Reshape all polygons to be the intersection of the polygon and our data domain

[brucecrevensten]

We keep encountering polygons that fail in the app because there's no data. Instead of fixing this on an ad-hoc basis, I suggest that we reshape every polygon in the app to be the intersection of the polygon and our data domain (we can intersect with the IEM domain even though we know that won't include permafrost everywhere).

Xref #91

[charparr]

That makes sense - so like this example using the native corporations? Black lines are the original and the colored polygons are the intersection with the "IEM with AK Aleutians" domain.