Using a dowsing instrument like a map, or a digitalised aerial photograph, allows your subconscious to tap in to the wealth of information available from this superconscious energy.
aerial photo from google maps
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the above as embedded data
see also http://nigelayers.blogspot.com/2010/02/walls-of-dobbe.html
It follows, therefore, that dowsing using digital information is the most physical type of dowsing because it is closely related to your body's own sensitivity to the informational currents that surround us. Using computer graphics in this research allows the physical body to tune in to electrical currents. It becomes more psychic in nature however, because you really have to let your rational mind let go of preconceptions in order to get in touch with energies of which you may not be fully conscious. This simple intuition is the reason many people talk to their computers.