SurfaceTypeValue
CodeList:SurfaceTypeValue
State of a surface in the context of the origin of the surface and resistance to environmental elements.
Made Sealed
A constructed surface, commonly mineral based, that consists of a solid material that is bonded (i.e. is not loose), such as asphalt or concrete (Figure 3)
Made Unknown
A constructed surface, commonly mineral based, that may be bonded or loose. This value is used where the revision method employed does not allow it to be differentiated into ‘Made Sealed’ or ‘Made Unsealed’.
Made Unsealed
A constructed surface, commonly mineral based, that consists of an un- bonded surface (i.e. the material is loose), such as gravel (including self- binding gravel), cinder or hoggin. Also used to describe surfaces that are bonded but which have been employed as a mesh / grid or similar form to allow vegetation to grow and water to drain through the surface (Figure 4).
Unmade
A surface that has not been constructed but has evolved through use by pedestrians, cyclists, horses being ridden, or motorised vehicles, and where the use has removed or minimised the natural vegetation and fully or partly exposed the underlying mineral surface and / or mud.
As a general note, it can be problematic to precisely differentiate between surface types. For example, the difference between an unsealed road and a track is open to interpretation. The images in the three following figures illustrate typical examples of different surface types.
Made sealed surface – examples
Made unsealed surface – examples
Unmade surface – examples
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