis.noaa.gov";
    String institution "NOAA/NESDIS/OSPO";
    String instrument "VIIRS";
    String keywords "altitude, bias, cols, daily, data, day, deviation, earth, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, environmental, error, estimate, flags, graphics, imager, imager/radiometer, imaging, information, infrared, l2p, l2p_flags, latitude, longitude, merge, national, nesdis, noaa, npp, ocean, oceans, office, operations, optical, optical properties, orbiting, osdpd, ospo, overlay, partnership, planes, polar, polar-orbiting, product, properties, quality, radiometer, rows, s-npp, satellite, science, sea, sea_surface_subskin_temperature, sea_surface_temperature, seasurfacetemperature, sensor, service, single, skin, sses, sses_bias, sses_standard_deviation, sst, standard, statistics, sub, sub-skin, subskin, suite, surface, swath_latitude, swath_longitude, temperature, time, viirs, visible";
    String keywords_vocabulary "GCMD Science Keywords";
    String license "GHRSST protocol describes data use as free and open";
    String naming_authority "org.ghrsst";
    String OBSERVED_PROPERTY "sea_surface_temperature";
    String platform "S-NPP";
    String processing_level "L2P";
    String proj4text "+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs";
    String project "Group for High Resolution Sea Surface Temperature";
    String publisher_email "ghrsst-po@nceo.ac.uk";
    String publisher_name "The GHRSST Project Office";
    String publisher_type "group";
    String publisher_url "https://www.ghrsst.org";
    String source "S-NPP_VIIRS_seasurfacetemperature";
    String sourceUrl "(local files)";
    String srid "EPSG:3395";
    String standard_name_vocabulary "CF Standard Name Table v79";
    String summary "Sea surface temperature retrievals produced by NOAA/NESDIS/Office of Satellite and Product Operations (OSPO) office from Visible and Infrared Imager/Radiometer Suite (VIIRS) sensor";
    String testOutOfDate "now-5days";
    String time_coverage_end "2025-04-08T07:09:59Z";
    String time_coverage_start "2022-03-23T07:59:59Z";
    String title "Sea Surface Temperature, S-NPP VIIRS, Near Real-Time, Daily Merge, ~1km, Gulf of America (mercator)";
  }
}

 

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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.