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
- The Memorial Hall of Qiu Shaoyun in TongLiang
- The Memorial Museum of 1911 Revolution
- The Memorial Museum of Eighth Route Army Xi'an Office
- The Memorial Museum of Generalissimo Sun Yat-sen's Mansion
- The Memorial Museum of the 129th Division of Eighth Route Army
- The Memorial to Zhou Enlai and Deng Yingchao
- the Memory of World Program
- theme music
- the mental health of children
- the mental health of middle age
- the mental health of old age
- the mental health of youth
- theme of drama
- theme park
- theme plaster
- theme post office
- theme publishing
- The Merchant of Venice
- The Merck Veterinary Manual，MVM
- the mercury clock of the Libros del Saber
- theme reading room
- The Meridian Encyclopedia of Zhou Surname
- The Meridian of War
- The mermaid
- The Merry Widow