Basic Analytical Functions/Options of Giovanni

Skip to giovanni list + Plot Type Description
+ Color Options for Lat-Lon Map and Hovmoller Plots
+ Y-Axis Options for Time Series
+ Resolution Options for Lat/Lon and Hovmoller ASCII Outputs
+ Unit Options on Resultant Image Page
+ How To Acknowledge The GES-DISC DAAC

Plot Type Options

Plot Type Description
Lat-Lon Map, Time-averaged: This plot type provides a time-averaged data plot 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 plot type provides an X-Y data plot. The 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. A time series for a single point is also supported.
Animation,
Lat-Lon Maps:
This plot type provides a Lat-Lon Map animation of the requested data product, in single time step increments, for any specified time interval.
Time-Lon Hovmoller,
Lat-averaged:
This plot type provides Hovmoller Longitude vs. Time color plot. For a specified area, the average value of the data product is displayed with longitude as the X-axis and time as the Y-axis.
Time-Lat Hovmoller,
Lon-averaged:
This plot type provides a Hovmoller latitude vs. Time color plot. For a specified area, the average value of the data product is displayed with latitude as the X-axis and time as the Y-axis.
Scatter Plot,
Time averaged:
This plot type provides a scatter plot of all time-averaged (or single time) values of the two parameters for a selected area. This function allows for the examination of the relationship between two parameters geographically.
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Color Options for Lat/Lon Map and Hovmoller Plots

Option Description
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.
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Y-Axis Options for Time Series

Option Description
Dynamic: Dynamically sets the minimum, maximum, and interval values for the Time Series Y-axis.
Customized: Allows user to specify the minimum, maximum, and interval values for the Time Series Y-axis.
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Resolution Options for Lat/Lon and Hovmoller ASCII Outputs

This pull-down menu provides resolution options for Lat/Lon Map and Hovmoller ASCII outputs. Please note that the finest resolution option in the pull-down menu is equal to the data resolution and others are lower. For a given resolution selection, the program steps through each of the possible lat/lon, lon/time or lat/time points, and sets each point value to be the same as that of the nearest original resolution point. No interpolation or averaging is preformed. If you have suggestions for adding new resolutions, please contact us at help@daac.gsfc.nasa.gov
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Unit Options on Resultant Image Page

Option Description
mm: If this option is selected, the color scale will based mm/hr for rain rate for mm for accmuclated rainfall.
inch: If this option is selected, the color scale will based inch/hr for rain rate for inch for accmuclated rainfall.
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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.
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Web Curator: Stephen W Berrick
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