The objectives are simple: They're adding a train station and the goal is to display how far you could get within 30 minutes before and after the new station is built. In this map that I'm working on here the circle size is calculated like this(all attributes with cost above 30 is removed, if there's time life when you get to a station we assume walking at 6 km/h for the remaining time and a limit at 20 minutes to prevent the circles from getting to big at origin.
Without the zoom layer the last circle is impossible to see since the size is really small. Any other good suggestions on how to illustrate this?
case when "cost" < 10 then 20*100*2 else (30-"cost")*100*2 END
Green = Nothing's changed
Yellow = Discontinued public transport zone.
Blue = New public transport zone.
How would you solve this with only one map? Other solutions then mine wanted!