[mkgmap-dev] [PATCH] --ignore-builtin-relations

Sat Apr 16 15:26:08 BST 2011


On 16.04.2011 16:23, Torsten Leistikow wrote:
> Felix Hartmann schrieb am 16.04.2011 16:13:
>>    I don't understand for whom this option is usable. If I use a
>> "relations" file, then I assume I may not use this option (else
>> relations won't be processed). And also one will be missing stuff like
>> boundaries and maybe some forests
> My understanding is, that right now the multipolygon-processing is performed by
> mkgmap even when the map layer shall contains no polygons at all. So this patch
> might speed up processing for such map layers, e.g. contour lines, hiking routes
> overlay, POI overlays.
>
>
okay, that should be clearer in the description. But hiking routes are 
often relations,  or superrelations. Would it be wise then to use that 
option?
For the other usage cases I see the advantage (but I don't think it will 
help at all with contour lines, as in how can there be a speedup if no 
relation data is present in the data anyhow).