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ERDDAP > griddap > Make A Graph ?

Dataset Title:  Primary Productivity, Aqua MODIS, NPP, West Coast, 3-Day, 2003-present,
EXPERIMENTAL
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Institution:  NOAA NMFS SWFSC ERD   (Dataset ID: erdMWpp3day)
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:   Ascending: 
 
(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 1.0415088e+9, 1.5418512e+9;
    String axis "T";
    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";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float64 actual_range 22.0, 51.0;
    String axis "Y";
    String coordsys "geographic";
    String ioos_category "Location";
    String long_name "Latitude";
    String point_spacing "even";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float64 actual_range 205.0, 255.0;
    String axis "X";
    String coordsys "geographic";
    String ioos_category "Location";
    String long_name "Longitude";
    String point_spacing "even";
    String standard_name "longitude";
    String units "degrees_east";
  }
  productivity {
    Float32 _FillValue -99999.0;
    Float64 colorBarMaximum 2000.0;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "WhiteRedBlack";
    String coordsys "geographic";
    String ioos_category "Productivity";
    String long_name "Net Primary Productivity Of Carbon";
    Float32 missing_value -99999.0;
    String standard_name "net_primary_productivity_of_carbon";
    String units "mg C m-2 day-1";
  }
  nobs {
    Float64 colorBarMaximum 4.0;
    Float64 colorBarMinimum 0.0;
    String colorBarPalette "WhiteRedBlack";
    String ioos_category "Statistics";
    String long_name "Number of Observations in Composite";
    Int32 missing_value -99999;
  }
  NC_GLOBAL {
    String cdm_data_type "Grid";
    String contact "https://www.pfeg.noaa.gov/guest_book.html";
    String Conventions "Conventions: CF-1.6, COARDS, ACDD-1.3";
    String creation_date "Sun Nov 11 09:30:04 2018";
    String creator_email "erd.data@noaa.gov";
    String creator_name "NOAA NMFS SWFSC ERD";
    String creator_type "institution";
    String creator_url "https://www.pfeg.noaa.gov";
    Float64 Easternmost_Easting 255.0;
    Float64 geospatial_lat_max 51.0;
    Float64 geospatial_lat_min 22.0;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max 255.0;
    Float64 geospatial_lon_min 205.0;
    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 
"2018-11-13T18:55:13Z https://oceanwatch.pfeg.noaa.gov/thredds/dodsC/satellite/PPMW/3day
2018-11-13T18:55:13Z http://coastwatch.pfeg.noaa.gov/griddap/erdMWpp3day.das";
    String infoUrl "https://oceanwatch.pfeg.noaa.gov/thredds/dodsC/satellite/PPMW/3day.html";
    String institution "NOAA NMFS SWFSC ERD";
    String keywords "aqua, biosphere, carbon, chemistry, coast, dynamics, Earth Science > Biosphere > Ecological Dynamics > Ecosystem Functions > Primary Production, Earth Science > Biosphere > Vegetation > Carbon, Earth Science > Oceans > Ocean Chemistry > Carbon, ecological, ecosystem, erd, experimental, functions, modis, net, net_primary_productivity_of_carbon, noaa, npp, ocean, oceans, primary, production, productivity, vegetation, west, west coast";
    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 naming_authority "gov.noaa.pfeg.coastwatch";
    Float64 Northernmost_Northing 51.0;
    String publisher_email "erd.data@noaa.gov";
    String publisher_name "NOAA NMFS SWFSC ERD";
    String publisher_type "institution";
    String publisher_url "https://www.pfeg.noaa.gov";
    String references "Behrenfield and Falkowski, L&O 1997";
    String rights "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, CoastWatch, 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 sourceUrl "https://oceanwatch.pfeg.noaa.gov/thredds/dodsC/satellite/PPMW/3day";
    Float64 Southernmost_Northing 22.0;
    String spatial_resolution "0.0125 degree";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "Primary Productivity is calculated from NASA Aqua MODIS Chl_a, SST and Par data using the Behrenfield-Falkowski method (Behrenfield and Falkowski, Limnology and Oceanography 1997). THIS IS AN EXPERIMENTAL PRODUCT: intended strictly for scientific evaluation by professional marine scientists.";
    String testOutOfDate "now-4days";
    String time_coverage_end "2018-11-10T12:00:00Z";
    String time_coverage_start "2003-01-02T12:00:00Z";
    String title "Primary Productivity, Aqua MODIS, NPP, West Coast, 3-Day, 2003-present, EXPERIMENTAL";
    Float64 Westernmost_Easting 205.0;
  }
}

 

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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