Show Charts in the timeline background (from file, statistics or Wikidata)
The chart would be plotted on the 'timeline canvas', so it appeared as a background behind the events.
This would be amazing for seeing data related to the timeline you are viewing - For example, a chart of the population of a country against a timeline of it's military history.
For data sources:
Option 1: FILES - The user could upload a .csv file for example.
Option 2: STATISTICS - Have a search system which shows results from a selection of publicly available statistics (which we could hopefully add to continuously).
Option 3: WIKIDATA - Choose a property from Wikidata, then plot a chart calculated using the Wikidata values for each of the events on the timeline.
For example, you could choose the property "Attendance", and the system could then automatically plot an Attendance chart in the background of an "FA Cup Finals" or "Cannes Film Festival" timeline!
Please comment if you have a favourite among these options, as we'll have to bring them in one by one.
Of course, any other ideas for data sources to add to this list would be great to hear too! :)