[mkgmap-dev] [PATCH v2] Fix so that all polygons are really closed

Sun Feb 27 16:09:03 GMT 2011

Am 27.02.2011 16:58, schrieb Torsten Leistikow:
> WanMil schrieb am 27.02.2011 16:53:
>> Your example will result in
>> 1. line with 0x01
>> 2. a) nothing more if node1 or node2 is within the tiles bounding box
>>      b) a polygon 0x02 if node1 and node2 is outside or on the tiles
>> bounding box.
> Ok, I will try out r1865 when it is availbale as a download.
>
> But in my opinion 2.b) is a fault: If the polygon is not closed in the OSM data,
> it shouldn't be closed by mkgmap, no matter whether the start and end nodes are
> inside or outside the bounding box
But correct polygons gets divided into two or more unclosed polygons by 
splitting the hole osm-datafile into smaller tiles. These polygons 
should be closed by mkgmap.

Maybe it could be managed if polygons gets only closed, then there isn't 
only a rule in polygons-file.

Example:

man_made=pier in polygons and lines-file -> no closing
man_made=pier & area=yes in polygons-file and man_made=pier & area!=* in 
lines-file -> close, if nodes are outside
man_made=pier only in polygons-file -> close, if nodes are outside

Henning