I Was Here – Draw on street view, others can find your drawings
Hey HN, I made a site where you can draw on street-level panoramas. Your drawings persist and other people can see them in real time. Strokes get projected onto the 3D panorama so they wrap around buildings and follow the geometry, not just a flat overlay. Uses WebGL2 for rendering, Mapillary for the street imagery. The idea is for it to become a global canvas, anyone can leave a mark anywhere and others stumble onto it.
In plain words
I Was Here is a web application that lets users draw on street-level panoramic imagery from locations worldwide. Drawings persist and are visible to other users in real time, with strokes mathematically projected onto the 3D geometry of buildings and surroundings rather than appearing as flat overlays. Built with WebGL2 and powered by Mapillary street imagery, it functions as a collaborative global canvas where anyone can leave marks that others discover while exploring street views.
written from the facts on this page · September 2026
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