Support Multiple Land Masses

[patrick-5546]

• Current method PR: Create Land Obstacle #240

The current method generates a land mass by iterating through each latitude in a given bounding box and finding the leftmost and rightmost coordinate that is shallower than the given depth. This creates one polygon.

What we want to do: given a bounding box, create disconnected polygons for each area that is shallower than the given depth (i.e. island).

[patrick-5546]

Put on hold for now.

In the words of the great Asvin:

One idea is to have raye go around hawaii and back to vancouver island, and in that case, i think we’d want to be able to have raye avoid all the islands of hawaii, but again i think its something we focus on down the road