Caching geographic data according to server-specified policy

摘要

Caching or discarding geographic data received at a client computing device may be based on a caching policy for the geographic data. A caching policy may define conditions to process the geographic data at the client device based on several factors. For example, a current position of the client device or a position of a portion of a map displayed within a viewport of the device may cause the device to cache or discard the received geographic data. The device may determine a relationship between the viewport and the received geographic data, compare the determined relationship to the caching policy and cache or discard at least a portion of the received geographic data based on the comparison.

主权项

1. A computer-implemented method for processing geographic content in client computing devices, the method comprising:
receiving, at a client computing device from a server, geographic data and a caching policy for the geographic data, the geographic data related to a first geographic location and the caching policy defining one or more conditions to cache or discard the geographic data at the client computing device including a distance threshold; displaying the geographic data within a viewport of the client computing device when the viewport depicts a digital map corresponding to the first geographic location; moving the viewport to an updated position corresponding to a second geographic location; determining a physical distance between the first geographic location and the second geographic location; comparing the determined physical distance to the distance threshold; and caching or discarding the received geographic data based at least in part on the comparison, including caching the received geographic data when the physical distance is below the distance threshold and discarding the received geographic data when the physical distance is above the distance threshold.