[mkgmap-dev] unpaved roads

Wed Feb 8 07:38:35 GMT 2017

Hi all,

I tried to create a patch for the rules which set mkgmap:unpaved using the wiki and taginfo:
https://taginfo.openstreetmap.org/keys/surface#values

One probem with surface is that we have so many values (taginfo lists 4844 different today),
many of them typos or combinations like "ground;grass" or nonsense like "paved;unpaved"
I guess many of the latter were produced by "connect ways" functions in OSM editors, so not fully intended.

Anyhow, my impression is that it would be better to change the rule so that it checks the known
paved surfaces and assumes that all others mean unpaved.
The current rules are quite old, it was introduced with r1425 and last changed with r1489.

Comments?
Gerd
________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <cdavilam at orangecorreo.es>
Gesendet: Dienstag, 7. Februar 2017 12:39:49
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] unpaved roads

I don't agree with you. I think default style is a generic style, and as
such, it shouldn't do much guess but use the strict meaning of tags.
Gravel, fine_gravel, ice, etc. are strictly unpaved and I would mark
them as such in default style. More specific uses (mtb/race
bicycle/4wd...) require specific maps and thus specific styles.
@Mark: I'm also cyclist and for mtb use your "raining" point of view of
paved/unpaved is important to be considered.

El 07/02/17 a las 11:57, Nuno Pedrosa escribió:
> Hi! In Portugal, Spain and surely a little all around, unpaved gravel
> roads are common, even on urban neighbourhoods.
> These are quite drivable and they will often be the only way to get to
> some places. They are also suitable to all vehicles, even if they will
> get covered in dirt.
> There are also a lot of paths going through sand (forest roads) and
> these will unsuitable to most vehicles (even a lot of 4x4s),
> regardless of their width.
>
> I find that while driving, the real issue will be the road conditions
> and width. Will the unpaved road be wide enough for a car or light
> truck? Will it have deep tracks due to soil erosion? Will the surface
> be solid enough to drive in a regular car?
>
> So, in real world GPS usage, I would like unpaved to mean “narrow,
> earth roads”, while paved would mean any road suitable to all regular
> vehicles.
> Example: due to wind farms being built in a lot of hill ranges, large,
> unpaved roads were built. These are gravel, wide roads, and often are
> a better option to the paved, sinuous mountain roads that go around
> every nook and cranny in the valleys.
>
> So, I think that fine_gravel, salt and ice should still be “paved”.
>
> Nuno Pedrosa.
>
> PS: Sorry to “butt in” the talk. I’m usually silent in this list,
> though I read most of the discussions. Your work is amazing and I find
> that I can add little to what is being discussed, so I try to keep my
> “noise” to a minimum!
>
>
>> On 7 Feb 2017, at 09:40, lig fietser <ligfietser at hotmail.com
>> <mailto:ligfietser at hotmail.com>> wrote:
>>
>> I'd call that semi-paved but Garmin doesn't have such category
>> unfortunately. Since the default style main focus is on motor
>> vehicles I'd suggest to add surfaces like fine_gravel, salt, ice to
>> the unpaved list. And please add soil to it, it seems a quite popular
>> tag.
>>
>> ------------------------------------------------------------------------
>> Gerd wrote
>> This "raining" part is probably what paved/unpaved is about: The
>> surface of a paved road should not change when it's raining
>> and your vehicle will not be covered with dirt when traveling on a
>> paved road while it is raining (at least not from dirt which was part
>> of the surface).
>>
>> Do you agree on that (last sentence)?
>>
>> Gerd

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