Spatial data is the abstract of geographicalentity in the real world.
空间数据是对现实世界地理实体的抽象。
2
As a special district, the town is a geographical, economic, social and cultural entity and a kind of synthesis of human and natural elements.
城镇作为特殊的地域，是地理的、经济的、社会的、文化的区域实体，是各种人文要素和自然要素的综合体。
3
A geo-spatial entity which can be organized from geometric data, symbol data, entity data, attribute data is regarded as an object to the object oriented geographical information model.