Treemap of various number of diseases in different states of the US

I am a Swansea University Student and I’ve been asked to examine the project tycho data( The treemap i made is down below.

Tool: Tableau
Country: USA
Disease: Measles, Pertussis, Diphtheria, Hepatitis A ,Polio, Rubella, Smallpox, Mumps
Visual mappings:

  • Colour : Each colour determines different values of cases of diseases found in each state.
  • Group by : States -> Name of diseases
  • Size: Number of people affected
    Question: Is my treemap clear or is there any other way I can do to improve this so others are able to understand the data?


The Treemap looks nice. However, you could provide a color legend for helping us to understand how colors are distributed according to values of diseases cases in each state. Color legend also provides max and min values demonstrated on Treemap.

You could also choose sequential colors legend. That helps to identify how values increase or decrease from bright to dark colors on the Treemap.

All the best.