Card device for two-dimensional diagram of three-dimensional surface topography of e.g. city, has represents individual objects in card as details of card and attaches additional information to card details in coded form

摘要

The card device represents individual objects of surface topography in a card in accordance with a predetermined assignment rule as details of the card. The specific detail concerning the additional information is attached to the card details in coded form. The additional information is attached to the card details in form of two-dimensional barcode or two-dimensional watermark. The miniaturization of the barcode or watermark is enabled in an inconspicuous region of the card details.