基于OSGEarth在线服务分开叠加问题的一种解决方案  

A Solution to the Problem of Separating and Overlying Online Services Based on OSGEarth

作　　者：柳嘉 陈翠珍 刘敏 张志鑫 刘达[1,2] LIU Jia;CHEN Cuizhen;LIU Min;ZHANG Zhixin;LIU Da(Network and Information Center,Changjiang Water Resources Commission,Wuhan 430010,China;Technology Innovation Center of Digital Enablement for River Basin Management,Changjiang Water Resources Commission,Wuhan 430010,China;Wuhan Water Research Institute,Wuhan 430010,China;Wuhan Service Flood Control and Information Center,Wuhan 430010,China)

机构地区：[1]长江水利委员会网络与信息中心,湖北武汉430010 [2]长江水利委员会流域管理数字赋能技术创新中心,湖北武汉430010 [3]武汉市水务科学研究院,湖北武汉430010 [4]武汉市水务防汛信息中心,湖北武汉430010

出　　处：《现代信息科技》2025年第3期105-108,114,共5页Modern Information Technology

基　　金：长江委流域管理数字赋能技术创新中心基金项目(WXC2311101)。

摘　　要：在使用OSGEarth三维地球引擎进行大规模地理空间数据可视化时,细节层次(Level of Detail,LOD)技术通过动态调整地形和模型的细节层次,在保证视觉质量的同时,显著降低了计算负载和资源消耗。但在分开叠加影像层与地形层在线服务数据时,由于两类数据服务层级精度不匹配,渲染时将出现白块、断层塌陷等视觉问题,文章提出了一种通过实时重采样自动创建子瓦片的方案,对影像图层与地形图层的精细层级不同的问题进行双线性重采样,有效解决白块和断层塌陷等现象,拥有良好的应用前景。When the OSGEarth 3D Earth Engine is used for large-scale geospatial data visualization,the LOD(Level of Detail)technology dynamically adjusts the level in detail of terrain and models to significantly reduce computational load and resource consumption while ensuring visual quality.However,when separating and overlying online service data for image and terrain layers separately,visual problems such as white blocks and fault collapse will occur during rendering due to the mismatch in accuracy between the two types of data service levels.This paper proposes a solution for automatically creating sub tiles through real-time resampling,which effectively solves phenomena such as white blocks and fault collapse and has a good application prospect.

关 键 词：OSGEarth 分开叠加 子瓦片 白块 断层塌陷 实时重采样 

分 类 号：TP311.1[自动化与计算机技术—计算机软件与理论] TP391.4[自动化与计算机技术—计算机科学与技术]