The invention provides an online map tile fast loading and caching optimization method, medium and
system, and belongs to the technical field of map
processing.The method includes the steps that a tile index
database and an exchange priority matrix are established, a
viewport moving trend vector is calculated according to user sliding operation, a future
viewport range is predicted, and a preloaded tile
list is screened; the method comprises the following steps: performing cache validity check on tiles, establishing a small
change detection vector to judge whether updating is needed, establishing a tile
hit rate statistical matrix, fusing a time
decay factor and a
spatial correlation factor to calculate a popularity
score, and gathering high-popularity tiles in a quick access area by adopting a
thermodynamics-imitating entropy reduction
algorithm to realize cache ordering. And the next tile demand of the user is predicted, so that the technical problem that the overall loading response speed is reduced due to an overlong high-value tile access path caused by disordered distribution of cache resources in the online map tile loading process is solved.