GIS系统可获得并处理描述地球表面的空间数据。
GIS systems acquire and process spatial data describing the Earth's surface.
为了提高空间数据的表示和处理能力，对空间对象进行准确的描述是非常必要的。
To improve the spatial data representation for their subsequent processing, a description for spatial objects is indispensable.
描述地球表面的基础地理信息数据是国家空间数据基础设施建设中的重要组成部分。
National Digital Geospatial data Framework is the important component of National spatial data infrastructure, and will serve widely to ITS.
本文采用地理标记语言gml来描述空间数据，并结合XML数据库技术对GML数据的组织、存储和管理等问题进行研究。
Geography Mark Language (GML) is used to describe the spatial data in this paper. Then it studies on the organization, storage and management of GML data by integrating XML database technology.
下设生物学收藏物、经济植物学、地理学、数据描述结构、加工和空间数据标准等几个附属工作组。
It has several subgroups which including Biological Collections Data, Economic Botany, Geography, Structure of Descriptive Data, TDWG Process and Spatial Data Standards.
为实现空间数据共享，需要描述空间数据或数据集的内容、质量、状态和其他特性的数据，这就是元数据。
To share space data, it is necessary to describe space data or the content, quality and mode of a data set and other characteristic data. This is the element data.
空间数据挖掘中所依赖的空间相关性是由空间关联规则描述的。
The spatial dependence in data mining is normally represented by spatial association rules, which provide the critical information in assessing spatial correlations in large spatial databases.
为了描述空间数据的模糊性，把模糊集理论引入GIS，以加强GIS对模糊现象建模的能力，因而产生了模糊数据。
In order to enhance the ability of modeling fuzzy phenomena, the fuzzy set theory is introduced into GIS, which produces fuzzy spatial data.
为了描述空间数据的模糊性，把模糊集理论引入GIS，以加强GIS对模糊现象建模的能力，因而产生了模糊数据。
In order to enhance the ability of modeling fuzzy phenomena, the fuzzy set theory is introduced into GIS, which produces fuzzy spatial data.
应用推荐