Hi resolution images
Gigapixel photographs are single large images of many gigapixels created by stitching together lots of individual photos (typically taken with a long zoom lens) to capture lots of close shots to assemble into one large gigapixel image.
At the moment we are only experimenting with 112 mega-pixel photos (about a tenth of a gigapixel) using 18 photographs to produce a 360 panorama of 15,000 pixels by 7500 pixels high. As many of the pixels are used to wrap around a whole 360 degrees, that doesn't leave much room for zoom-in detail. We'll keep experimenting.
We've used the muti-resolution cube format to render the pixels in your browser dynamically.