Geography Reference
In-Depth Information
Table 2 Summary of colour blindness evaluations
Sub-item
Evaluation
Item
MAP
1
2
3
4
5
6
7
8 9012345678
✗✗✗✗✗✗✗✗✗✗✗✗✗✗✗✗✗✗
Colour
Colour-blind alternative-
greyscale version
Different hue saturation ~~
✗✗✗✗✗✗✗✗
~
✗✗
~
✗✗✗✗✗
Colour-blind alternative-
generate alternative colour
scheme for colour-blind users
✗✗✗✗✗✗✗✗✗✗✗✗✗✗✗✗✗✗
Unambiguous colour
combinations
~~~~
✗✗
~
✗✗
~~
✗
~
✗✗✗✗
~
Direct feature annotation
✗✗
n/a
✗✗
n/a
n/a
✓✗✗✗✗
n/a
n/a
n/a
n/a
n/a
✗
Avoid use of spectral
schemes to represent sequen-
tial data
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
Symbols
Shape variation to enhance
discriminability by colour-
blind
✓
n/a
~
✗✗✓✓
~~
✗
n/a
n/a
n/a
n/a
✗✗
n/a
✗
Lines
Varying line width to
enhance discriminability by
colour-blind
~
✓
~~~
✗
~~~
✗
~~~
✗
~~~
✗
Line annotations to enhance
discriminability by colour-
blind
✗
n/a
✗✗✗✗✓
~~~
✗
n/a
n/a
✗
n/a
✗✗✗
✓
Acceptable
~ Needs review
✗
Unacceptable
