[OSM-talk] Wrong scale in slippy map

[Iván Sánchez Ortega]

El Viernes, 24 de Abril de 2009, Juan Lucas Dominguez Rubio escribió:
> I think we ought to be able to do a projection where we turn the globe
> into a symmetrical regular polyhedra. In effect at zoom level zoom
> level 1 the world is a tetrahedron, as you go up you add more
> equilateral triangles. while keeping your angles the same.
>
> At each higher zoom level each triangular faces is split into 3
> triangles. creating what gets closer and closer to a globe. Same way
> as some footballs are made up of hexagons......

Nah, you really mean any azimuthal projection centered on the facets of a 
geodesic sphere. IIRC, it has been proposed already, some time ago.

Unfortunately, that means a complete overhaul of the renderers, *plus* 
switching openlayers from one projection to another on-the-fly when the user 
pans out of the current projection, *plus* a lenghty discussion on whether a 
gnomonic or an orthographic or a stereographic or a lambert azimuthal 
projection is best.


It'd be cool, but I don't think it's worth the hassle right now.


-- 
----------------------------------
Iván Sánchez Ortega <ivan at sanchezortega.es>

Un ordenador no es un televisor ni un microondas, es una herramienta compleja.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 197 bytes
Desc: This is a digitally signed message part.
URL: <http://lists.openstreetmap.org/pipermail/talk/attachments/20090424/078550c5/attachment.pgp>