Why do maps have legends?

Short answer

A legend explains colors and symbols so readers can interpret the map consistently.

How it works

Legends vary between maps. Readers should also check scale, orientation, and notes rather than relying on symbols alone.

Key point

The practical point is this: Readers should also check scale, orientation, and notes rather than relying on symbols alone.

References

• Geospatial Information Authority of Japan: Maps and geospatial information
• Geospatial Information Authority of Japan: Map symbols