As promised, I’m sharing a new Oracle Analytics custom visualization for community feedback: Voronoi Chart
My goal is to broaden custom visualization sharing and, if the community finds this useful, help it move toward consideration for an official release.
I think of this as an “ultimate pie chart” concept: it shows each item’s share of the whole while also making hierarchy visible, eliminating the need for showing multiple pie charts as rows or columns in a report
What this visualization does
- Represents contribution to total using Voronoi cell area
- Preserves context with hierarchy:
- Color Group for high-level grouping
- Region Group for sub-grouping
- Category boundaries for item-level structure
- Supports interactive legend highlighting and search
- Includes dark mode + high contrast label options
- Responsive legend placement for different canvas sizes
Why I built it
Traditional pie charts are simple, but they struggle with dense categories and multi-level grouping.
This Voronoi approach keeps the “part-to-whole” story while adding hierarchical structure and richer interaction.
Download and install
- Download the extension ZIP below
- Download Sample DVA below
- In Oracle Analytics, go to Console -> Extensions and upload the ZIP
- Open a workbook and add Voronoi Chart by Vaughn Sousa
Suggested shelf mapping
- Category -> entity/item name
- Value -> numeric contribution
- Color Group -> top-level group
- Region Group -> subgroup
- Tooltip Detail -> supporting attributes
Feedback I’m looking for
- Is the hierarchy visually clear at dashboard scale?
- Does this work better than pie/treemap for your use cases?
- What would you need for production readiness?
- Is it performant?
- Did I hardcode something that makes this harder to use?
If you find this useful, please upvote/comment so we can prioritize improvements and evaluate a path toward broader adoption.
