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A multi-level pie chart is a pie (or donut) chart in which each piece of pie is further split into smaller pieces. It is sometimes also called "sunburst partition":
Is there an open source JavaScript library that would allow me to display a multi-level pie chart?
Data would be sent by the server, for instance as JSON/JSONP.
Requirements:
If you want a highly customized, open-source Javascript chart library, then D3 is a clear choice. It has been making the lives of visual artists and data scientists a lot easier with a diverse range of possibilities, along with ease of use.
Your example chart looks like the Sunburst chart to me. And here is the chart re-created in D3
And your data is definitely safe, as you wouldn't be dealing/interacting with third parties.
Another library worth mentioning is the Highcharts.js; which is another wonderful visualizations open-source Javascript library.
Here is the fiddle for plotting a sunburst chart in Highcharts. And again, your data is completely safe and the library is open-source.
