A Research Review of Map Cache Technology Based on Web
Zhang Jin-we · Geomatics & Spatial Information Technology · 2015
The performance demands of web map service platform are higher and higher,with the number of concurrent access for web map service increasing. Map cache technology cuts map into certain specification pictures according to the mathematical rules in advance and saves the map tiles to the map servers,map servers quickly return titles corresponding to the current area according to the request parameters,so that it can achieve dynamic display effect using static images. Map cache technology is one of the hot spots in web map service areas,effectively reducing the server computing load and network transmission burden,greatly improving the interactive efficiency of client and server,enhancing the application level of web map service and improving the experience of client users.But there are still some technical difficulties to be solved,such as it takes a long time to make map tiles,a large number of map tiles data occupy a lot of space,it is very difficult to update the map cache data and so on. In this paper,we dig out the researches and technical aspects can be enhanced for map cache technology in updating the static cache tiles data,switching the cache strategy combined with static cache strategy and dynamic cache strategy,optimizing the cutting response efficiency of map cache on demand,designing the mixed storage mode,updating a wide range of tiles data,syncing the file system organization model and database organization model,storing the map tiles data elasticity under distributed environment,and hope to provide a reference for the future studies,with collating and summarizing the current mainstream researches,emphatically analyzing the researches and research status of map cache technology in all aspects and distributed environment.