[mkgmap-dev] How to split polygons into boundary relations with common ways?

Fri Jan 27 07:28:57 GMT 2012

On Tue, Jan 24, 2012 at 02:27:24PM -0800, Apollinaris Schoell wrote:
>>Right, ogr2osm should be one of them. I guess I will have to go back 
>>from osm to shape format and then try my luck with these converters.

osm2shp was good enough for my needs. I liked the simple configuration 
by editing some C functions. Then, ogr2osm processed the shape file.

>>Do you know if there is any shape file converter that would merge 
>>nearby nodes to a single OSM node id? In this data set, adjacent areas 
>>sometimes have nodes in almost the same position. This should be a 
>>problem in the original dataset and not a coordinate transformation 
>>artefact, because a transformation could map multiple points to one 
>>point, but not vice versa.
>
>never found any good solution for merging points or simplify except Josm

I played with JOSM Validator. It did detect some (but not all) problems 
when I deleted the boundary relations and set highway=service on all 
lines.

There might be some solution outside the OSM domain. The thread starter 
is the guy who converted the data set that I am processing:

http://thread.gmane.org/gmane.comp.gis.jump.devel/10457

Hopefully, this solution will help the import of other suburb 
boundaries. I am testing with the suburbs of my home town only.

Best regards,

	Marko