id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
12350	[patch] snap scale to native zoom levels	kolesar	team	"JOSM renders TMS tiles resized when scale does not match TMS zoom level. Resizing uses nearest neighbour algorithm, resulting image is noisy. There is an option to set zoom to layer's native resolution but it is a one-time action. After zooming to data/layer/selection scale is again set to a fractional value.

I have added a new option to keep scale snapped to Mercator zoom levels:

Edit / Preferences (F12) / Display Settings / Look and feel / [x] Snap zoom to Mercator zoom levels (imagery looks perfect, zoom steps are larger)

When this setting is enabled and projection is Mercator, zoom in and out keeps scale at powers of two. Adjusted MapSlider to have snapped levels at values 0, 5, 10, and so on. Requests to change zoom by a fraction are rounded. Zoom to bounding box works fine, no edges get outside of viewport.

In this mode maps look and zoom exactly the same as in usual web maps. Attached patch based on current snapshot."	enhancement	closed	normal	16.02	Core	latest	fixed		naoliv