中文摘要：

针对现有网络地理信息系统（WebGIS）负载均衡技术的缺陷，分析利用集群技术解决WebGIS负载均衡的必要性和可行性，提出基于地图服务器场的WebGIS分布式负载均衡模型，研究地图服务器场分布式动态均衡调度算法，建立试验床，通过一系列的试验结果验证了该算法良好的全局网络负载性。

英文摘要：

Aiming at deficiencies of load-balancing technology in the existing WebGIS, the paper analyzes the necessity and feasibility of cluster technology and proposes a new distributed load-balancing model based on map server farm to improve WebGIS performance. The algorithm, named distributed dynamic load-balancing scheduling algorithm, is researched as the core component in the model. A test-bed is established. A series of test results prove that the algorithm has good global load balancing performance.