| 基于元数据和数据集管理的应用模型研究 |
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| 引用本文： | 赖志斌,夏曙东,王浒,承继成.基于元数据和数据集管理的应用模型研究[J].地理科学进展,2002,21(4):374-382. |
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| 作者姓名： | 赖志斌 夏曙东 王浒 承继成 |
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| 作者单位： | 北京大学遥感与地理信息系统研究所,北京,100871 |
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| 基金项目： | 中国科学院地理科学与资源研究所知识创新工程领域前沿项目 (CXIOG- B0 0 - 0 1 - 0 1 )，国家自然科学基金资助项目 (40 1 71 0 39) |
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| 摘 要： | 元数据是解决数据共享的技术手段之一 ,现有以元数据为基础的管理模型和管理系统主要针对元数据本身的管理 ,元数据和数据集在管理上是相对独立的 ,这直接导致了元数据和数据集的不一致性。在元数据与数据集内在联系的基础上 ,本文提出了实现元数据和数据集一体化管理的应用模型 ,该模型由综合管理层、服务层、应用层三层体系结构组成 ,通过服务流、数据流、元数据流的交互 ,实现元数据和数据集的同步一体化管理。从数据集对象的建立、数据集对象的查询和获取、数据集对象的变更三个应用方面 ,文章详细阐述了该应用模型的实现流程。
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| 关 键 词： | 元数据 数据集 IIMS |
| 文章编号： | 1007-6301(2002)04-0374-09 |
| 收稿时间： | 2001-08-01 |
| 修稿时间： | 5/1/2002 12:00:00 AM |
Research of Application Model Based on Management of Metadata and Dataset |
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| Zhang Yi feng,Wang You feng,Liu Lu xiang,Chen Mao he.Research of Application Model Based on Management of Metadata and Dataset[J].Progress in Geography,2002,21(4):374-382. |
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| Authors: | Zhang Yi feng Wang You feng Liu Lu xiang Chen Mao he |
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| Institution: | RS and GIS Institute of PeKing University, Beijing 100871 China |
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| Abstract: | Developing the cool cold resource is the most important direction of crop and livestock integrated arid regions in north China. Only by this can this region change the disadvantages of aridity and coldness to the advantages of the regional development. Coldness and aridity provide an ideal environment to the vegetables that prefer cold weather to warm weather. And the development of vegetable market of north China will supplement the off season market of Beijing and Tianjin, and even of other temperate zones in China. So currently lots of regions excavate the cool cold resource and produce the proper commodity. Based on the low temperate resource of Yangyuan County, Hebei province, this paper analyzes the advantages for Yangyuan to develop cold loving vegetable. Now Yangyuan County has been appointed as one of the producing base of vegetable. So if Yangyuan County catches this chance to improve industrial level of vegetable, it will be good to not only the economy of Yangyuan, but also to Beijing and Tianjin consumer markets. Now the most important work for Yangyuan County is to adjust the structure of vegetable industry. The development of vegetable industry must keep up with the need of the national and world market. At the same time, the development of vegetable industry must depend on the improvement of technology to get high quality produce. |
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| Keywords: | Cool cold weather resource Resource exploitation Structure adjustment of vegetable industry |
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