I'm seeing very similar behaviour to this. Travelling North/South or South/North across a boundary seems to work fine but East/West or West/East fails. Picking North/South source/destinations I can route a considerable distance but there is a point where I can route to a town but not to the next town 5 miles further away. I have heard of a 13000 point limit on Garmin devices so this is possibly what I'm seeing here as the destinations are all on the same tile. From where I am then routing into Scotland is North/South boundary and Wales is on the same tile so this all works fine If I use the individual England, Scotland, Wales files rather than the combined great_britain and combine then with mkgmap then routing into Wales (East/West junction so would fail anyway) or Scotland (North/South) simply fails. Is this possibly related to the way in which the individual country files are created from the raw data. I don't have to run splitter against Scotland or Wales but do against England When it fails my 605 simply says "Route calculation error" and returns me to a map of my starting location Paul Steve Ratcliffe wrote:
On Thu, Feb 19, 2009 at 12:56:24AM +0000, Mark Burton wrote:
I appears to work fairly well in mapsource although I have found that for long routes it gives up and draws a straight line even though it can route OK if you add some intervening waypoints. So, more work required but it would be great to get some feedback as to how it's currently performing especially on real gps units.
I'm finding that crossing a vertical edge of a tile almost never works, but that crossing a horizontal one is fine.
So even the simplest route on the same road from west to east takes a long time to calculate and then ends up as a straight line or a very weird route.
There is one vertical boundary that seems OK. It has positive longitude, whereas all the others on my mapset have negative longitudes. So that may be something to do with it or just a coincidence.
..Steve _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev