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
- semi-structured data
- semi-structured decision
- semi-structured interviews
- semi-structured model
- semi-structured observation
- semisubgroup
- semi-submersible drilling platform
- Semi-submersible drilling Platform 981
- semisubmersible drillingplatform up
- semi-submersible platform
- semi-submersible ship
- semisulcospira spp
- semi-superjunction
- semi-supervised clustering
- semi-supervised learning
- semisupplement
- semi-surface
- semi suspended agricultural machinery
- semi-symmetric
- semisymmetric
- semisymmetrical
- semi-symmetric connection
- semi-symmetric graph
- semisymmetric graph
- semi-symmetric quasigroup