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Opened 3 years ago

Last modified 3 years ago

#20030 new enhancement

Add support for HDPI imagery

Reported by: *Martin* Owned by: team
Priority: normal Milestone:
Component: Core imagery Version:
Keywords: HiDPI Cc:

Description

Some raster maps support higher resolution which is suitable for HDPI displays. For example Freemap Outdoor (covers middle Europe):

"tms[6,19]:​https://outdoor.tiles.freemap.sk/{zoom}/{x}/{y}@2x" (supports also @3x)

To make such imagery to display correctly (on HDPI displays) one must set "Tiles zoom offset" to -1. Unfortunately this setting is global and affects all imageries. It makes aerial imageries blurry.

It would be great to support "Tiles zoom offset" per imagery. It could be encoded in TMS URL for example as {zoom++1} ({zoom+1} is already taken for different purpose).

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Change History (3)

comment:1 by *Martin*, 3 years ago

Actually it would be nice if JOSM would detect HDPI (retina) displays automatically and would support {r} and {@2x} TMS arguments. Editor iD supports it: ​https://github.com/openstreetmap/iD/issues/7712

Please see also ​https://github.com/osmlab/editor-layer-index/issues/982

comment:2 by *Martin*, 3 years ago

#18848 is related

comment:3 by simon04, 3 years ago

Keywords: HiDPI added; HDPI removed

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