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
- art policy
- art production
- art products
- art proposition
- Art regulations
- Art Research
- Art rights
- Artron Art Index
- arts
- Arts Administration
- Art Sales Index
- arts and carfts of Spring and Autumn Period and Warring States Period
- arts and carfts of Xia,Shang and Western Zhou dynasties
- Arts and Crafts of Ming Dynasty
- arts and crafts of Qin and Han Dynasties
- arts and crafts of Song Dynasty
- arts and crafts of Sui dynasty, Tang dynasty and the Five dynasties
- arts and crafts of Three Kingdoms,Jin,Southern and Northern dynasties
- arts and crafts of Yuan Dynasty
- arts appreciation
- Arts Association
- art scene
- art schema
- art schools
- Arts Circle