[Tagging] surface=ground/dirt/earth

Martin Koppenhoefer dieterdreist at gmail.com
Thu Mar 13 20:32:34 UTC 2014

> Am 13/mar/2014 um 20:57 schrieb Fernando Trebien <fernando.trebien at gmail.com>:
> So:
> - "earth" is a close synonym of "soil" (though it's not exactly the same thing)
> - "ground" could refer to: soil/earth (no vegetation), soil/earth +
> vegetation (say, grass)

IMHO if it's grass then the mapper will most likely have used grass and not ground, even if the broader meaning of the word includes all kind of surface to stand on

> - "dirt" could refer to: soil/earth, clay, sand, arguably gravel (it
> may not be correct but it may be a good idea to clarify this in the
> wiki)

+1, dirt should not include gravel

> So earth, grass, clay, sand, and gravel, are much more specific than
> ground and dirt, both of which are just slightly more specific than
> unpaved.

earth (in the meaning of soil) is not very specific, it is actually a mixture of organic and inorganic substances in different grain sizes, while clay sand and gravel are basically the same material (minerals=not organic) in quite specific and well defined grain sizes

> Could "dirt" involve "mud"?

mud is also not very specific, basically it is soil or inorganic finer grained substances with water

> Could "ground" involve "rock"?

IMHO yes, but if the surface is only rock you'd better use rock as value 


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