@Lumannnn, thanks for starting the conversation! This functionality was definitely on my radar, and definitely useful. I'll have a look soon as what you wrote, and might refactor your patch if I decide to pull it in.

@mikefowler thanks for the fast response. Refactor as you want :)
Also, I'm not sure if it is the best solution to let a user specify groups. It is rather quick and dirty and I haven't put to much thoughts into it. Maybe there is a better way.

Hey @Lumannnn, what if you could pass additional options with each marker. Not groups, per se, but with this method there might be less setup. Does this achieve the same result, in your opinion?

$('.map').smallworld({
  center: [45, -50],
  markers: [
    {
      at: [37, -122],
      markerColor: 'red'
    },
    {
      at: [42, -100],
      markerColor: '#b4da44',
      markerSize: 4
    }
  ]
});

Hey @mikefowler :) Thanks for the follow up.
If I understand you correctly, it'll allow you to only specify one "point" for each marker, is that correct?
Imho, that would only be less setup if you wanted to have few markers (or many markers with different properties).
I haven't played too much with that around, but I think my solution would fit my use case better.
I'd like to have, say, 100 markers in blue, and 25 markers in red, 50 in orange, and so on (maybe even opacity would make sense to indicate a different "density"?).

How would I specify that with your solution?

Ah, OK. I see your point, @Lumannnn. I like that strategy.