id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
17496	Inferred values for autofilters	derickson.e@…	team	"I believe autofilters would be more useful if some tags were inferred when not actually present. For objects missing a layer=* tag, I propose the following scheme:

- bridge=*, power=1, location=overhead: assume layer=1 if not specified
- tunnel=yes, tunnel=culvert, location=underground: assume layer=-1 
- tunnel=building_passage: assume layer=0
- Other highway=*, waterway=*, railway=*: assume layer=0 

A user who had autofilters enabled for the layer tag could then use autofilters as if those tags were present. For example, it is not recommended to tag layer=0, but such a filter would be useful when working on a complex motorway interchange, filtering out all objects not assumed to be at surface level. The autofilter buttons would still only appear when an object with a layer=* tag is in the viewport, as is currently, but whenever an autofilter button appears, there would also be a ""0"" button between the ""1"" and ""-1"" buttons.
"	enhancement	new	normal		Core