Choropleth maps of Bangalore BBMP Wards

"The choropleth map provides an easy way to visualize how a measurement varies across a geographic area or it shows the level of variability within a region." - Wikipedia

Its an easy, colorful, effective and simple data visualization. At Janaagraha we use them visualize ward level data of Bangalore. A week back I thought it would be useful for others too and hence wrote a small script that could be used by anybody to create choropleth maps for Bangalore.

I wrote the initial script and then Anand helped me by adding more features. Its no where near completion. You can help us to resolve issues or by suggesting features.

Check some choropleth images created using the script.

BBMP Bangalore Election Results 2010 - Party wise breakup
Legends: Saffron for BJP, green for INC, yellow JDS, white for independents, purple for others.
BBMP Bangalore Election Results 2010 - Party wise breakup

BBMP Bangalore 2010 Elections - Gender ratio
Legends: Blue for male candidates, light pink for female candidates, dark pink for female candidates (reserved).
BBMP Bangalore 2010 Elections - Male/Female/Female(Res)

8 Responses

  1. Veera says:

    Suppose if I want to use the same script on a different map, say Chennai, do I have to create the SVG format of Chennai map naming the areas accordingly and then populate the values read from CSV file?

    that was my understanding by going through this code:

    correct me if I’m, wrong!

  2. Sonali says:


    I would like to get a blank ward-wise map and then fill in data according to my interest – which is about children in Govt. schools. How do I begin?


    • Thejesh GN says:

      I didnt understand your question. Do you want labels on each ward? that can be done.
      Let me know if you need that. I can update the code.

  3. soosai says:

    I am looking for 198BBMP ward maps.
    Please help me find

  4. Manoj Vivek says:

    Where did you get these data from? Your source has data allover India or just Bangalore?

  5. ATHIRA RAJEEV says:

    How can I get the ward map of ward number 152 alone?