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

[Robert Joop]

On 12-06-27 19:16:44 CEST, Stefan de Konink wrote:
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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

Why unreadable?
What viewport setting do you use?
For example, when you use the same viewport width 320 on both iPhone
and iPhone 4, then the map looks the same on both devices, right?
It’s just that it doesn’t look as crisp as could be on the iPhone 4.

> 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.

How good is the SVG support on mobile devices?
What about devices without decent SVG support?
Do you want to have two rendering pipelines, one SVG for higher pixel
ratios and one PNG for less capable devices/browsers?

rj