Re: [mkgmap-dev] Inter-tile routing failures - not all our fault?

2009-08-15 Thread Chris Miller
MB I haven't the faintest clue what could be the issue here so until we MB get some hint as to what the problem could be, I'm ignoring it. MB I simply don't have spare time to dream up possible reasons why MB this problem exists. Can't say I blame you, doesn't sound like an easy one to get to the

Re: [mkgmap-dev] Inter-tile routing failures - not all our fault?

2009-08-14 Thread Valentijn Sessink
Mark Burton schreef: There is a particular failure of inter-tile routing that we have seen quite often which is that it fails to find a route when the source and destination are in the same tile and the only (sensible) route is via another tile. (If a sub-optimal route that only uses the

Re: [mkgmap-dev] Inter-tile routing failures - not all our fault?

2009-08-14 Thread Chris Miller
MB There is a particular failure of inter-tile routing that we have MB seen quite often which is that it fails to find a route when the MB source and destination are in the same tile and the only (sensible) MB route is via another tile. (If a sub-optimal route that only uses MB the source tile is

Re: [mkgmap-dev] Inter-tile routing failures - not all our fault?

2009-08-14 Thread Mark Burton
Hi Chris, When I get a chance in the next couple of days, I'll have a play around with some of the official Garmin maps and see if they can be made to exhibit the same problem. If so then the limitation is most likely in the routing algorithm in MapSource and/or on the device. If that's

Re: [mkgmap-dev] Inter-tile routing failures - not all our fault?

2009-08-14 Thread Mark Burton
Using a recent GB tiled map on my eTrex, I have found that it performs differently (better?) to mapsource with regard to the problem of not routing across a boundary and back to the source tile. An example route I tried used a road that snaked across a boundary. Mapsource failed miserably in the

Re: [mkgmap-dev] Inter-tile routing failures - not all our fault?

2009-08-14 Thread Apollinaris Schoell
did some experiments in Mapsource and Garmin maps don't suffer from this problem.found a place where the direction of the route defines which way is chosen. makes perfect sense because right turns are faster and easier than left turns. Mapsource will even choose the longer way across the tile

Re: [mkgmap-dev] Inter-tile routing failures - not all our fault?

2009-08-14 Thread Garvan maew
Apollinaris Schoell wrote: did some experiments in Mapsource and Garmin maps don't suffer from this problem.found a place where the direction of the route defines which way is chosen. makes perfect sense because right turns are faster and easier than left turns. Mapsource will even choose the