Oi Fernando em qual lista está sendo debatido isto?
tracktype é interessante, mas eu julgava que seria somente para highway=track como o nome sugere. Além disto requer uma vistoria para realmente saber em qual categoria encaixar. No meu entender o ideal é agrupar tudo que encaixa em unpaved (dirt,grass,sand,round etc) e fazer a renderização diferenciada. Agora, se adicionar tracktype resolver a renderização diferenciada eu topo passar a usar como os australianos propõem. abraço Gerald On 31 December 2013 14:10, Fernando Trebien <[email protected]>wrote: > Hello everyone, > > I've been interested in proposing a change to Carto's style (Mapnik's main > style) to allow visual identification of unpaved roads for any kind of > road, much like the Humanitarian style does, which bases this decision on > values of the surface tag. The Brazilian community has shown interest on > this many times, since lack of this feature causes unaware users to > classify roads incorrectly. David Bannon proposes (below) that we use the > tracktype tag for that instead, but I've never seen it being used for > anything besides roads with highway=track (therefore, not a very common > practice it seems). Do you think we should encourage its use in conjunction > with unclassified, tertiary, secondary and primary highways? > > It seems to me that surface=compacted is quite similar in meaning to > tracktype=grade1 (whereas surface=sand, surface=dirt, and others, could be > equated with other grades but rarely with grade1, particularly because the > "compacted" value exists) and so both tags could be used for the same > rendering purpose. Do you agree? > > I've seen people from different countries requesting different things on > this topic: some would consider even a sett street "unpaved" (therefore, > requiring special rendering), but it seems that a "compacted unpaved" road > is the limit with which few would disagree. Finding the right universal > threshold (if there is only one) is still pretty much debatable, so > opinions are appreciated. > > ---------- Forwarded message ---------- > From: davidbannon <[email protected]> > Date: Tue, Dec 31, 2013 at 4:02 AM > Subject: Re: [openstreetmap-carto] Render paved/unpaved (#110) > To: gravitystorm/openstreetmap-carto < > [email protected]> > Cc: ftrebien <[email protected]> > > > I am not sure the tag surface= is the right one here. It has a lot of > possible values, and a lot of them in use. We'd need a look up table to > decide what to do. Better, in my humble opinion to use the tracktype= tag. > This tag is intended to show what state the road is likely to be in and > thats the information a user really needs. Further, this tag is very widely > used. > > The Australian Tagging Guidelines on OSM discusses this ( > http://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines#Unsealed_and_4wd_Roads_.28Dirt.2C_Gravel.2C_Formed.2C_etc.29) > and believes that any road with tracktype= asserted needs to be shown so > people are aware its not a sealed road. > > Please remember that highway= type tags should show what a road is is > intended for, further information is needed if the surface of that road is > not what might be expected ! This is particularly important in places like > the Australian Outback where long distances are involved. Many people have > died as a result of them underestimating their ability to use a particular > road. I don't want to see OSM mentioned in a coroners report. > > David > > — > Reply to this email directly or view it on > GitHub<https://github.com/gravitystorm/openstreetmap-carto/issues/110#issuecomment-31385094> > . > > > > -- > 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) > > _______________________________________________ > Talk-br mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/talk-br > > -- Dr. Gerald Weber [email protected] Personal website <https://sites.google.com/site/geraldweberufmg/> Departamento de Física/Universidade Federal de Minas Gerais Department of Physics/Federal University of Minas Gerais Campus da Pampulha Av. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil mobile: +55-(0)31-96462277 (mudou/changed 02/07/2013)
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