Giovanni Index

Giovanni Concepts, Skills, & Techniques

Introduction to Giovanni

Giovanni has multiple interfaces, called instances. Instances are divided into four broad categories based on the type of Earth science data they display:

Atmospheric Instances: aerosol optical thickness, clouds, water vapor, ozone, trace gas profiles, reflectivity data
Environmental Instances: air quality, precipitation, multi-satellite atmospheric & land parameter data
Ocean Instances: ocean color, NASA Ocean Biogeochemical Model (NOBM) assimilated products (chlorophyll and phytoplankton functional groups) data
Hydrology Instances: rainfall, aerosols, clouds, water vapor, historical analyses of the hydrological cycle, land surface state data

Selecting a dataset with Giovanni

Giovanni Interface - General
Select an Area of Interest
Select Visualization Type
Set Parameters

A parameter is one of the variables that define a specific instance of a map projection. The parameters tab in Giovanni allows users to select the data source and type of data to be displayed on the map. From within the Giovanni interface, users can access the details of the particular dataset selected by clicking on the title of the data set.
Set Temporal (Time) Boundaries

Temporal, or time, boundaries can be set within the Giovanni interface. To set a temporal boundary users select a starting and ending date.
Visualization Output

Visualization is the representation of data in a viewable (graphic) medium or format. It is used to organize spatial data and related information. 15 types of visualizations are available with Giovanni. The most common forms used are Lat-lon time averaged maps and Time series plots. More complex forms include: Animations, Comparison, and Hovmöller Plots.
Zooming and Panning