Manipulation of a multi-wide object class design layout to facilitate design rule checking or automatic correction of design rule errors is improved by deriving wide class objects from geometries of the design layout, and applying certain rules to non-virtual boundaries of the wide class objects that are not applied to virtual boundaries of the wide class objects. The light source device includes a light emitting device and a lens structure. Data for creating images of the formations are obtained at or near the bottom of the borehole and proximate to the long gauge bit used for drilling the borehole.