【摘要】 层次网格索引是在传统网格索引的基础上 ,进一步改进 ,减少了传统网格索引的冗余和索引的大小。在层次网格索引的基础上 ,利用客户端和服务器端的双缓冲机制 ,可以减轻网络传输和服务器的负担 ,提高WebGIS应用的整体性能。更多还原

【Abstract】 Multilayer grid index can reduce the redundance and index size of traditional grid index, so that the entire grid index can be loaded to client side. Based on multilayer grid index, we constructed caches both in client side and in server side. The application of multilayer grid index and double cache can reduce the load of network transmission and the server, thus improve the overall performance of WebGIS.更多还原