工学 空间数据模型 释 spatial data model 空间数据模型 地理信息系统（GIS）中空间数据组织的概念和方法。反映现实世界中空间实体及其相互之间的联系，是描述GIS空间数据组织和进行空间数据库设计的理论基础。
数据库 数据库理论 释文 spatial data model 空间数据模型
- sound grating
- sound-hard boundary
- sound horizon
- sound image
- sound image control
- sound in film & TV
- sounding
- sounding accuracy evaluation
- sounding balloon
- sounding board
- sounding datum
- sounding device
- sounding electrode
- sounding information processing system
- sounding machine
- sounding of the lower ionosphere
- sounding pole
- sounding rocket
- sounding rod
- soundings
- sounding thinning
- sound insulation
- sound insulation and noise reduction materials
- sound insulation class
- sound insulation coefficient