长江科学院院报 ›› 2016, Vol. 33 ›› Issue (11): 73-77.DOI: 10.11988/ckyyb.20160809

• 地理信息技术与应用 • 上一篇    下一篇

面向虚拟地球系统的多尺度影像瓦片数据实时创建技术

洪 宇1,刘 金2,康林冲2,姜晓轶2,孔祥勤1   

  1. 1.深圳市海洋环境与资源监测中心,广东 深圳 518034;
    2.国家海洋信息中心,天津 300171
  • 收稿日期:2016-08-10 出版日期:2016-11-20 发布日期:2016-11-08
  • 通讯作者: 刘 金(1980-),男,湖北荆门人,高级工程师,博士,从事海洋GIS、三维可视化相关工作,(电话)13512007804(电子信箱)183059511@qq.com。
  • 作者简介:洪 宇(1981-),女,湖北荆门人,工程师,硕士,从事海洋GIS、海域使用动态监管、三维可视化相关工作,(电话)13632706272(电子信箱)9033431@qq.com。

Creating Tile Pyramid in Real-time for Multi-scale ImagesUsing Virtual Globes

HONG Yu1, LIU Jin2, KANG Lin-chong2, JIANG Xiao-yi2, KONG Xiang-qin1   

  1. 1.Shenzhen Marine Environment and Resources Monitoring Center, Shenzhen 518034, China;2.National Marine Data and Information Service, Tianjin 300171, China)
  • Received:2016-08-10 Online:2016-11-20 Published:2016-11-08

摘要:

针对传统虚拟地球系统对多分辨率影像预先切片构建瓦片金字塔,导致的数据通用性差、数据更新效率低等问题,提出了一种实时创建多尺度影像瓦片数据的改进技术。设计并构建多尺度影像金字塔模型,对影像进行逻辑上的裁剪和接边处理,并将多尺度影像金字塔工程发布为数据服务,基于多核处理器设计影像切片并行算法实现用户实时响应请求。采用World Wind虚拟地球系统选择广东及海南区域的多源影像进行试验,试验结果证明该技术能够方便地管理影像数据,满足虚拟地球系统的并发访问需求,并能极大地提高数据更新效率。

关键词: 虚拟地球系统, 多尺度影像, 瓦片金字塔, 实时创建, 并行计算

Abstract:

In this research we propose an improved approach of creating tile pyramid in real time for multi-scale images to resolve the problems of poor versatility of image data and low efficiency of data updating caused by traditional virtual globes to create tile pyramid beforehand. In the proposed model, clip and mosaic of images in logic sense are obtained, and then the tile pyramid project is published as data service, and tile data is created in real time by a parallel computing program based on multiprocessor. The model was trialed with Worldwind using the multi-source images of Guangdong and Hainan Provinces. Test results show that the present method is convenient in managing original image data and responding customers’ requests. Meanwhile, it remarkably improves the efficiency of updating image data.

Key words: virtual globes, multi-scale image, tile pyramid, real-time creating, parallel computing

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