High-resolution tiles

From OpenStreetMap Wiki
(Redirected from Retina tiles)
Jump to: navigation, search
Available languages — High-resolution tiles
Afrikaans Alemannisch aragonés asturianu azərbaycanca Bahasa Indonesia Bahasa Melayu Bân-lâm-gú Basa Jawa Baso Minangkabau bosanski brezhoneg català čeština dansk Deutsch eesti English español Esperanto estremeñu euskara français Frysk Gaeilge Gàidhlig galego Hausa hrvatski Igbo interlingua Interlingue isiXhosa isiZulu íslenska italiano Kiswahili Kreyòl ayisyen kréyòl gwadloupéyen Kurdî latviešu Lëtzebuergesch lietuvių magyar Malagasy Malti Nederlands Nedersaksies norsk bokmål norsk nynorsk occitan Oromoo oʻzbekcha/ўзбекча Plattdüütsch polski português português do Brasil română shqip slovenčina slovenščina Soomaaliga suomi svenska Tiếng Việt Türkçe Vahcuengh vèneto Wolof Yorùbá Zazaki српски / srpski беларуская български қазақша македонски монгол русский тоҷикӣ українська Ελληνικά Հայերեն ქართული नेपाली मराठी हिन्दी অসমীয়া বাংলা ਪੰਜਾਬੀ ગુજરાતી ଓଡ଼ିଆ தமிழ் తెలుగు ಕನ್ನಡ മലയാളം සිංහල ไทย မြန်မာဘာသာ ລາວ ភាសាខ្មែរ ⵜⴰⵎⴰⵣⵉⵖⵜ አማርኛ 한국어 日本語 中文(简体)‎ 吴语 粵語 中文(繁體)‎ ייִדיש עברית اردو العربية پښتو سنڌي فارسی ދިވެހިބަސް

High-resolution tiles (often also called "retina" tiles) are tiles with a higher resolution than usual. This is a configuration feature of Mapnik.

On screens high-resolution tiles have the effect of making everything in the image look exactly the same but bigger (it might feel like you're seeing less detail). When printing, this means you get more dots per inch, sharper print quality, but without scaling down things like text labels to become too small.

The scaled-up features of high-resolution tiles (text in bigger fonts, larger icons) will help with visual impairment.

An area of Frankfurt shown in hi-res (left) compared with the standard map (right)

The same coverage area with the same number of pixels, but on the right we see a standard zoom level 16 rendering, on the left we use these pixels to display fewer features, equivalent to what would normally be rendered smaller at zoom level 15. With more pixels these features appear sharper, more defined, and bigger

Larger animated comparison

Slippy maps may be configured to show such tiles in a scaled down size by default and the user's browser can enlarge them again if it is set to enlarged web pages (including images). Or maybe the slippy map software could read the user's dpi setting and scale accordingly (just an idea …). This may be useful on high-resolution displays to achieve resolution independence for slippy maps.


See also