The linked article mentions that they ingested 8 million panos - even if they're scraping the dynamic viewer that's $30k just in street view API fees (the static image API would probably be at least double that due to the low per-call resolution).

OCR I'd expect to be comparatively cheap, if you weren't in a hurry - a consumer GPU running PaddlePaddle server can do about 4 MP per second. If you spent a few grand on hardware that might work out to 3-6 months of processing, depending on the resolution per pano and size of your model.

Their write up (linked at top of page below main link, and in a comment) says:

> "media artist Yufeng Zhao fed millions of publicly-available panoramas from Google Street View into a computer program that transcribes text within the images (anyone can access these Street View images; you don’t even need a Google account!)."

Maybe they used multiple IPs / devices and didn't want to mention doing something technically naughty to get around Google's free limits, or maybe they somehow didn't hit a limit doing it as a single user? Either way, it doesn't sound like they had to pay if they only mention not needing an account.

(Or maybe they just thought people didn't need to know that they had to pay, and that readers would just want the free access to look up a few images, rather than a whole city's worth?)