U1.09
Discriminable level limits of a single channel
Cards in this group · 5
- U1.09.1Every visual channel supports a limited number of reliably discriminable levels
- U1.09.2Beyond the limit, added levels bring confusion, not information
- U1.09.3The categorical-colour limit is lower than the category count most charts actually use
- U1.09.4Discriminable-level limits drop as marks shrink
- U1.09.5Over the limit, aggregate categories instead of subdividing the encoding