[OSM-dev] Can we have higher resolution tiles?

[Laurence Penney]

On 15 Jun 2011, at 13:42, Andy Allan wrote:

> On Wed, Jun 15, 2011 at 1:23 PM, Parveen Arora <osm at parveenarora.in> wrote:
>> On Wed, Jun 15, 2011 at 10:10 AM, Graham Jones <grahamjones139 at gmail.com> wrote:
>>> Hi Parveen,
>>> Do you mean resolution (pixels per inch) or level of detail (which icons
>>> appear at which zoom level?).
>> Yes I meant to pixels per inch.
>> 
>>> You can change the resolution if you use mapnik2, but that is something you
>>> would want to do for printed output rarher than a web based map?
>> Yes, someone asked me to print them for his area, but one I printed is
>> not of good quality.
>> So I wants to increase the resolution of tiles for local OSM Tile Server.
> 
> OK, so it's impossible to change the resolution of images, since they
> don't have a resolution. Images only have a number of pixels, that's
> it

It's not so badly expressed. It's reasonable to say "Google Maps on an iPhone 4 has higher resolution tiles than Google Maps on an iPhone 3G." In fact, when I'm paying per byte, roaming on my iPhone 4, I've quite often wanted to like to select "lower resolution tiles" (that's the way I think of it, which seems reasonable), on the assumption that the higher res screen consumes 4x the map data.

- L