[OSM-talk] open aerial map

[Christopher Schmidt]

On Wed, Dec 05, 2007 at 06:07:45PM +0000, Bruce Cowan wrote:
> 
> On Wed, 2007-12-05 at 23:44 +1300, Robin Paulson wrote:
> > for those of you that weren't aware:
> > 
> > http://openaerialmap.org/map/
> > 
> > open aerial map is now up and running, with an option to show osm data
> > as an overlay
> > 
> > there is full coverage of the planet, although not all of it is at a
> > useful resolution. of course, users can upload any datasets they have
> > at higher resolution
> > 
> > interesting times, we're now well on the way to a full, open
> > replacement for certain commercial mapping/aerial photography sites
> > 
> > 
> Incidentally, the projection used there makes a right mess of Britain,
> especially Scotland.
> 
> Is there a reason for using (what I assume is) ESPG 4326 instead of
> Mercator?

OAM has already been integrated into 7 different maps other than my own,
on websites out of my control.

OAM provides a spherical-mercator projected tileset for users who are
interested in it, but the 'default' is designed for use by the
cut-and-paste web map developers of the world at the moment, and the
issues that using a mercator projection presents for people who have
been living in EPSG:4326 for so long are large enough that I targeted
the simplest thing that could possibly work first. 

Regards,
-- 
Christopher Schmidt
MetaCarta