Being able to highlight and write little notes directly on the heatmap, and storing them as URL parameters (see #41) so that these annotations can be shared could make heatmap more useful for things like email discussions.
Obviously this it cannot be implemented until #41 is resolved.
Opening this as a reminder for later; there's a lot of other stuff that's higher priority now.
It's possible for users to annotate leaflet maps: Demo, [source](https://github.com/Leaflet/Leaflet.draw.
Being able to highlight and write little notes directly on the heatmap, and storing them as URL parameters (see #41) so that these annotations can be shared could make heatmap more useful for things like email discussions.
Obviously this it cannot be implemented until #41 is resolved.