I removed it so that this missing image issue will be revealed to people caring about data items. And there is bot copying data from OSM Wiki to Data Items anyway, right?
This should not be happening anymore as I am now aware about this one more way how data items are not working, and listing of files used by data items was setup as workaround for that problem (as noone has any idea how to actually fix it). So in future I will replace also files in data items (ugh) and moderators will be able to notice usage in data items before deleting them.
BTW, help with migrating/fixing/removing broken image links (listed at Category:Pages with broken file links - OpenStreetMap Wiki ) also would be welcome. Wiki:Files used by data items/ pages can be ignored until bot will regenerate them.
There is additional complexity: what kinds of images should we allow?
Is it ok to have images on “fair use”? Problem here is that requirements may depend on location and may be more strict in UK.
Do we want to allow “noncommercial use only” images? Who exactly can use them? Ideally they would be replaced by images on more permissive license (can I use them to develop OSM editor partially funded by an external grant?)
Can we keep unused screenshots as “educational use”?
You need to draw a new one, or use one of many existing ones. These ones were used solely on ancient page listing progress of mapping of some location, so I just removed overly elaborate progress table that was not maintained for years.
gap between walls: File:Entrance.png - OpenStreetMap Wiki (surprisingly hard to find one that would not be a stile/gate) and would be without noise of other objects
In all cases - you can also take photo and upload it to Wikimedia Commons! (they have a better upload process than OSM Wiki, mostly because their community is much much bigger and centers around file uploads)
To give an example, a lot of academic research is grant-funded. That doesn’t make it a commercial activity.
Personally don’t see why NC images shouldn’t be fine on the wiki. If someone wants to print the Wiki and sell it for a profit, or sell an editor for profit, or put ads in the editor, then it’s up to them to find out if they can use a given image or to find a new one.
The issue is that the wiki as a whole is licensed under the Creative Commons Attribution-ShareAlike license, which permits commercial reuse. Any image under a less permissive license, whether Creative Commons NonCommercial or NonDerivative, is effectively included under fair use just like an all-rights-reserved image.
Incidentally, the CC NC definition is intentionally vague and the subject of some controversy between authors and adaptors.