Hi Gerd, I’m not sure about that, but it makes sense.
Thank you, Nuno Pedrosa. > On 8 Feb 2017, at 12:11, Gerd Petermann <gpetermann_muenc...@hotmail.com> > wrote: > > Hu Nuna, > > If I got that right the Garmin algo uses unpaved roads if the target is only > reachable via unpaved > roads, at least if the target itself is an unpaved road. > > Gerd > ________________________________________ > Von: mkgmap-dev <mkgmap-dev-boun...@lists.mkgmap.org.uk> im Auftrag von Nuno > Pedrosa <nuno.f.pedr...@gmail.com> > Gesendet: Mittwoch, 8. Februar 2017 12:27:11 > An: Development list for mkgmap > Betreff: Re: [mkgmap-dev] unpaved roads > > Ok. But that will mean that in a generic map, a lot of places will be > unroutable if the GPS is avoiding all unpaved roads. To reach them, the user > will need to allow unpaved roads in the route. This will mean routing through > sand roads and gravel roads alike. > It would be great if the GPS could handle semi-paved roads, as was mentioned, > but it can't. > > In a generic map, what will be most important? To reach the destination, or > to avoid getting dirt in the car? > In Cadiz, Finca Las Lomas, s/n, 11179 Vejer de la Frontera, Cádiz, Spain, > would be mostly unreachable if avoiding gravel roads. > https://www.google.pt/maps/place/Escuelas+Profesionales+de+la+Sagrada+Familia+Nuestra+Señora+del+Buen+Consejo+de+las+Lomas/@36.2938403,-5.8821947,17z/data=!3m1!4b1!4m5!3m4!1s0xd0c5074acf746b9:0x32a4ea0ba5f0c3d!8m2!3d36.293836!4d-5.880006<https://www.google.pt/maps/place/Escuelas+Profesionales+de+la+Sagrada+Familia+Nuestra+Se%C3%B1ora+del+Buen+Consejo+de+las+Lomas/@36.2938403,-5.8821947,17z/data=!3m1!4b1!4m5!3m4!1s0xd0c5074acf746b9:0x32a4ea0ba5f0c3d!8m2!3d36.293836!4d-5.880006> > There are lots of places like this. > > A side-thought: paved roads aren’t always the best option for a given region. > They are more expensive to build and when they degrade, they get “hard > holes”(*) and fixing them up will usually create bumps in every hole. If the > traffic is low, gravel roads will probably be a better option and better yet > if rain is uncommon, as is the case in southern Europe. > > Nuno Pedrosa > > (*) by “hard holes”, I mean pot-holes where the edges are very steep and the > wheels will crash into it. Gravel roads tend to create pot-holes with soft > edges, a lot easier to drive over. > > > > On 7 Feb 2017, at 11:39, Carlos Dávila > <cdavi...@orangecorreo.es<mailto:cdavi...@orangecorreo.es>> wrote: > > 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 > <ligfiet...@hotmail.com<mailto:ligfiet...@hotmail.com> > <mailto:ligfiet...@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 > > _______________________________________________ > mkgmap-dev mailing list > mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk> > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev > > _______________________________________________ > mkgmap-dev mailing list > mkgmap-dev@lists.mkgmap.org.uk > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
