Ideally, a variety of smaller scale spatial data can be automatically derived from a large scale spatial database. That requires model generalization technology in the GIS environment.
理想的情况是能够从大比例尺空间数据库自动衍生各种小比例尺空间数据，即实施GIS环境下的模型综合。
Ideally, a variety of smaller scale spatial data can be automatically derived from a large scale spatial database. That requires model generalization technology in the GIS environment.
理想的情况是能够从大比例尺空间数据库自动衍生各种小比例尺空间数据，即实施GIS环境下的模型综合。
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