A hash accidentally got typed before a pincode while filling a form. On screen it rendered as a hex color. That observation took one Friday morning to turn into a map of India painted entirely in postal data.
Every Indian pincode is six digits. Every six-digit number is a valid hex color. The boundary data came from data.gov.in, found through the OpenStreetMap Kerala community. Claude handled the initial Leaflet build. Urban areas collapsed into white pixels at country scale, so the final render moved to QGIS. The output was 19,311 post offices, 19,311 colors. Warm tones across the south, cooler shades in the north. Nobody chose the palette. The postal system did.
The LinkedIn post reached 3 lakh people. Someone built the same map for Germany within days. A developer turned the logic into a date-based color calendar. The idea traveled in directions that were never planned.
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