[mkgmap-dev] [PATCH v7] - alpha patch to support road find by name

Fri Mar 20 13:37:00 GMT 2009

>> I have tought a little about merging roads at import osm stage and found 
>> some problems:
>>
>> - The roads in the osm data are often splitted because of some reason, 
>> e.g. some segments of it has lower max speeds. So the merging has to 
>> take place AFTER the routing information has been extracted.
>>
>> - When is it allowed to merge two segments? At least the name and type 
>> has to be the same.
>>     
>
> From the point of view of finding roads with a given name, the type is
> irrelevant, surely?
>   
Yes, you're right. In this situation the type shold not matter.
> Actually, you don't need to "join" the roads at all to limit the number
> of hits when searching for a street name.
 From my point of view I would have tried to merge the segments at an 
early stage, so that all further tasks can work with the cleaned data. 
But the more I think about it, it will most probably not work.

Merging has to take place place after extraction of routing information. 
(see above)  But before routing extraction the ways gets splitted to not 
exceed some size limits. If merging takes place afterwards, then the 
ways could get to long again.

At the moment I've no idea where it would be a usefull place for merging 
to take place.
With the words of Mark: More thinking required....