On 2012-01-13 17:06, Carlos Dávila wrote:
El 13/01/12 22:44, Richard Hansen escribió:
Hi all,
Using splitter on the US state extracts from Geofabrik, I am unable to route across state boundaries. On my Oregon 450 I get "route calculation error" after it sits at 80% for a while.
If I combine the extracts before splitting, then routing works.
Is this a known limitation? Would it be feasible to teach splitter how to combine the extracts internally before splitting? If not, what would it take to get mkgmap's routing to work across split extracts?
You need to cut your desired region from a bigger extract, e.g, us-south.osm.pbf and then split it with splitter, or cut it directly with splitter supplying it a pre-made areas.list file. Geofabrik extracts are cut with osmosis and mkgmap needs information of "what is there on the other side" of the extract that is missing after the cut. You can even have some gaps between extracts after merging, so routing is not guaranteed to work with your procedure.
There is enough data to successfully route, otherwise combining them before splitting would not work. So there must be a bug/limitation in splitter or mkgmap that prevents mkgmap from seeing how the two extracts connect. -Richard