As a mobile phone map, the redundant data that can be reduced is map data. In order to make the map of Gaode occupy the minimum storage space under the premise of ensuring normal use, the basic method is to reduce the map data.

Specific operation: only install the necessary things, one is the main program, the other is the national outline map, and the third is the useful city map. Do not install unnecessary map data. In this way, the entire data volume of Gaode map is 200-300 megabytes, without running around or even 100 megabytes (only using local maps).