Prioritized requesting of mapping layers

A mapping system disclosed herein includes a requestor that transmits requests for different layer sets of mapping data for a digital map to one or more data sources across a network according to a predefined order. According to one implementation, the mapping system also processes and/or renders the different layer sets to a display according to the predefined order. 本文中公开的地图系统包括请求器，请求器根据预定义的顺序跨网络向个或多个数据源传输针对数字地图的地图数据的不同层集合的请求。根据个实现，地图系统还根据预定义的顺序来处理和/或向显示器渲染不同层集合。