[Tagging] lanes tag dispute

Nathan Edgars II neroute2 at gmail.com
Sun Sep 18 18:40:53 BST 2011


On 9/18/2011 1:39 PM, Nathan Edgars II wrote:
> On 9/18/2011 1:38 PM, Anthony wrote:
>> On Sun, Sep 18, 2011 at 1:34 PM, Anthony<osm at inbox.org> wrote:
>>> On Sun, Sep 18, 2011 at 1:21 PM, Nathan Edgars II<neroute2 at gmail.com>
>>> wrote:
>>>> It's simple on a motorway. But, for a simple example on a surface
>>>> road, how
>>>> do you know where the straight lanes go if there are 3 lanes after an
>>>> intersection but 2 before?
>>>
>>> Depends on what data you have. If you have lane width information,
>>> then it's easy to figure this out. If you don't, then you can't
>>> figure this out.
>>
>> Nevermind. Yes you can. If the center of the 3 lane road is to the
>> left of the center of the 2 lane road, then the lane was added on the
>> left. If the center of the 3 lane road is to the right of the center
>> of the 2 lane road, then the lane was added on the right.
>
> Ways are not mapped this way. And even if they were, this would only
> work if there's a median.

Not to mention that the line between the lanes doesn't always go 
straight through the intersection.



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