[mkgmap-dev] frig-roundabouts doesn't work

Sat Sep 28 13:55:18 BST 2013

Hi WanMil,

it is documented in the Wiki. I plan to rewrite most of it, so yes, you can 
remove it from the branch.

Gerd

WanMil wrote
> Hi Gerd,
> 
> what is the aim of this option?
> Searching for "frig" in the dictionary gives results that have nothing 
> to do with roundabouts... ;-)
> 
> Is this option useful?
> Up to now it is undocumented and could be removed at any time if it 
> makes too much problems.
> 
> WanMil
> 
>> Hi all,
>>
>> while looking at the code again I found out that frig-roundabouts still
>> can be used with --x-frig-roundabouts.
>>
>> I think the option doesn't work very well in the current implementation.
>> Problems:
>> 1) It assumes that a roundabout is round, this is not
>> always true, as it might be elliptic
>> 2) it doesn't add the points
>> to any overlaying line, so I guess that this will look funny.
>> 3) It assumes that a way tagged as roundabout is
>> forms a loop without checking that, but some mappers split
>> roundabouts:
>> http://www.openstreetmap.org/browse/way/32571107
>> 4) it is meant to "stop the gps from reporting the wrong exit"
>> but it is called after short-arc-processing, so it cannot solve the
>> problem when two exits were merged by that processing.
>>
>> I'll try to fix these problems as well as the other problems
>> regarding the short arcs.
>>
>> Gerd
>>
>>
>> GerdP wrote
>>> Hi,
>>>
>>> The option is described in the wiki, and I find a peace of source in the
>>> HighwayHook
>>> that evaluates it, but it doesn't work.
>>>
>>> What is missing?
>>>
>>> Gerd
>>
>>
>>
>>
>>
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