Compound Lenses for Multi-Source Data Presentation

According to an embodiment of the present invention, an appearance of a lens in an image is displayed. The appearance of the lens includes a focal region having a focal region having a magnification and a plurality of facets. The facets display information from respective layers of the image. The appearance of the lens also includes a base defining an extent of the appearance of the lens in the image. Additionally, the appearance of the lens includes a shoulder region between the focal region and the base. The shoulder region provides context for the focal region with respect to portions of the image outside of the appearance of the lens by preserving visibility of information surrounding the focal region.