Easy Graphs with Google Chart Tools | Envato Tuts+That's the Google Charts API. Request are sent as GET or POST URLs, and the Google charts server returns a PNG image in response. The type of chart, data and options are all specified within the querystring of the URL. The API defines how to do that. Let's review the different options. http://chart.apis.google.com/chart? This is the base URL; we'll use it for all image chart requests. The rest are
