NOAA ERDDAP
Easier access to scientific data
log in    
Brought to you by NOAA NMFS SWFSC ERD    

ERDDAP > griddap > Make A Graph ?

Dataset Title:  Sea Surface Salinity, Near Real Time, SMAP Daily
Composite (smapSSS3ScanDailyAggLoM), CoastWatch v4.2, 0.25°, 2015-present
Subscribe RSS
Institution:  NOAA NESDIS STAR   (Dataset ID: coastwatchSMAPV42SSS1day)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form
 
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Color:  ?
 
Dimensions ?    Start ?    Stop ?
time (UTC) ?     specify just 1 value →
    |< -
< <
altitude (m) ?     specify just 1 value →
   
< <
latitude (degrees_north) ?
    +
    -
< slider >
longitude (degrees_east) ?
    +
    -
< slider >
 
Graph Settings
Color Bar:   Continuity:   Scale: 
   Minimum:   Maximum:   N Sections: 
Draw land mask: 
Y Axis Minimum:   Maximum:   
 
(Please be patient. It may take a while to get the data.)
 
Optional:
Then set the File Type: (File Type information)
and
or view the URL:
(Documentation / Bypass this form ? )
    Click on the map to specify a new center point. ?
Zoom:
[The graph you specified. Please be patient.]

 

Things You Can Do With Your Graphs

Well, you can do anything you want with your graphs, of course. But some things you might not have considered are:

