[Tagging] surface=ground/dirt/earth

Dave Swarthout daveswarthout at gmail.com
Tue Mar 18 05:14:21 UTC 2014


Yes, I agree firmness works better than stiffness for describing a surface.
I still would prefer a term that better characterizes what Fernando said
above: "To me, the idea [of] a firm/soft mixture seems closely related to
"how well maintained" the track/road is, as mixtures that are not so
durable/steady/firm
quickly wear down and look 'poorly maintained'."

A poorly maintained road, or one that is not well engineered, or one
composed of loose, uncompacted materials will be much less durable than one
that has those characteristics. Consequently, I still think durability fits
the bill. I hesitate to bring this up but the discussion about
trafficability tried to rationalize the relationship between a highway's
surface, hardness, composition and smoothness and ran into similar problems
(David Bannon?)

FWIW, borrowing again from Fernando above I would reword the definitions as
so:

grade1: "heavily compacted hardcore"
grade1: [Usually paved. If unpaved then a heavily compacted mixture of
materials (gravel, sand, earth, clay) that provide a fairly smooth, durable
and relatively weather-resistant surface.]
grade2: "unpaved (...) surface of gravel [a hard material] mixed with
varying amount of [soft materials] sand, silt and clay"
grade2: [Unpaved (...) surface of gravel mixed with a varying amount of
other materials and lightly compacted or rolled to provide a good surface.
Less durable or weather resistant than a grade1 track.]
grade3: "even mixture of hard and soft materials"
grade3" [Almost always an unpaved *dirt road*. A mixture of uncompacted
hard and soft materials providing a reasonable surface. Subject to moderate
degradation in bad weather. ]
grade4: "prominently with soil/sand/grass [soft materials], but with some
hard materials"
grade4: [A rougher unpaved dirt road with a mostly soft surface, poorly
maintained and not very durable. Rain and other bad weather degrade this
type of track rapidly.]
grade5: "lacking hard materials"
grade5: [A very rough unpaved track composed of loose, uncompacted, soft
materials often having a surface of grass and dirt, or, in wet weather,
mud. Not very durable — easily eroded.]

Other OSMers have amended this list to include grade6 and even grade7 for
tracks passable by 4WD or ATV only. What about those?



On Tue, Mar 18, 2014 at 8:57 AM, Fernando Trebien <
fernando.trebien at gmail.com> wrote:

> "Firmness" sounds good to me:
> http://www.merriam-webster.com/dictionary/firmness
>
> I know that "soundness" means the same but has some additional
> meanings (http://www.merriam-webster.com/dictionary/soundness),
> "firmness" is more specific.
>
> On Mon, Mar 17, 2014 at 9:09 PM, johnw <johnw at mac.com> wrote:
> >
> >
> >
> > On Mar 18, 2014, at 1:35 AM, Fernando Trebien <
> fernando.trebien at gmail.com>
> > wrote:
> >
> >  Replacing 'stiffness'
> > with something else is absolutely fine with me.
> >
> >
> >
> > What about firmness? soundness?
> >
> >
> > Javbw
> >
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>
>
>
> --
> Fernando Trebien
> +55 (51) 9962-5409
>
> "The speed of computer chips doubles every 18 months." (Moore's law)
> "The speed of software halves every 18 months." (Gates' law)
>
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>



-- 
Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com
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