Paris

[Ian Wood]

On 15 Mar 2010, at 15:58, stephen barncard wrote:

> What allows this incredible zooming capacity?

Huge numbers of photos, and then being displayed via an image pyramid  
- the image is rescaled several times and then each size is split into  
tiles - as you navigate around the image, only the relevant tiles for  
the that zoom level are downloaded.

It's pretty standard stuff for viewing hi-res images, quite similar to  
Google Earth/Maps etc.

Ian