[mapserver-users] project onto a globe?

Drew from Zhrodague drew@zhrodague.net
Tue, 26 Nov 2002 14:12:30 -0500 (EST)


> Tom -
> 
> If I understand correctly, what you folks in the UK call a "2D representation of a globe" is known as a "circle" over here <g>.
> 
> Is that right?  There are certainly map projections available that project the surface of the entire Earth onto a circle, such as the Azimuthal Equidistant.  However, they of necessity introduce gross distortions at the edges (away from the center point of the projection).  This is also true of projections like Mercator and your example map, but those projections are common enough that they "look normal" to most people.
> 
> You can see a good example of the Azimuthal Equidistant used to map the whole Earth (centered on North America) at:
> 
> http://www-ccs.ucsd.edu/gmt/doc/html/GMT_Docs/node86.html

	Anyone have a link for a brief desctiption of the different 
projections, for s non GIS people?

	I'd like to render our maps onto a flat-model, just not sure which 
projections do what.

--

drew@zhrodague.net
http://www.WiFiMaps.com