Land type | Features of ground features | Corresponding image |
Bare land | Brown or light yellow, uniform tone or yellow with gray, irregular shape |
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Sand | Gray or dark gray, uniform tone or white in gray, irregular shape |
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Vegetation | Dark green or black with green strips, gray with white, obvious boundary, and the shape is mostly dot or partial circle |
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Collapse pit | The whole is black, the edge part is brownish yellow, and the shape is mostly circular, which is generally closed |
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Crack | Black or light yellow, uniform internal tone, generally linear, streamline, curved strip, linear outline as a whole and obvious boundary |
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