<div dir="ltr">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 <a href="http://opensciencemap.org/map/#&scale=11&rot=1&tilt=0&lat=45.758&lon=4.894">opensciencemap.org</a>.<div><br></div><div>Any idea if the OSM website is intended to switch to client-side rendering like Google Maps did a few years back ?</div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-01-28 22:40 GMT+01:00 Michael Meier <span dir="ltr"><<a href="mailto:michael.meier@rrze.fau.de" target="_blank">michael.meier@rrze.fau.de</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 01/28/2015 01:32 AM, Paul Norman wrote:<br>
> It would be up to the system administrators and OWG to decide if they<br>
> wanted to deploy retina tiles. Deploying a second set of tiles would<br>
> increase the CDN cache miss rate, increase the rendering required, and<br>
> significantly increase the disk space required for tiles. The last is<br>
> likely to be particularly significant as I don't believe the machines<br>
> have the free disk required to more than double the cache.<br>
<br>
</span>It might be possible to just render/cache the HD tiles, and then scale<br>
them down on the fly for non-HD requests - only one set of tiles would<br>
need to be stored/cached, at the cost of some wasted cpu-cycles for the<br>
scaling.<br>
<br>
However, in addition to the problem of limited resources, I don't think<br>
the style is ready yet. Though there has been a lot of progress lately,<br>
the openstreetmap-carto-style has many symbols, and many still aren't<br>
SVG and thus are not "HD ready" - they look really ugly in HD tiles. I'm<br>
unaware of a public demo-instance, so this is mine, showing how the<br>
openstreetmap-carto-style currently looks like when rendered in HD:<br>
<a href="https://osm.rrze.fau.de/testhd.html" target="_blank">https://osm.rrze.fau.de/testhd.html</a><br>
(this is really just tirex with scalefactor=2.0, tilesize=512,<br>
buffersize=768 set on a checkout of openstreetmap-carto)<br>
<span class="HOEnZb"><font color="#888888">--<br>
Michael Meier, Zentrale Systeme<br>
Friedrich-Alexander-Universitaet Erlangen-Nuernberg<br>
Regionales Rechenzentrum Erlangen<br>
Martensstrasse 1, 91058 Erlangen, Germany<br>
Tel.: <a href="tel:%2B49%209131%2085-28973" value="+4991318528973">+49 9131 85-28973</a>, Fax: <a href="tel:%2B49%209131%20302941" value="+499131302941">+49 9131 302941</a><br>
<a href="mailto:michael.meier@fau.de">michael.meier@fau.de</a><br>
<a href="http://www.rrze.fau.de" target="_blank">www.rrze.fau.de</a><br>
</font></span><div class="HOEnZb"><div class="h5"><br>
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