Bubble map
Cartographic bubble chart
This is a map where data points are shown as bubbles of different sizes, with the size of each bubble representing a numerical value and the location showing geography.
Scale bubbles to the values they represent, avoid extremes that make comparison difficult and limit the number to avoid clutter. Use a clear colour scheme and label each bubble with its location and value. Provide context with a title, legend and data source, and consider interactive features that allow users to explore the data. Don't use if your data is not geographically specific or if the size differences between bubbles are not significant. It's better for visual appeal than for detailed analysis because it's hard to accurately compare bubble sizes — especially for smaller values.
1. To show the distribution of renewable energy investment around the world, with bubble sizes representing the amount of investment.
2. To show where survey respondents come from, with bubble sizes representing the number in each location.
In which countries does your company generate the most revenue?
Multiple mention, Numerical response, Ranking question, Rating scale, Single mention