Add the ability to brush the map, to select points within a region on the map. This may not work with the default d3 brush and you may have to create a custom interaction- creating a custom selection rect, or capturing mouse over interactions while also holding a control key, to handle brushing data points in the map.
Create a set of design sketches for your approach.
Describe how you realized this design in your implementation.
Add the ability to brush the map, to select points within a region on the map. This may not work with the default d3 brush and you may have to create a custom interaction- creating a custom selection rect, or capturing mouse over interactions while also holding a control key, to handle brushing data points in the map.