This is my first “revizit”. Now, what does that mean? Revizit simply means revisiting a viz or a visualization. By that, I mean, considering a data visualization or a data set from a different perspective to communicate the information more clearly and efficiently. This blog “Revizited.com” is all about that. That’s the reason why I chose the caption “Revisiting the way data is visualized”.

My first Revizit

The data I chose for my first revisit looks at the availability of computers and playgrounds in Indian schools. The data set is very simple. It shows state wise percentage of schools having computer and playground facility in India. Usually, this data is visualized using a simple map with a color palette representing the percentage values. I decided to use a hex tile map.

What is a Hex Tile Map and Why this chart?

If you are from tableau community, you would definitely have come across a hex tile map representing data about different states in the US. Hex tile map was first introduced by Tableau Zen Master, Matt Chambers. Click here to read his blog article. Hex Tile Maps are created by arranging hexagons closely in the form of grids where each hexagon represents a qualitative value (in this case it is States).

I chose hex tile maps because:

  1. All the states will be of equal size. This avoids smaller states and islands getting ignored.
  2. Easy to differentiate or compare all the states and focus on the ones which need attention.
  3. Territories which are at multiple locations can be clubbed and shown as one.

Below is an example of hex tile map for the US.

US hex tile map

Hex tile map by Matt Chambers

Hex Tile Map for the India

The data set for my visualization was based Indian states. While the hex maps were created for the US, it was not available for India (correct me if I’m wrong). Hence I decided to create a hex tile map template for India. I wrote a separate article on how I created hex tile map for Indian states. Click here to read it. Below is a screenshot of the final template compared to normal India map.

India hex tile map

Normal Map vs Hex Tile Map

The final visualization – Computers and Playgrounds in Indian schools

Both learning and playing are equally important for growing kids. The final data visualization which shows the state wise percentage of schools having computers and playgrounds is embedded below. You can view the visualization directly on Tableau Public by clicking here.

There are two hex maps, one for the computers and another for the playgrounds. Each equal sized hexagon represents an Indian state (at least now the states like Manipur and Mizoram doesn’t have to look small in front of the big ones). The color indicates the percentage value of that state. There are color legends for each of the maps to understand what it means. Hover on the map to view more details. If there is a way to make this map even better I’m happy to know. Please leave your comments below.

Hope the information in this article was interesting and you will visit again for more. Thanks for reading!

Update: This visualization was selected as Viz of the Day by Tableau Public on 3rd November 2017.

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Last modified: November 14, 2017

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