[OSM-dev] OSM for Retina and high-pixel density devices

[Éric Gillet]

I think the wisest approach is client-side rendering of OSM data, which
would allow for map display for any resolution/density, and even allow
customization according to user's interest. An example can be found on
opensciencemap.org
<http://opensciencemap.org/map/#&scale=11&rot=1&tilt=0&lat=45.758&lon=4.894>
.

Any idea if the OSM website is intended to switch to client-side rendering
like Google Maps did a few years back ?

2015-01-28 22:40 GMT+01:00 Michael Meier <michael.meier at rrze.fau.de>:

> On 01/28/2015 01:32 AM, Paul Norman wrote:
> > It would be up to the system administrators and OWG to decide if they
> > wanted to deploy retina tiles. Deploying a second set of tiles would
> > increase the CDN cache miss rate, increase the rendering required, and
> > significantly increase the disk space required for tiles. The last is
> > likely to be particularly significant as I don't believe the machines
> > have the free disk required to more than double the cache.
>
> It might be possible to just render/cache the HD tiles, and then scale
> them down on the fly for non-HD requests - only one set of tiles would
> need to be stored/cached, at the cost of some wasted cpu-cycles for the
> scaling.
>
> However, in addition to the problem of limited resources, I don't think
> the style is ready yet. Though there has been a lot of progress lately,
> the openstreetmap-carto-style has many symbols, and many still aren't
> SVG and thus are not "HD ready" - they look really ugly in HD tiles. I'm
> unaware of a public demo-instance, so this is mine, showing how the
> openstreetmap-carto-style currently looks like when rendered in HD:
> https://osm.rrze.fau.de/testhd.html
> (this is really just tirex with scalefactor=2.0, tilesize=512,
> buffersize=768 set on a checkout of openstreetmap-carto)
> --
> Michael Meier, Zentrale Systeme
> Friedrich-Alexander-Universitaet Erlangen-Nuernberg
> Regionales Rechenzentrum Erlangen
> Martensstrasse 1, 91058 Erlangen, Germany
> Tel.: +49 9131 85-28973, Fax: +49 9131 302941
> michael.meier at fau.de
> www.rrze.fau.de
>
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