A method removes distortion induced by camera tilt from a digital representation of a photograph taken with a rotational or swing-lens panoramic camera. Preferably, the movement converting means includes a rack and pinion mechanism 22, 30 supported by a support member 14 of the operating device 10, one end of a rack 22 element of the rack and pinion mechanism being attached to a distal part of the telescopic handle 12, and a pinion gear 30 being provided on the support member 14 and drivable by the rack element 22. In one embodiment, the magnesium silicates include talc, the potassium aluminum silicates include micas, the aluminum silicates include clays, and the calcium silicates include wollastonite. During memory read operations, therefore, data can be coupled to output buffers without being subjected to delays through a compression circuit. The supplemental database has a relatively small set of WLAN-enabled access points and corresponding inferred locations.