Given a degraded image of a Google maps tile, for example:
Is there a service or technique I can use to find the map coordinates of this tile?
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(EDIT : I ended up to the same conclusion as in the comments, some of them I hadn't seen before answering. At least there's an answer, even if it doesn't solve your real problem)
You can use Google Image service : By uploading the image to google (the little camera), I found this link (second match) where you can see a similar image : https://twitter.com/MissGrumpyGamer/status/892452360605360129
The post also mention Terra Pattern, but I highly doubt it could work on your degraded map tile.
However, it implies somebody has posted on internet a similar image and that Google looked at it...