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ERDDAP > griddap > Make A Graph ?

Dataset Title:  SST, AQUA_MODIS, L3m.DAY.SST.sst.4km.NRT, Not Masked, SMI, NASA GSFC OBPG,
R2019.0, Global, 0.04166°, Daily
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Institution:  NASA/GSFC OBPG   (Dataset ID: erdMH1sstd1dayR20190NotMasked)
Information:  Summary ? | License ? | FGDC | ISO 19115 | Metadata | Background (external link) | Data Access Form | Files
 
Graph Type:  ?
X Axis:  ?
Y Axis:  ?
Color:  ?
 
Dimensions ?    Start ?    Stop ?
time (UTC) ?     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 1.5725664e+9, 1.5934752e+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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 _FillValue -999.0;
    Float32 actual_range -89.97918, 89.97916;
    String axis "Y";
    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 _FillValue -999.0;
    Float32 actual_range -179.9792, 179.9792;
    String axis "X";
    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;
  }
  sst {
    Float32 _FillValue -163.835;
    Float64 colorBarMaximum 32.0;
    Float64 colorBarMinimum 0.0;
    String ioos_category "Temperature";
    String long_name "Sea Surface Temperature";
    String standard_name "sea_surface_temperature";
    String units "degree_C";
    Float32 valid_max 50.0;
    Float32 valid_min -5.0;
  }
  qual_sst {
    Int16 _FillValue -1;
    String _Unsigned "true";
    String colorBarContinuous "false";
    Float64 colorBarMaximum 5.0;
    Float64 colorBarMinimum 0.0;
    Int32 colorBarNSections 5;
    String ioos_category "Quality";
    String long_name "Quality Levels, Sea Surface Temperature";
    Int16 valid_max 5;
    Int16 valid_min 0;
  }
  NC_GLOBAL {
    String _lastModified "2020-07-01T09:42:04.000Z";
    String cdm_data_type "Grid";
    String Conventions "CF-1.6 ACDD-1.3, COARDS";
    String creator_email "data@oceancolor.gsfc.nasa.gov";
    String creator_name "NASA/GSFC/OBPG";
    String creator_type "group";
    String creator_url "https://oceandata.sci.gsfc.nasa.gov";
    String date_created "2020-07-01T09:42:04.000Z";
    Float64 Easternmost_Easting 179.9792;
    Float64 geospatial_lat_max 89.97916;
    Float64 geospatial_lat_min -89.97918;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 179.9792;
    Float64 geospatial_lon_min -179.9792;
    String geospatial_lon_units "degrees_east";
    String history 
"l3mapgen par=AQUA_MODIS.yyyyMMdd.L3m.DAY.SST.sst.4km.NRT.nc.param
Every day, erd.data@noaa.gov downloads new files from https://oceandata.sci.gsfc.nasa.gov/MODIS-Aqua/Mapped/Daily/4km/sst/
2020-07-02T10:36:28Z (local files)
2020-07-02T10:36:28Z http://coastwatch.pfeg.noaa.gov/griddap/erdMH1sstd1dayR20190NotMasked.das";
    String infoUrl "https://oceancolor.gsfc.nasa.gov/data/aqua/";
    String institution "NASA/GSFC OBPG";
    String instrument "MODIS";
    String keywords "aqua, biology, center, color, data, earth, Earth Science > Oceans > Ocean Optics > Sea Surface Temperature, Earth Science > Oceans > Ocean Temperature > Sea Surface Temperature, flight, goddard, group, gsfc, image, imaging, L3, level, level-3, levels, mapped, moderate, modis, modisa, nasa, obpg, ocean, oceans, optics, palette, processing, qual_sst, quality, resolution, science, sea, sea_surface_temperature, smi, space, spectroradiometer, sst, standard, surface, temperature";
    String keywords_vocabulary "GCMD Science Keywords";
    String l2_flag_names "LAND,HISOLZEN";
    String license "https://science.nasa.gov/earth-science/earth-science-data/data-information-policy/";
    String map_projection "Equidistant Cylindrical";
    String measure "Mean";
    String naming_authority "gov.nasa.gsfc.sci.oceandata";
    Float64 Northernmost_Northing 89.97916;
