[Thrymr]

I read bwooce's comment to mean one pixel per person literally (not in map projection). If you're not trying to represent geography at the same time you don't have that problem. You could still sort the data representing individuals by two variables if you want, e.g. latitude and longitude, and map them to x and y, but it wouldn't be a map.

[leephillips]

You're right, I should have read the comment more carefully. An interesting idea! So please take my comment as applying to the article rather than bwooce's comment.