support=wall_mounted => mounted on wall usually with horizontal bar, at 90 degree angle with road, so clock face is visible along the road. (shops, train stations); could optionally be snapped to building (part) wall.
support=wall => mounted directly on wall, so clock face is visible across the road. (clock tower, shopping mall, train stations); should be snapped to building (part) wall if possible.
This distinction is also useful for surveillance cameras, though there it can usually be derived from the camera type.
(unlike -public- street lighting where wall mount is way more common than lamp inside wall)
Suggestion: Allow users to specify whether clock is located on wall or on a horizontal mount extending from the wall.
Key:supportsupport=wall_mounted=> mounted on wall usually with horizontal bar, at 90 degree angle with road, so clock face is visible along the road. (shops, train stations); could optionally be snapped to building (part) wall.support=wall=> mounted directly on wall, so clock face is visible across the road. (clock tower, shopping mall, train stations); should be snapped to building (part) wall if possible.This distinction is also useful for surveillance cameras, though there it can usually be derived from the camera type. (unlike -public- street lighting where wall mount is way more common than lamp inside wall)