Basic Analytical Functions of Giovanni

FunctionDescription
Lat-Lon Map, Time-averagedThis function provides a time-averaged 2D-map for a specified area. The values plotted are the mean (time average) value of the data product calculated for the specified time interval.
Time Series, Area-averaged:This function provides a line plot. The daily value of the data product, averaged over the entire specified area of interest, is plotted as a function of time for any specified time interval. Included are the number of grids with data values, standard deviation, min and max values in the area selected. A time series for a single point is also supported.
Time series generation takes time. Try using smaller spatial and temporal intervals to increase speed.
Animation Lat-Lon Maps:This function provides an area plot animation of the requested data product, in daily increments, for any specified time interval.
Time-Lon Hovmoller, Lon-averaged:This function provides a Hovmoller time vs. longitude map. For a specified area, the average daily value of the data product is displayed with longitude as the X-axis and time as the Y-axis.
Time-Lat Hovmoller, Lat-averaged:This function provides a Hovmoller time vs. latitude map. For a specified area, the average daily value of the data product is displayed with latitude as the X-axis and time as the Y-axis.

Projection Options for Area Plots

OptionDescription
Cylindrical Equidistant:Uses Equidistant Cylindrical (referred as 'Equirectangular', or 'Rectangular') projection of the globe with the Standard Parallel at the Equator. This converts the Globe into a Cartesian Grid. Each rectangular grid has the same size, shape and area. This Projection is also known as 'Simple Cylindrical', or 'Platt Carree'.
South Polar Stereo:Uses South Polar Stereo projection. This option will take user specified latitude range within southern hemisphere and prefix longitude range from 180W to 180E.
North Polar Stereo:Uses North Polar Stereo projection. This option will take user specified latitude range within northern hemisphere and prefix longitude range from 180W to 180E.
Robinson:Uses Robinson projection. This option will display global image in Robinson projection.

Color Options for Area and Hovmoller Plots

OptionDescription
Pre-defined:Uses the color palette with the pre-specified default range of assigned values. This may be a linear or logarithmic scale palette.
Dynamic:Uses the minimum and maximum values of the data product in the specified area to create a linear scale color palette.
Customized:Allows user specification of minimum and maximum values for the color palette. A linear scale color palette will be created based on these minimum and maximum values.

Y-Axis Options for Time Series Plots

OptionDescription
Dynamic:Dynamically sets the minimum, maximum, and interval values for the Time Series Plot Y-axis.
Customized:Allows user to specify the minimum, maximum, and interval values for the Time Series Plot Y-axis.

How To Acknowledge The GES-DISC DAAC

The images and data generated by Giovanni are not copyrighted; however, if you publish the images and data or results using these images and data, we request that you include the following acknowledgment:

"The images and data used in this study were acquired using the GES-DISC Interactive Online Visualization ANd aNalysis Infrastructure (Giovanni) as part of the NASA's Goddard Earth Sciences (GES) Data and Information Services Center (DISC)."

We would appreciate receiving a copy of your publication, which can be forwarded to the following address:

Goddard DAAC Help Desk
Code 610.2
NASA/Goddard Space Flight Center
Greenbelt, MD 20771

Or, you may email the publication reference to help-disc@listserv.gsfc.nasa.gov.

NASA Responsible NASA Official: Steve Kempler
Web Curator: Stephen W Berrick
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Last Updated: July 23, 2004 09:44:52 EDT