River basins of India in rainbow colours by reddit user Fejetlenfej
UPDATE: High resolution digital prints for canvases or posters now available on Etsy!
In Fejetlenfej’s own words:
Thanks for checking it out!
High resolution map of all the permanent and temporary streams and rivers of India in beautiful rainbow colours, divided into catchment areas. It shows Strahler Stream Order Classification. The higher the stream order, the thicker the line.
Map made mostly with the open-source QGIS software.