Detect "ruins=round_tower" as a ruined round tower.

changelog.md

@@ -18,6 +18,7 @@ Detect "ruins=village" as a ruined village.
 Show "historic=village_pump" as a historic, hand-operated water pump.
 Detect "ruins=grave_yard" as a ruined graveyard.
 Detect "man_made=sound mirror" as a nonspecific historical item.
+Detect "ruins=round_tower" as a ruined round tower.
 
 ## 28/12/2023
 Show hilltop enclosures as hill forts.

style.lua

@@ -1678,17 +1678,21 @@ function filter_tags_generic(keyvalues, nokeys)
 
 -- ----------------------------------------------------------------------------
 -- Render ruined mills and mines etc. that are not something else as historic.
--- ----------------------------------------------------------------------------
-   if (( keyvalues["historic"]  == "ruins"      ) and
-       (( keyvalues["ruins"]    == "lime_kiln" )  or
-        ( keyvalues["ruins"]    == "manor"     )  or
-        ( keyvalues["ruins"]    == "mill"      )  or
-        ( keyvalues["ruins"]    == "mine"      )  or
-        ( keyvalues["ruins"]    == "village"   )  or
-        ( keyvalues["ruins"]    == "watermill" )  or
-        ( keyvalues["ruins"]    == "well"      ))) then
+-- Items in this list are assumed to be not operational, so the "man_made" 
+-- tag is cleared.
+-- ----------------------------------------------------------------------------
+   if (( keyvalues["historic"]  == "ruins"        ) and
+       (( keyvalues["ruins"]    == "lime_kiln"   )  or
+        ( keyvalues["ruins"]    == "manor"       )  or
+        ( keyvalues["ruins"]    == "mill"        )  or
+        ( keyvalues["ruins"]    == "mine"        )  or
+        ( keyvalues["ruins"]    == "round_tower" )  or
+        ( keyvalues["ruins"]    == "village"     )  or
+        ( keyvalues["ruins"]    == "watermill"   )  or
+        ( keyvalues["ruins"]    == "well"        ))) then
       keyvalues["historic"] = keyvalues["ruins"]
       keyvalues["ruins"] = "yes"
+      keyvalues["man_made"] = nil
    end
 
 -- ----------------------------------------------------------------------------

taginfo.json

@@ -2349,6 +2349,7 @@
     { "key": "ruins", "value": "monastery", "description": "Detect historic monasteries" },
     { "key": "ruins", "value": "place_of_worship", "description": "Detect ruined churches" },
     { "key": "ruins", "value": "priory", "description": "Detect historic monasteries" },
+    { "key": "ruins", "value": "round_tower", "description": "Detect ruined round towers" },
     { "key": "ruins", "value": "tower", "description": "Detect ruined towers" },
     { "key": "ruins", "value": "village", "description": "Detect ruined villages" },
     { "key": "ruins", "value": "watermill", "description": "Detect ruined watermills" },