CAJ | 학술논문

GIS应用的快速发展对异构空间数据库互联互访提出了更高的要求。本文对现有的多种异构空间数据库互操作模式进行了对比分析，指出了各种模式的特点及其不足，在此基础上，提出了一种开放式空间数据库互联互访(OGDC，Opening Geospatial Database Connectivity)的策略与规范，以及由各家 GIS 平台软件厂商共同制定标准接口，再由数据库开发厂商或数据提供厂商按照标准接口进行开发实现的新模式。本文对OGDC的设计思路、技术特点和应用情况进行了分析，设计了地理空间数据库的数据访问对象模型及接口，并使用国产空间数据库软件BeyonDB，对OGDC作了开发和实验验证。实验表明，OGDC可以较好地兼顾空间数据互联互访中系统功能、效率和易用性等方面的需求，为异构空间数据库的标准化共享和持续利用提供了一种较为可行的解决方案。
GIS응용적쾌속발전대이구공간수거고호련호방제출료경고적요구。본문대현유적다충이구공간수거고호조작모식진행료대비분석，지출료각충모식적특점급기불족，재차기출상，제출료일충개방식공간수거고호련호방(OGDC，Opening Geospatial Database Connectivity)적책략여규범，이급유각가 GIS 평태연건엄상공동제정표준접구，재유수거고개발엄상혹수거제공엄상안조표준접구진행개발실현적신모식。본문대OGDC적설계사로、기술특점화응용정황진행료분석，설계료지리공간수거고적수거방문대상모형급접구，병사용국산공간수거고연건BeyonDB，대OGDC작료개발화실험험증。실험표명，OGDC가이교호지겸고공간수거호련호방중계통공능、효솔화역용성등방면적수구，위이구공간수거고적표준화공향화지속이용제공료일충교위가행적해결방안。
With the fast development of GIS technology and improvement of the GIS application technology, higher requirements have been put forward to the spatial database connectivity and accessibility. This study first proposes a comparative analysis on cross-sectoral large-scale shared connection to spatial database, thus to point out the hard-to-achieve synchronization updating during different data types conversion. Direct data access mod-el cannot be fully compliance with the data type updating. The spatial extension model of the relational database is dissatisfactory in performances as well as professional spatial analysis. The support of Web Service model is insufficient for non-standard spatial data types; the protocols provided by software providers are of great specific-ity and difficulty to be extended by third parties. Then in this article, the interfaces of heterogeneous databases connectivity are analyzed deeply. Currently there are two categories of interfaces which are the relational data-base access interfaces and spatial database standard interfaces. Based on the analysis, the article proposes the‘Opening Geospatial Database Connectivity (OGDC)’interfaces mechanism and specifications to provide a completely new model that a series of standard interfaces provided by several GIS platform software providers is jointly realized by database providers or data providers based on these standard interfaces. Detailed introductions are presented for the OGDC designs, technical features, implementation techniques, and applications. Finally, the feasibility and advantages of these proposed standards and specifications are demonstrated by a prototype using the OGDC from the domestic-developed distributed spatial database software‘BeyonDB’. And the prototype shows that OGDC could perfectly take account of the functionality, the efficiency and the usability of the spatial database connectivity, thus to provide a new application model for the standardized sharing and continual utiliz-ing of the heterogeneous spatial database.