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Table 1
Feature-mapping criteria.
| Feature | Mapping criterion | Min. size | Map |
|---|---|---|---|
| Linear features | |||
| Terrace | Terrace margin | 20 m |  |
| Niche | Top of the feature | 20 m |  |
| Ridge | Upper edge | 100 m |  |
| Rim | Upper edge | 100 m |  |
| Fracture | Along the feature | 15 m |  |
| Scarp | Contact with lower plain | 20 m |  |
| Circular features | |||
| Boulder | Enclose the feature | ∅5 m |  |
| Mound | Enclose the feature | ∅5 m |  |
| Crater | Enclose the feature | ∅5 m |  |
| Bright patch | Enclose the feature | ∅2 m |  |
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