Hi Dehaya,

If we were to make the legend Interactive and the world map dynamic, we can improve legibility. We should making all the values (1 GJ, 10GJ etc) in the legend as clickable buttons. On clicking say 10kJ the World Map should show Boloid Events of 10GJ magnitude and remove the rest. This will make it easier to answer my earlier question.

As far as I am concerned, the chart extension is build on vega, which does support interactive behavior: https://github.com/vega/vega/wiki/Signals However, such is hard(er) to define than the mapping to graphics, in particular if you want the kind of cross filtering style behavior you refer to.

Cheers, Jan