[mkgmap-dev] type=multipolygon relations

Sun Jan 19 19:53:08 GMT 2014

> Hi WanMil,
>
> WanMil wrote
>> Ahh, that's fine.
>> Unfortunately it shows the big problem of mps: thery are much too
>> complicated (but this is not relevant for mkgmap - we have to support it
>> until they are replaced by another OSM data structure).
>>
>> Does that also mean that we should another check for that?
>
> yes, I did not yet look deeply into the code, but I guess we
> can use this rule to simplify the routine that joins ways?
> Question is: what should happen if a relation doesn't meet the
> criteria? Ignore it completely or ignore elements that are invalid?
>
> Gerd
>

Hi Gerd,

I don't think that the routine that joins ways will become easier. The 
task is still the same (join n ways at point p) and the existing routine 
does not have any error handling (like a backtracking algorithm when a 
join does not lead to a closed polygon).
So an additional warning should be enough from my point of view.

WanMil