[OSM-talk] OSM gets mentioned in KDE4 keynote speech at Google Headquarters

[Artem Pavlenko]

On 22 Jan 2008, at 22:18, Martijn van Oosterhout wrote:

> On Jan 22, 2008 9:41 PM, Artem Pavlenko  
> <artem.mapnik at googlemail.com> wrote:
>> I wonder why geographical projection for tiles ? They look quite
>> distorted when warped on sphere:
>> http://artem.dev.openstreetmap.org/files/marble-osm.jpg
>> Maybe spherical Mercator (same as in GMap) would produce better  
>> results.
>
> Problem is that mercator doesn't work for the poles, which is kinda
> important for 3D. Also as you get closer to the poles you need to load
> more tiles to cover the same area. Plate Carre isn't perfect, but it's
> much better for this purpose. If we setup a tileserver to render in
> platecarre that might at least fix the stretching, maybe...?

Yep, you're right, Mercator is no help.
  BTW, I rendered tiles (for marble) in Lat/Lon aka Geographic, Plate  
Carre, equirectangular,cylindrical equidistant, unprojected etc.
Still, there are too many re-sampling artifacts. I'll try smaller  
tile sizes ..

>
> Have a nice day,
> -- 
> Martijn van Oosterhout <kleptog at gmail.com> http://svana.org/kleptog/


Cheers
Artem