Road Class 
•Freeway, National Road, Provincial Road, County Road, Town Road and Village Road.
•Urban Expressway, Urban Main Road, Urban Secondary Road, Urban Ordinary Road, Small Road and Pedestrian Road.
POI Category
• POI is divided into 10 categories, 44 divisions and 137 subdivisions.
• It can be further subdivided. For example, business hotel can be further subdivided into Motel 268, Jinjiang Inn, Home Inn, Green Tree Inn Chain and Xinyu Inns, etc.

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