Why would a portolan map be inappropriate as a resource for a geography class?

Portolan maps will probably not be used in a geography class because of the following reasons.

It is was a map that was used to navigate through a small area of land, the map was used on a small scale.

Secondly the portolan maps did not include the fact that the earth is spherical.

Also portolan maps where characterized by lack of map projections.

The vagaries of wind, sea and imperfect records threw off the measurements, so that upon completing a journey with the map, you wouldn’t land exactly on your starting spot.

Explanation:

north east because it has more forest