A simple data visualization that maps (pun intended) Postal Index Number (PIN) Codes of India to Hex Triplet colours, resulting in a colourful geographic representation of the Indian Postal Code System.

This project converts each 6-digit PIN Code into a hexadecimal colour code and displays the corresponding postal areas on an interactive map. Each geographical region of a PIN is filled with the corresponding hexadecimal colour, creating a vibrant mosaic representing Indian postal geography.

Each 6-digit PIN (for example, 560001) becomes a hexadecimal colour code (#560001). For more, read my LinkedIn, Substack Post.

1. Download the required data file

   • From data.gov.in, download the data.
   • Place the file as data.geojson in the same directory as index.html.

2. Start a local web server

   Using Python3 (recommended):

   python -m http.server 8000

   Using Python 2

   python -m SimpleHTTPServer 8000

   Using Node.js:

   npx http-server

   Using PHP:

   php -S localhost:8000

3. Open in browser

   • Navigate to http://localhost:8000
   • Wait for the map to load (may take time depending on data size)

• leaflet.js. It is the interactive mapping library.
• OpenStreetMap for base map tiles.
• No additional build tools or frameworks are required

• Created by Hiran Venugopalan using Claude AI
• Thanks to OSM Kerala Team
• Data Source is on Government of India Open Data Platform