I am preparing a map over migration routes to/from the Arctic - primarily birds and cetaceans. And I would love to get some advice on how to properly present those corridors/routes.
Let's focus on the birds, for now. Other maps usually present these as wide shaded areas, they overlap as well, without arrows. In my map I wanted to simplify things a little, and to not be so exact. It gets messy too with the overlapping corridors, which I wanted to avoid. Since the focus of the work is Arctic (and migration to/from) I chose the Fuller/Dymaxion projection, which presents the whole World interrupted, but the Arctic is in the middle. I also wanted to not make the Arctic too small, so I thought I would cut off parts of the Southern hemisphere.
Here is where I am at right now:
Which is quite ok - but I have some symbolization problems...
- How do I show that the arrows toward South America and Australia continue outside the map boundary (there are birds that migrate all the way to Antarctica)
- How do I present it so that it doesn't look like the arrows are from a) to - it is a corridor/flyway with some birds stopping on the way.