1. A computer readable medium having stored thereon a virtual microscope slide data structure for storing images of a specimen, the virtual microscope slide data structure comprising: a first and second set of images at a first magnification derived from contiguous non-overlapping images captured from the specimen; wherein a plurality of images in the first set of images are associated with a first focal plane and a plurality of images in the second set of images are associated with a second focal plane, wherein the second focal plane is displaced relative to the first focal plane; and coordinating information that relates positions of the first and second set of images.