Applied to the maps in the article, this could end up introducing animation to the chart. If your local light rail arrives every 30 minutes, then your ETA to a

Applied to the maps in the article, this could end up introducing animation to the chart. If your local light rail arrives every 30 minutes, then your ETA to arrive at various different grocery stores is gradually changing, drawing nearer to the center, and climbs up a steep (half hour) cliff when you aren't close enough to the station to catch the train. You could even colour the destinations by level of urgency - blue for destinations where you can casually stroll to the station, or red for ones where you really need to leave right away to catch the train.