The water feature craved out from large granite stone artfully demonstrates the natural process how river goes through land surface for hundreds of years and transforms the land into river valley.

溪水流淌过花岗岩石，巧妙地展示了河水流经陆地数百年的自然过程，并将土地变成河谷。

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Spectral data sources of sandy land included single surface feature and composite surface feature, and their spectral data were measured by different sampling methods.

沙化土地光谱数据源分为单一地物类型级和复合地物类型级两种，野外测量时分别采取不同的采样方法。

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