Key:surface:material

surface:material=* describes the material of the surface=* of an object. The values of the tag are described on the main page material=*

Usage

The surface of an object describes the general surface such as general texture but doesn't include any other information about the material. Certain surfaces such as surface=asphalt have a consistent material. Others, however, can be made for a variety of materials and conversely, the same material can be used for different surfaces. For example, surface=paving_stones can be made out of material=concrete, brick or any other stone. Conversely, material=granite exists as bare surface=rock but also processed as sett, paving_stones and unhewn_cobblestone.

Comparison with material=*

Altogether, the key is a duplicate of material=* but with an added specifier that the tag describes the surface only. Data consumers should therefore treat both tags as one and the same, possibly giving surface:material=* a higher priority since that tag is less ambiguous than simple material=* which may refer to other objects.

Compare surface:colour=* which has a similar distinction as colour=*.

Possible tagging mistakes

surface_material=*

More details at taginfo

• surface_material=*

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