    String platform "Aqua";
    String processing_control_input_parameters_apply_pal "1";
    String processing_control_input_parameters_central_meridian "-999";
    String processing_control_input_parameters_deflate "4";
    String processing_control_input_parameters_east "180.000";
    String processing_control_input_parameters_fudge "1.0";
    String processing_control_input_parameters_full_latlon "yes";
    String processing_control_input_parameters_ifile "AQUA_MODIS.20200630.L3b.DAY.SST.NRT.nc";
    String processing_control_input_parameters_interp "area";
    String processing_control_input_parameters_land "$OCDATAROOT/common/landmask_GMT15ARC.nc";
    String processing_control_input_parameters_mask_land "no";
    String processing_control_input_parameters_north "90.000";
    String processing_control_input_parameters_num_cache "500";
    String processing_control_input_parameters_ofile "AQUA_MODIS.20200630.L3m.DAY.SST.sst.4km.NRT.nc";
    String processing_control_input_parameters_ofile_product_tag "PRODUCT";
    String processing_control_input_parameters_oformat "2";
    String processing_control_input_parameters_oformat2 "png";
    String processing_control_input_parameters_par "AQUA_MODIS.20200630.L3m.DAY.SST.sst.4km.NRT.nc.param";
    String processing_control_input_parameters_product "sst";
    String processing_control_input_parameters_product_rgb "rhos_645,rhos_555,rhos_469";
    String processing_control_input_parameters_projection "smi";
    String processing_control_input_parameters_pversion "R2019.0";
    String processing_control_input_parameters_quiet "false";
    String processing_control_input_parameters_resolution "4km";
    String processing_control_input_parameters_south "-90.000";
    String processing_control_input_parameters_suite "SST";
    String processing_control_input_parameters_threshold "0";
    String processing_control_input_parameters_trimNSEW "yes";
    String processing_control_input_parameters_use_quality "yes";
    String processing_control_input_parameters_use_rgb "no";
    String processing_control_input_parameters_use_transparency "no";
    String processing_control_input_parameters_west "-180.000";
    String processing_control_l2_flag_names "LAND,HISOLZEN";
    String processing_control_software_name "l3mapgen";
    String processing_control_software_version "2.3.0-b2c954b";
    String processing_control_source "AQUA_MODIS.20200630.L3b.DAY.SST.NRT.nc";
    String processing_level "L3 Mapped";
    String processing_version "R2019.0";
    String product_name "AQUA_MODIS.yyyyMMdd.L3m.DAY.SST.sst.4km.NRT.nc";
    String project "Ocean Biology Processing Group (NASA/GSFC/OBPG)";
    String publisher_email "data@oceancolor.gsfc.nasa.gov";
    String publisher_name "NASA/GSFC/OBPG";
    String publisher_type "group";
    String publisher_url "https://oceandata.sci.gsfc.nasa.gov";
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing -89.97918;
    String spatialResolution "4.64 km";
    String standard_name_vocabulary "CF Standard Name Table v36";
    String summary "Sea Surface Temperature (SST), not masked, from Moderate Resolution Imaging Spectroradiometer on Aqua (MODISA), Level-3 Standard Mapped Image (SMI), from NASA GSFC OBPG, R2019.0, Global, 0.04166°, Daily";
    String temporal_range "day";
    String testOutOfDate "now-2days";
    String time_coverage_end "2020-06-30T00:00:00Z";
    String time_coverage_start "2019-11-01T00:00:00Z";
    String title "SST, AQUA_MODIS, L3m.DAY.SST.sst.4km.NRT, Not Masked, SMI, NASA GSFC OBPG, R2019.0, Global, 0.04166°, Daily";
    Float64 Westernmost_Easting -179.9792;
  }
}

 

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.


 
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