The Google Visualization API uses several related APIs.
The Google Visualization API uses
Google's AJAX APIs' infrastructure to load necessary javascript and visualizations.
Specifically, we employ the single method loaded by the Google AJAX APIs
<script> tag, google.load, which loads individual AJAX APIs.
See also: google.load
The Google Visualization API lets you wrap visualizations as gadgets for easy publishing, sharing and use within Gadget containers, such as iGoogle, Google Spreadsheets and many other non-Google containers.
Refer to the Gadgets documentation for more information.
Google Spreadsheets is the first Google Visualization data source to be made available. There are several specific aspects to working with Google Spreadsheets as a data source, such as caching and real time updates. Read more on the Visualization API Spreadsheets section and at the Google Spreadsheet developer documentation.