[lio45]

If the hardwoods in the Thunder Bay area are poplar/aspen and white birch, then that's "Boreal". If in addition to those you have trees like maples, and elms, and yellow birch, and Pennsylvania ash, then it's "Mixed".

Again, that's valid at that level of detail. I am sure we could easily find Ontario forest maps matching that Quebec example I posted last page. At that (different) level of detail, it's pretty much a certainty Thunder Bay isn't in the same vegetation zone as Kingston anymore.

I'm pretty sure TB is at the edge of both zones, and I'm perfectly open with zone boundaries in frontier areas being sometimes not perfectly correct (transition zones are a continuum anyway). That is NOT the same kind of huge-map-design-101-No-No as mixing up grossly incompatible levels of detail like arbitrarily splitting off a certain Mixed Forest into its own category while keeping very different types of Mixed Forest lumped together.