[Talk-br] Tags useful for rendering of roads in poor conditions

[Gerald Weber]

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 <fernando.trebien em gmail.com>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 <notifications em github.com>
> Date: Tue, Dec 31, 2013 at 4:02 AM
> Subject: Re: [openstreetmap-carto] Render paved/unpaved (#110)
> To: gravitystorm/openstreetmap-carto <
> openstreetmap-carto em noreply.github.com>
> Cc: ftrebien <fernando.trebien em gmail.com>
>
>
> 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
> Talk-br em openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-br
>
>


-- 

Dr. Gerald Weber

gweberbh em gmail.com

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)
-------------- Próxima Parte ----------
Um anexo em HTML foi limpo...
URL: <http://lists.openstreetmap.org/pipermail/talk-br/attachments/20131231/800b52e3/attachment.html>