Throughout the history of cartography, the effective use of maps means understanding a series of abstract symbols drawn on a plane, and then associating these symbols with various three-dimensional features of the local environment to successfully determine your location. But this is not All ordinary people can do it, and not long ago, the map itself was a scarce artifact, and some maps were classified as military sensitive. However, the maps that can be seen on the mobile phone screen changed all this. This text focuses on explaining. ['The development of cartography has gone through a long historical process.', 'There are many technical difficulties in the use of mapping.', 'The advent of smartphones has promoted the development of cartography.', 'Smartphones have greatly improved the quality of human life.']