面向数字孪生水利的动态矢量切片服务关键技术与应用OA

With the comprehensive advancement of digital twin water conservancy construction,water conservancy business systems faced increasingly urgent demands for the dynamic rendering of massive spatial data.Conventional raster tile solutions based on the WMS protocol suffered from several bottlenecks when handling nationwide water system data,including lengthy tile pre-generation cycles,the inability to update dynamic attributes in real time,and excessive server load under high-concurrency conditions.This paper proposed a high-performance dynamic vector tile system tailored for water conservancy applications.Built on a technology stack centered on the PostGIS spatial database and the Martin tile server,the system targets 140 000 river polyline features,95 000 reservoir point features,and more than 7 000 irrigation district polygon features at the national scale.A request-driven dynamic tile generation algorithm,a multi-level LRU caching strategy based on geospatial extent,and a dynamic attribute injection mechanism were designed and implemented.At the theoretical level,formal models were established for tile-generation time complexity and cache hit rate,and their predictive accuracy was validated through experiments.At the engineering level,the system has been deployed in production on the Digital Twin Platform of the Ministry of Water Resources,supporting high-concurrency map application scenarios such as basin flood control and river and lake management.