Using GPS data from OpenStreetMap, these pendants are chemically etched and feature over 120 major cities from 32 different countries.

From Chicago to Tokyo, these tags are intended as unisex jewelry for urbanites who just love their city and want to pay homage to it.

Urban Gridded Dogtags is now raising money on Kickstarter, and for $50 – $100, you can wear a piece of your city’s map.

Clever use of GPS. I’m just waiting for them to do my home, though I suspect it may be a while before they do a GPS map of the sewer system.

Urban Gridded Dogtag Jewelry Collection by AMINIMAL Studio via Taxi.