[talk-au] surface=unsealed in 4wd/dirt road tagging

David Bannon dbannon at internode.on.net
Wed Jul 3 08:33:00 UTC 2013

Brett, pretty nicely put, agree unreservedly !

Might add though, while we all see lots to do, OSM is already an 
incredibly useful thing. I am currently travelling from Central Victoria 
to Far North Queensland and relying on OSM pretty much exclusively. I'll 
be hitting some interesting dirt roads and feel confident that I'll be fine!

Where I am heading was  not mapped on either OSM or Google but I could 
quite easily get some approximation in to OSM via Bing and will refine 
it when I am there. How good is that ?


On 03/07/13 18:16, Brett Russell wrote:
> Hi
> As a newcomer to OSM one of the more challenging things is finding the 
> universally accepted tagging and more importantly for me the rendering 
> in both the website map and Garmin maps.
> It is one of the niggles that say with natural=water and with 
> categorizing further to water=lake or water=dam, or water=tarn etc 
> that JOSM brings them up as errors.  I quite like the sub category 
> approach as a render has a choice how far they go down to without 
> having huge statements to cover potentially infinite number of 
> classifications.  More than happy for most uses natural=water is good 
> enough but be great for some to identify natural lakes and lakes that 
> are reservoirs.
> I did read an interesting thread debating the design of maps and given 
> the huge potential number of users I think it not unreasonable to have 
> different rendering for road, 4WD, bushwalkers, kayakers, etc.   It 
> would be great that an approach could be agreed that say sealed versus 
> unsealed (happy with unpaved) could exist and for the 4WD brigade a 
> sublevel of cars, high ground clearance 2WD, and so on could be used.  
> Bit like the rendering of rivers.  For most people river and stream 
> with the option of intermittent is perfectly ok but for a kayaker use 
> to rivers graded by difficulty a sub category and a rendering option 
> would be ideal.
> Heck, even Polatch 2 does not have natural=peak as a preset yet 
> Polatch 1 did.
> Given the non centralized nature of OSM maybe the above is a pipe 
> dream but I for one would be happy to invest the time in creating 
> Garmin and web based tile maps optimized for bushwalking.  I am sure 
> that if a render was a 4WD enthusiast then standard tagging backed up 
> by Garmin maps (plus printable or web based tiles) would be quickly 
> done.  I just find extracting how-to guides to rendering rather 
> cryptic and missing vital steps.  Anyway like anything in OSM if I do 
> not like it then it is up to me to map it or come-up with a solution.  
> For me one of the great sites is the OSM Australia as it cookie cuts 
> some reasonable Garmin maps.  Be great if we could build on that.  As 
> I hold, unless a tag is rendered then it is more academic than practical.
> Just my two point five cents worth.
> Cheers
> Brett Russell
> > Date: Wed, 3 Jul 2013 16:32:34 +1000
> > From: dbannon at internode.on.net
> > To: stevagewp at gmail.com
> > CC: talk-au at openstreetmap.org
> > Subject: Re: [talk-au] surface=unsealed in 4wd/dirt road tagging
> >
> > On 03/07/13 08:52, Steve Bennett wrote:
> > > FYI, the map style I'm working on for cycle touring does make this
> > > distinction: http://emscycletours.site44.com/map2.html#egrt
> > Nice work !
> >
> > > You might be right - but on a technical front, it's no more 
> burdensome
> > > to show all of [unsealed, unpaved, gravel, dirt] as a dashed line
> > > rather than just, say, unpaved. Steve
> > Are you rendering that with Mapnik ? I planned to do something similar
> > to show the "Guardians of the Slippery Map" how cool it was but 
> found it
> > non trivial and have not had time to get back to it.
> >
> > David
> >
> > _______________________________________________
> > Talk-au mailing list
> > Talk-au at openstreetmap.org
> > http://lists.openstreetmap.org/listinfo/talk-au

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