[talk-au] 4WD only tags

David Bannon dbannon at internode.on.net
Sun Nov 4 22:10:18 GMT 2012

Thanks Li, I have not put that proposal up yet, waiting on a response
to a related matter. Soon.

And when I do, I'll not be wanting just your vote, it will be your
input I will really need !

Maybe I should put a draft up on my personal page while we wait ?


----- Original Message -----
From: "Li Xia" 
To:"David Bannon" 
Cc:"OSM Australian Talk List" 
Sent:Sun, 4 Nov 2012 20:37:52 +1100
Subject:Re: 4WD only tags

 Hi David, although my opinion is that most render's try to simplify
the the stylesheet so the map for ease of comprehension and would not
make use of these additional attributes, I see your point and agree
that it's useful data to have. Since my company focuses on 4WD maps
and navigation, we will certainly take full advantage of this.
 BTW, do you have the link to the proposal page? Will go and cast a
  On 04/11/2012, at 2:41 PM, David Bannon wrote: 
 Li, I beg to differ. While I agree that grading of a 4x4 track is
subjective, so is much of the other data in the OSM database. Must be
that way.

The real issue is how important the data is. As I have mentioned, I am
concerned that maps are being rendered that ignore this data. Routing
engines are potentially sending people down roads that they, and their
vehicles are ill suited to. Bad things will definitely happen.

The routing people are saying "but these tags don't even show on the
OSM maps, why should we worry ?". 

And as to subjective, while there will always be borderline cases, I
don't think it would be too hard to divide tracks up into -

* 4x4 recommended - you will might be OK in a conventional car or
(better still) an SUV but you have been warned.

* 4x4 required - you really need a stock 4x4, a real one with (eg) low

* 4x4 extreme - this is for the death or glory boys, they need
experience and modified vehicles. This is a recent addition !

I am pretty sure that if you and I spent a couple of weeks having some
driving fun, we'd agree on the vast majority of the tracks we graded.


----- Original Message -----
 From: "Li Xia"  
To:"David Bannon" 
Cc:"OSM Australian Talk List" 
Sent:Sun, 4 Nov 2012 13:08:22 +1100
Subject:4WD only tags

 Hi David, just my 2 cents on 4WD_only tags.

 By adding a 4x4 recommended tag will add to the complexity because
it's kind of subjective as to which roads/tracks are traversable in a
2WD vehicle, therefor adding another option for this key will further
complicate the issue. 


[1] mailto:lisxia1982 at gmail.com
[2] mailto:dbannon at internode.on.net
[3] mailto:talk-au at openstreetmap.org

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