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- The architecture of CORBA-based Distributed Geographical Information System (DGIS) and methodology of distributed spatial query and its optimization were discussed in this paper. 本文研究基于CORBA的分布式地理信息系统（DGIS）体系结构和分布式空间查询及其优化。
- distributed spatial query 分布式空间查询
- We improve the algebra of standard SQL with this spatial relation model,design and implement a multi-dimensional qualitative spatial query language MQS-SQL. 利用该模型扩充了标准SQL语言的关系代数;实现了混合维定性空间查询语言MQS-SQL.
- ORDBMS Oracle9i provides a new SQL (Spatial Query Language), the spatial data model, the standardization of spatial connection and the set of spatial manipulation. 对象关系型数据库管理系统Oracle9i提供了一种全新的SQL(Spatial Query Language)、空间数据模型、空间关系规范化及空间操作集。
- Spatial Information Portal allows user to access distributed spatial information directly and is one of the most important parts of spatial information infrastructure. 空间信息门户为用户提供一个统一的入口访问分散异构的空间信息资源,是国家空间信息基础设施的重要组成部分。
- Since distributed spatial database will be the main data source of Internet GIS, we have to cope with the intercommunication between heterogeneous databases and systems. 摘要随着空间数据获取能力的飞速发展，分布式存储管理的空间数据库将成为网络GIS的主要数据源。
- So, basing on the research of CORBA model and distributed spatial database, integrating computer supported cooperative work (CSCW), the paper adopts four tiers architectural structure to construct the distributed GIS. 本文在深入研究CORBA规范和计算机支持协同工作(CSCW)的基础上，采用四层的体系结构构建分布式GIS。
- Research on Spatial Query Optimization 空间查询优化研究
- It takes an important role during the process of GIS data modeling, spatial querying, spatial analysis, spatial deduction, cartographic synthesis and understanding. 目前国际上对空间关系的研究主要集中在空间关系的语义问题、空间关系描述、空间关系表达、基于空间关系的查询分析等方面。
- Topological Relationships in Spatial Query Languages 空间查询语言中拓扑关系的定义
- Integrated Processing Strategies for Spatial Query and Path Search 空间查询和路径搜索的集成处理策略
- Research an Design of Spatial Query Language GSQL and It's Interpreter 空间查询语言GSQL及其解释器的研究与设计
- The letter was referred back (to us) with a query. 该函已退给(我方)要求对某问题加以解释。
- They distributed leaflets to customers. 他们给客户散发传单。
- Query, when will they carry out the project? 请问,他们什么时候执行这一方案?
- The mother distributed candy among children. 母亲给孩子们发糖果。
- I have a query about his sincerity. 我对他的诚意有怀疑。
- The mayor ordered that free food be distributed. 市长命令发放免费食品。
- Land was more equitably distributed. 土地得到更公平合理的分配。
- They had distributed the lands among the peasants. 他们把土地分给农民。
