MOBILE MAPPING IN UNDERGROUND OR SHIELDED ENVIRONMENTS

摘要

A method for providing location information such as a map in an underground or shielded environment entails storing first near-field communication (NFC) data obtained by reading a first NFC tag at a first location, reading a second NFC tag at a second location, obtaining map data for an area encompassing the first and second locations, and displaying a map showing the first location and the second location.