Mass line thinning drawing method applied to mobile terminal map

The invention discloses a mass line thinning drawing method applied to a mobile terminal map, which comprises the following steps of: obtaining mass line data, and storing the mass line data into a set X; performing priority ranking on the set X; calculating the maximum displayable broken line number Max of the map; thinning a large number of threads; drawing broken lines in the set P in real time; and if the map is zoomed or dragged, opening a new round of broken line clearing and traversing. The method has the characteristics that hundred thousand-level mass lines can be processed, the smoothness of a map page is ensured, the efficiency of drawing the mass lines is improved, and the user experience is improved. 本发明公开了一种应用于移动端地图海量线抽稀绘制的方法，包括如下步骤：获取海量线数据，并存储到集合X中；对集合X进行优先级排序；计算地图最大可显示折线数量Max；海量线抽稀；实时绘制集合P中的折线；若地图缩放或拖动时，开启新一轮的折线清除和遍历。本发明具有能够处理十万级的海量线，保证地图页面流畅，提升了绘制海量线的效率，提升了用户体验的特点。