prize7-1, Exercise 3: Stick charts and an Ordnance Survey sheet

Model answer (check the details):

Both are maps because each records spatial knowledge in a form that other people can use.

What they have in common:
1. Purpose: each was made for a particular use, ocean navigation or land navigation and planning.
2. Selection: each shows some things and leaves out others. The stick chart shows swell patterns and island positions, and the sheet shows roads, contours and buildings.
3. Symbols: each uses a code (sticks and shells, or conventional signs) that must be learned.
4. Scale and viewpoint: each simplifies and fixes a viewpoint, even if the stick chart is a pattern of relationships and not a measured scale.

Difference worth noting: the stick chart was a teaching device whose maker taught the user, while the printed sheet carries a key that explains itself.

Conclusion: a map is defined by what it does, not by its material.