The Dataset Attribute Structure (.das) for this Dataset

Attributes {
  time {
    String _CoordinateAxisType "Time";
    Float64 actual_range 1.4278896e+9, 1.5736464e+9;
    String axis "T";
    String calendar "gregorian";
    String coverage_content_type "coordinate";
    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 coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Altitude";
    String positive "up";
    String standard_name "altitude";
    String units "m";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range -89.875, 89.875;
    String axis "Y";
    String comment "Latitude values are the centers of the grid cells";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Latitude";
    String standard_name "latitude";
    String units "degrees_north";
    Float32 valid_max 90.0;
    Float32 valid_min -90.0;
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -179.875, 179.875;
    String axis "X";
    String comment "Longitude values are the centers of the grid cells";
    String coverage_content_type "coordinate";
    String ioos_category "Location";
    String long_name "Longitude";
    String standard_name "longitude";
    String units "degrees_east";
    Float32 valid_max 180.0;
    Float32 valid_min -180.0;
  }
  sss {
    Float32 _FillValue NaN;
    String C_format "%.4g";
    String cell_methods "time: point";
    Float64 colorBarMaximum 37.0;
    Float64 colorBarMinimum 32.0;
    String coverage_content_type "physicalMeasurement";
    String grid_mapping "coord_ref";
    String ioos_category "Salinity";
    String long_name "SMAP Sea Surface Salinity";
    String standard_name "sea_water_practical_salinity";
    String units "PSU";
  }
  sss_dif {
    Float32 _FillValue NaN;
    String C_format "%.4g";
    String cell_methods "time: point";
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum -5.0;
    String comment "SMAP Sea Surface Salinity minus World Ocean Atlas Monthly Analyzed Sea Surface Salinity, generated for QA and validation";
    String coverage_content_type "qualitifyInformation";
    String ioos_category "Salinity";
    String long_name "SMAP Sea Surface Salinity minus World Ocean Atlas Value";
    String standard_name "sea_water_practical_salinity";
    String units "PSU";
  }
  ssw {
    Float32 _FillValue NaN;
    String C_format "%.4g";
    Float64 colorBarMaximum 15.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Wind";
    String long_name "SMAP Wind Speed";
    String standard_name "wind_speed";
    String units "m/sec";
  }
  l2_time {
    String comment "Time values are the middle of L2 files time coverage (start_time+end_time)/2";
    String ioos_category "Time";
    String long_name "Time from L2 files";
    String standard_name "time";
    String time_origin "01-JAN-1970 00:00:00";
    String units "seconds since 1970-01-01T00:00:00Z";
  }
  l2_lat {
    Float32 _FillValue NaN;
    String C_format "%.4g";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Latitude from L2 files";
    String standard_name "latitude";
    String units "degrees_north";
  }
  l2_lon {
    Float32 _FillValue NaN;
    String C_format "%.4g";
    Float64 colorBarMaximum 90.0;
    Float64 colorBarMinimum -90.0;
    String ioos_category "Location";
    String long_name "Longitude from L2 files";
    String standard_name "longitude";
    String units "degrees_north";
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String Conventions "CF-1.6, ACDD-1.3, COARDS";
    String creator_email "coastwatch.info@noaa.gov";
    String creator_name "NOAA CoastWatch";
    String creator_type "institution";
    String creator_url "https://coastwatch.noaa.gov";
    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 geospatial_vertical_max 0.0;
    Float64 geospatial_vertical_min 0.0;
    String geospatial_vertical_positive "up";
    String geospatial_vertical_units "m";
    String history 
"Tue Nov 12 19:30:03 2019
: /data/data001/development/hgu/4sqm/bin/l3smap_gen -n -l -a 2 -w /data/data001/development/hgu/4sqm/NODC_salinity/WOA13/woa13_decav_s11_04v2.nc -V V4.2_NRT /data/data001/development/hgu/4sqm/config/.Config_SMAP.input /data/www/socd/mecb/coastwatch/smap/nc/SP_D2019316_Map_SATSSS_data_1day.nc
2019-11-14T14:03:58Z https://coastwatch.noaa.gov/thredds/dodsC/smapSSS3ScanDailyAggLoM
2019-11-14T14:03:58Z http://coastwatch.pfeg.noaa.gov/griddap/coastwatchSMAPV42SSS1day.das";
    String infoUrl "https://coastwatch.noaa.gov/cw/satellite-data-products/sea-surface-salinity/smap.html";
    String institution "NOAA NESDIS STAR";
    String instrument "SMAP";
    String keywords "agencies, agencies-u.s, altitude, atlas, atmosphere, atmospheric, atmospheric/ocean, climate, coastwatch, commerce, composite, daily, data, day, density, department, doc, doc/noaa/nesdis/star, earth, earth observation satellites>earth explorers>smos>soil moisture and ocean salinity, earth remote sensing instruments>passive remote sensing>imaging spectrometers/radiometers>smap l-band radiometer, Earth Science > Atmosphere > Atmospheric Winds > Surface Winds, Earth Science > Climate Indicators > Atmospheric/Ocean Indicators > Surface Salinity, Earth Science > Oceans > Salinity/Density > Salinity, federal, files, gcmd, GCMD:EARTH SCIENCE > OCEANS > SALINITY/DENSITY, government, GOVERNMENT AGENCIES-U.S. FEDERAL AGENCIES > DOC > NOAA, indicators, jet, jpl, L2, l2_lat, l2_lon, l2_time, laboratory, latitude, longitude, minus, near, near real time, noaa, none:soil moisture active passive, nrt, ocean, oceans, practical, propulsion, real, salinity, salinity/density, science, sea, sea surface salinity, sea_water_practical_salinity, seawater, smap, smapsss3scandailyagglom, speed, sss, sss_dif, ssw, star, surface, time, US, value, water, wind, wind_speed, winds, world";
    String keywords_vocabulary "GCMD Science Keywords";
    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 mission "Soil Moisture Active Passive (SMAP)";
    String naming_authority "gov.noaa.coastwatch";
    Float64 Northernmost_Northing 89.875;
    String platform "SMAP";
    String product_name "SP_D2019316_Map_SATSSS_data_1day.nc";
    String product_version "V4.2_NRT";
    String project "STAR Sea Surface Salinity Team (NOAA/NESDIS/STAR/SSS)";
    String publisher_email "coastwatch.info@noaa.gov";
    String publisher_name "NOAA CoastWatch";
    String publisher_type "institution";
    String publisher_url "https://coastwatch.noaa.gov";
    String references "SMAP Salinity and Wind Speed User's Guide, Version 4.0, JPL";
    String source "NASA JPL";
    String sourceUrl "https://coastwatch.noaa.gov/thredds/dodsC/smapSSS3ScanDailyAggLoM";
    Float64 Southernmost_Northing -89.875;
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Sea Surface Salinity - Near Real Time - SMAP Daily Composite. CoastWatch/OceanWatch Level-3 SSS products are generated directly from the NASA Jet Propulsion Laboratory (JPL) SMAP Level-2B SSS near real time swath HDF5 files. These products improve the application of satellite SSS products in NOAA by minimizing the data latency to within 24 hours of Level-2 data availability";
    String testOutOfDate "now-5days";
    String time_coverage_end "2019-11-13T12:00:00Z";
    String time_coverage_start "2015-04-01T12:00:00Z";
    String time_coverage_stop "2019-316T19:08:22.000";
    String title "Sea Surface Salinity, Near Real Time, SMAP Daily Composite (smapSSS3ScanDailyAggLoM), CoastWatch v4.2, 0.25°, 2015-present";
    Float64 Westernmost_Easting -179.875;
  }
}

 

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.

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.


 
ERDDAP, Version 2.02
Disclaimers | Privacy Policy | Contact