[OSM-dev] "Retina" tiles - best way to support them?

Stefan de Konink stefan at konink.de
Wed Jun 27 18:16:44 BST 2012


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On 26-06-12 23:05, Frederik Ramm wrote:
> I have had some people asking whether I could supply them with 
> "Retina" map tiles. "Retina" is an Apple brand name for higher 
> resolution displays, and these users tend to mean tiles with twice
> the resolution.

I am glad that "Retina" raises the issue, that is already present on
Android, high resolution displays make the map unreadible. One of the
angles I didn't saw you comment on was: going svg.gz all the way.
Rendering tiles in SVG, doing so with a clue, for example fixed poit
coordinates allows a decent compression over an easy zoom.

The higher the DPI the more bandwidth is required to serve the tiles
anyway, there must be some threshold where it is really more worthwile
to render in whatever GL standard on the client, than sending over
bitmaps as (effectively as textures).


Stefan
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