The Chart API provides a simple way to create image charts of various kinds by sending a formatted URL that includes both the data and chart CONFIGURATION OPTIONS to a Google server. The Chart API includes a closed set of charts with various options. The Chart API datasets are limited to the size of a URL (roughly 2K).

The Visualization API provides a way to connect charts and data sources over the WEB and to publish them:

• The Visualization API provides a Javascript API to access charts.
• Its gallery of charts includes Google-created charts, but is also open to any THIRD party to create their own Visualization API-compliant visualizations.
• Visualization API charts and charts can be anything that can be rendered by a BROWSER. This includes images, Javascript, vector-graphics, Flash, etc.
• A considerable number of Chart API charts are accessible through the Visualization API, although some of their configuration options may not be available.
• The API also provides a documented wire protocol and a way for anyone to expose their data sources to any of the APIs visualizations.
• The API has a defined event model that allows charts to throw and receive events and thus communicate with their host page and/or other charts on the page.

The Chart API provides a simple way to create image charts of various kinds by sending a formatted URL that includes both the data and chart configuration options to a Google server. The Chart API includes a closed set of charts with various options. The Chart API datasets are limited to the size of a URL (roughly 2K).

The Visualization API provides a way to connect charts and data sources over the web and to publish them: