[openstreetmap/openstreetmap-website] Facebook share image (#739)

Paul Norman notifications at github.com
Thu Dec 15 01:08:42 UTC 2016

> However, we could designate a particular well mapped area as the preview image, e.g. Berlin, or the full extent

I see three options for this issue. 

1. generate some static image for the `og:image` tag on pages where the map is being browsed;
2. take a tile from the center of the viewport at zoom-3, which isn't quite the same as what the user is seeing; or
3. decide that "it needs a new function to generate thumbnail on-fly, containing small version of current view of the map and then place it in html's og:image", which requires mainly work outside the scope of the rails port, and close this issue

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