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【多选题】
空间数据库区别于通用数据库的特点是________。
A.
空间数据和属性数据联动管理
B.
实体类型繁多,实体间存在着复杂的空间关系
C.
空间数据是连续的,并且有很强的空间相关性
D.
空间数据的数据量大,应用广泛
E.
空间数据的坐标长度不定,具有变长记录
F.
空间数据库需要大量的空间数据操作和查询
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