Hide labels that do not fit into treemap partition than truncate them

[dej611]

Mosaic can be configured to show many categories at once, sometimes leading to short "slices" that cannot fit the entire label:

In these cases I think it makes sense to apply the same hiding logic used for XY labels.

[markov00]

What would be the benefit if I hide some labels? in XY the labels overlaps on other categories (that is something we are also going to replace with wrap/multi-line). Here I kindly suggest not to make labels protrude onto other groups to avoid misunderstanding.

The example charts can definitely be revisited as a horizontal bar chart that for sure improves the data readability.
Mosaic is not meant for such a high number of categories, probably 3/4 max 5 columns are the max to have a good understanding of the underlying data.

[dej611]

Horizontal bar require a vertical layout which is not always available.
I see a heatmap-like visualization to be something that overlaps this specific scenario, but in heatmap case the legend is showing already values-color coding mapping.

[gvnmagni]

One little concern that I have is that if we only rely on the legend we could potentially have multiple series with the same color since we are looping colors. I know that it is clearly not ideal to have label that are so little that are unreadable, but that should be a clue for the user that the chart might have some issues.

I am afraid that legend alone might be unclear (two identical greens for example)