Turf (OpenData)

A surface layer of earth covered by a dense growth of grass. The earthen surface is held together by a matted layer of grass roots. It is spatially abstracted to a Area Feature. Entity Type: Thing.由茂密草丛覆盖的地表表层土壤。该地表土层由盘结交错的草根层固结为整体。其在空间维度上被抽象为面要素（Area Feature）。实体类型：事物（Thing）。