You need to describe connections to geographicalpoints, to key times and dates, to policies, and to business rules.
您需要描述与地理位置、关键的时间和日期、策略、业务规则的联系。
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In short, vector data take the simplest topological entities — points, lines, and polygons — and anchor them within a 2-d Cartesian coordinate system to describe geographical features.