"In the future, cell phone users will be able to leave messages anywhere in the form of what might be termed electronic post-its. They will be able to post virtual messages referring to a specific location wherever they are needed. Siemens researchers have now created the technical basis and the computer programs for this "digital graffiti service." (press release)
More details in pdf-ed press release and here:
"Digital messages can be attached to pictures of a local sight to provide information about the building. The radius in which the message can be received can be selected by the writer of the message. Buildings visible from far off - the Acropolis in Athen, for instance - can be given a larger radius of a few miles enabling tourists to read the graffito as well from a long way away."
Grafedia: Hyperlinked Buildings
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