Database Reference
In-Depth Information
F I g u R e 2 -17
Geo-spatial example
FI gu R e 2-18
Divergent values
The solution in these cases is to choose intervals carefully and, knowing your
data, apply a wider range to the first color. Figure 2-19 shows this approach
with the same data. The variances are much clearer, and color has been used
to rank the countries.
You can think of indicators as a subset of the display of colors along an axis,
with predetermined shapes in a predetermined grid rather than colors on a
map. The convention of red is bad; yellow is a warning; and green is good.
Just red and green is very typical and should only be diverged from with
much thought. One example of a divergence may be to show red for values
less than last year, and black for values greater, which is a system that more
closely matches accounting conventions. Figure 2-20 shows an example of a
scorecard using red/yellow/green for figures against targets and red and black
for values against the previous year.
