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GIOVANNI PLOT TYPES

This page describes the common plot types available in Giovanni. Note that in addition to these common plot types, certain Giovanni interfaces may also provide other plot types not described here.

Single Parameter Plots

The following list contains the single parameter common plot types available in Giovanni. These plots are used for visualizing single parameters only:


Multi-Parameter Plots

The following list contains the multi-parameter common plots available in Giovanni. These plots are used for visualizing comparisons involving two or more parameters:



Plot Type
Description
Single/Multi Parameter
Lat-Lon Map, Time-averaged
The data values for each data grid are averaged over the user specified time range with interval weighted average, ave (see the full description of this function).
Single
Time Series, Area-averaged
It creates a time series of area averages calculated with areal weighted averaging, aave (see the full description of this function). For a single point, time series is for the nearest grid point and no averaging or interpolating is performed.
Single
Animation, Lat-Lon Maps
No data analysis is done to this option. All grid values in user selected area are displayed for each of the time step within the user selected time period. If all grids have missing data for a given time step, a message "Entire Grid Undefined" will show.
Single
Time-Lon Hovmoller, Lat-averaged
It creates a Time-Longitude cross-section by averaging user selected latitude range with ave (see the full description of this function), weighted by the difference between the sines of the latitude at the northern and southern edges of the grid box.
Single
Time-Lat Hovmoller, Lon-averaged
It creates a Time-Latitude cross-section by averaging user selected longitude range with ave (see the full description of this function).
Single
Vertical Profile, Parameter vs. Pressure/Altitude
It creates a Parameter vs. Pressure/Altitude vertical profile. Averaging over time, latitude or longitude is performed using ave (see the full description of this function) if a time period, latitude or longitude range is selected; an areal average is performed using aave(see the full description of this function) if an area is selected.
Single
Lon-Pressure Cross-section, Lat-averaged
It creates a Longitude-Pressure cross-section by averaging user selected latitude range with ave (see the full description of this function), weighted by the difference between the sines of the latitude at the northern and southern edges of the grid box.
Single
Lat-Pressure Cross-section, Lon-averaged
It creates a Latitude-Pressure cross-section by averaging user selected longitude range with ave (see the full description of this function).
Single
Overlay of Lat-Lon Map, Time-averaged
Overlay plot of Lat-Lon maps for two selected parameters, averaged over the user specified time range with interval weighted average, ave (see the full description of this function).
Multi (2 max)
Difference of Lat-Lon Maps, Time-averaged
Lat-Lon map of the difference between the two selected
parameters, averaged over the user specified
time range with interval weighted average, ave (see the full description of this function).
Multi (2 only)
Overlay of Time Series, Area-averaged
Overlay plot of time series averaged over selected area with areal weighted averaging, aave (see the full description of this function) for up to three selected parameters. For a single point, time series are for the nearest grid point and no averaging or interpolating is performed.
Multi (2 or 3)
Difference of Time Series, Area-averaged
Time series plot for the difference between two selected
parameters, averaged over user selected area with
areal weighted averaging, aave (see the full description of this function).
Multi (2 only)
Scatter Plot
Scatter plot for all non-missing values of two selectedparameters in user specified area and time range.
Multi (2 only)
Scatter Plot, Area-averaged
Scatter plot of two selectedparameters averaged over a user specified area with areal weighted averaging, aave
(see the full description of this function) in the user specified time range.
Multi (2 only)
Scatter Plot, Time-averaged
Scatter plot of two selected parameters averaged over a user specified time range with interval weighted average, ave (see the full description of this function) in the user specified area.
Multi (2 only)
Correlation Map of Time Series
Lat-lon map of temporal correlation coefficients (lag = 0, ranging from -1 to 1) between two selected time series.
Multi (2 only)
Correlation of Time Series, Area-averaged
Single value of temporal correlation coefficient (lag = 0, ranging from -1 to 1) between two selected time series, averaged over user specified area with areal weighted averaging, aave (see the full description of this function).
Multi (2 only)


2-D Display Options

Please note that the following display options apply only to the Lat-Lon Maps, Animations, Cross-sections, and Hovmoller (longitude-time, latitude-time) plots.

Option Description Sample Image
Grid Fill
Each grid cell in the image is filled with the color representing its data value. All data values are properly represented, but the image has a pixelated, or boxy appearance.
Shaded
Contour surfaces are shaded using bi-linear interpolation. The image looks smooth, however isolated data points are not shown.
Combination
This option overlays the contour shaded image on top of the grid filled image. This allows the image to appear smooth, while including isolated data values where coverage is sparse.


Example 1: Grid Fill

Example image using the Grid Fill option


Example 2: Shaded

Example image using the Shaded option


Example 3: Combination

Example image using the Combination option

Spatial Subsampling Options

Please note this option applies to ASCII output data only. Subsampling is done after any averaging has been performed, including averaging overtime for Lat-Lon Maps, longitudinal or latitudinal averaging for Hovmoller and Vertical Cross-section plots.

 

Option Description
Original
The ASCII output data are given in the original native resolution. This is the default.
Interval 2, 3, 4, or 5

The ASCII output data are subsampled along the spatial dimensions (latitude and/or longitude) with the user-specified subsampling interval of 2, 3, 4, or 5.

For example, subsampling with an interval of 3 will select every third grid cell across the spatial dimensions starting from the lower left corner of the user selected area.

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Last updated: Apr 06, 2016 04:17 PM ET
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