摘要：Spatial Information has special format, diverse storage and large amount of data volume, together with the existing limitation of the network bandwidth, all those above caused some barriers to its transfer application. This paper focuses on a progressive transmission scheme for vector spatial data, it consists of three parts: hierarchical simplification of vector spatial data based on improved genetic algorithm, a multi-level incremental storage model in accordance with the fixed scale progressive transmission, data extraction and data restructuring by traversing the incremental data. At last, the paper tests the algorithm of the hierarchical simplification and the response time in client side, the results prove that the method we proposed are useable.
关键词：vector data;progressive transmission;hierarchical simplification;multi-level incremental model
