Some of these maps illustrate the temporal pattern of the subject over a defined period of time while others show finer spatial details through a series of maps drawn in larger scale.
每组地图显示主题在某特定时期内的空间分布情况的变化，或透过一系列高比例的地图显示更多资料细节。
These maps illustrate the temporal pattern of the subject over a defined period of time.
每组地图显示主题在某特定时期内的空间分布情况的变化。
These maps illustrate the temporal pattern of the subject over a defined period of time.
每组地图显示主题在某特定时期内的空间分布情况的变化。
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