Hi Burnie:
REALLY interesting information, thanks for the background.
My guess (strictly a guess) is that Sensis doesn't have sufficient "homework" done on the rural roads to include them in a cartography product that supports autorouting. In other words, they have the vectors digitized for the rural roads, but they don't have ANY attributes at all for them, such as surface characteristics, directional characteristics, turn restrictions at intersections, etc.
I had a look at the page on the Garmin website that describes the MG Australia product (
MetroGuide Australia) and was surprised to see that it doesn't support autoroute creation even on a PC. All the other MG products (Europe, North America, Canada) will support autoroute creation on the PC. The new Canada MG just produced by DTMI Spatial will even autoroute on a suitable GPSR (GPS V, SP III, SP 26xxx, and certain aviation and marine units).
Will be interesting to see what develops with the Australia cartography. You folks have the same population there as we do in Canada - no reason why you shouldn't have full map coverage, with autorouting, like USA, Canada, and Europe.
If I owned Sensis stock, I might be tempted to sell it...
PanEuropean