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Change picture for defensive towers

Müncheberg Küstriner Torturm.JPG
The current picture shows a watchtower of the border between Germany and Germany. These towers didn't serve true defensive purposes (only in the Eastern german official view the wall was a "protective wall against the (American) imperialism", whilst most people see it as a fence to prevent the own citizens from escaping). There are less ambiguous examples like this: --Dieterdreist (talk) 09:15, 2 December 2016 (UTC)
I understand your intentions, however both the German border tower from Marienborn and your Müncheberg example are historic, they don't serve defensive or protective purposes currently. Maybe we can find a truly defensive one that is in use. --Polarbear w (talk) 10:52, 2 December 2016 (UTC)

The tower type is not about the current function but about the typology of the tower. There are hardly any defensive towers today anyway, at most radar towers might qualify, but that's really not how tower:type is applied typically. --Dieterdreist (talk) 09:00, 3 December 2016 (UTC)

Well then it probably depends how wide or narrow you define the process of defending. Your radar example is defending by electronic monitoring. The Marienborn tower was for defending the border by visual monitoring against trespassing (from whichever direction). The Müncheberg tower shows support for defending by shooting arrows trough embrasures. --Polarbear w (talk) 12:35, 3 December 2016 (UTC)

indeed, I agree the radar tower would be a border case as well, and I'd rather suggest a new value if needed. The Müncheberg Turm is probably better classified as watchtower. --Dieterdreist (talk) 12:54, 3 December 2016 (UTC)

probably "defensive" wasn't the best choice for the value, anyway it has 1800 uses now. Watchtower (144) would have been a better fit, for country borders, medieval city-walls and prisons alike. --Polarbear w (talk) 13:25, 3 December 2016 (UTC)

Both are valid types, for prisons and borders, watchtower is fine, for medieval city walls and castles, defensive is fine. --Dieterdreist (talk) 10:46, 4 December 2016 (UTC)

Good, so you propose more distinctive tagging. Remains the question what ground truth is behind the existing 1800 'defensive' tags? --Polarbear w (talk) 23:02, 4 December 2016 (UTC)

Sorry, I didn't necessarily mean to invent a new tag, I as thinking about the "observation" type when I actually wrote "watchtower" (but a new "watchtower" tag would not be bad anyway). As for the question about objects with the tag tower:type=defensive: I would expect them all to describe defensive towers. In cases they do not, the tower:type subtag should obviously be changed. There is nothing special with this tag, it is always like this with all OSM tags. --Dieterdreist (talk) 10:36, 5 December 2016 (UTC)