[josm-dev] Geometry stuff committed

[dieter jasper]

Andy Robinson (blackadder) schrieb:
> Frederik Ramm wrote:
>   
>> Sent: 18 April 2008 11:53 AM
>> To: dieter jasper
>> Cc: josm-dev at openstreetmap.org
>> Subject: Re: [josm-dev] Geometry stuff committed
>>
>> Hi,
>>
>>     
>>> next features in the que:
>>> * create double carrigeway
>>>       
>> Soemone has suggested to use something like the "extrude" feature for
>> this. First you draw the centre line of the double carriageway, then
>> you grab it using a tool and move it to one side, and this causes
>> both lines to move away from the centre line. Might be worth a try
>> (and ideally suited for making dual c.w.s out ouf normal roads).
>>     
>
> My initial thought was that we don’t want it to work that way because GPX
> tracks don't go down the middle, but then I remembers the TIGER data which
> by far has the most single ways which should be dual, so something that
> takes these single ways and makes them a pair is I'm sure going to be of
> benefit to those in the USA. Not sure its such a big deal elsewhere, we have
> the copy and paste function which is pretty easy to use to duplicate a way.
>
>   

This works only for straight ways. Try it with curved ways., You will 
not get a constant distance between the two generated ways uaing copy 
and paste

regards
dieter