Abstract:

Over the past nearly 20 years, there is a huge development in active fault database related technologies in China, mass of active fault data has provided us important basis for researching on earthquake and disaster reduction, etc. However, with the appearance of huge amount of active fault data, lots of problems have emerged, such as data redundancy, inefficient management and information islands, etc. One of the major reasons is lack of efficient method to share the active fault data we owned.By study and comparison, we find that WebGIS is a good solution to solve the problem of active fault data publishing and sharing. WebGIS has well combined the advantages of traditional GIS and internet technologies, it could also share geographic data quickly, provide abundant browsing, searching and analysis functions. Based on the project of "China Earthquake Active Fault Detection—The North China Tectonic Region", and taking the foundational database information sharing platform of the active fault detection and survey as an example, the paper introduces the key technologies of active fault data sharing platform with latest WebGIS technology. The sharing system, which employs ArcGIS Server 10.0 as the GIS server, and utilizes MS-Silverlight technology at the client side, makes use of three-layer architecture which is popular in current B/S mode. To guarantee the security of the database on the internet, data source in the backend of the system is a simplified version of the active fault database of the North China tectonic region. Finally, the system has realized the publishing and sharing of 1 ︰ 50000 active fault mapping and main geophysical survey lines in North China tectonic region, and moreover, it provides some conventional map operations as well as fault searching and locating functions.The wide use of active fault data decides the significance of sharing system. It is very convenient to use this lightweight data sharing system to provide important basis for relevant industries, such as urban planning, land use and engineering site option, etc.

Key words: active faults, WebGIS, data sharing, data publishing

摘要：

对中国活动断层数据库建设的发展成果进行了简单介绍, 以“华北构造区活动断层探测和调查基础数据库信息共享平台”的建设过程为例, 讨论了通过WebGIS实现活动断层数据发布与共享的可行性, WebGIS技术可较好地解决活动断层数据的共享问题。共享系统总体目标是快速安全地共享高精度、专业化的活动断层数据。系统采用B/S模式流行的3层架构结构: GIS服务器+Web服务器+客户端浏览器, 后端数据库是将多个华北地区的活动断层子库集成后的总数据库。系统不但具有基本的浏览、查询功能, 还可以进行条件查询、点击查询、断层定位等细粒度的操作。现阶段系统建设重点放在了“数据共享的实现”和“数据精度”上, 借助GIS的强大功能还可以实现更多, 比如在线编辑、自定义GP模型等。

关键词: 活动断层, WebGIS, 数据发布, 数据共享