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You'd need a fairly large ad to be visible in satellite imagery. I suspect this service or anything like it would be a better bet in the higher-resolution area

You'd need a fairly large ad to be visible in satellite imagery. I suspect this service or anything like it would be a better bet in the higher-resolution areas where Google uses aerial imagery.

shabble 15y ago
It's hard to find any concrete details on the resolutions used by GE, and it varies massively by area. I recall their recent investment in one of the (GeoEye?) satellites had a theoretical resolution of 40cm, but is restricted by US regulations to provide a maximum (edit: minimum) pixel size of either 50 or 60cm. Assuming 1m x 1m pixels, a standard[1] QR code could be fitted inside a 25x25m square. You'd probably want to increase pixel size, and maybe use a smaller version (along with a url shortener, if necessary) to increase the chances of a successful decode. Aircraft orthoimaging can work at much higher resolutions. An article from 2005[2] shows pictures capable of distinguishing individual faces. I can only assume things have since improved. [1] of which there are many: https://secure.wikimedia.org/wikipedia/en/wiki/QR_code https://secure.wikimedia.org/wikipedia/en/wiki/QR_code [2] http://www.gearthblog.com/blog/archives/2005/09/ultimate_google.html http://www.gearthblog.com/blog/archives/2005/09/ultimate_goo...