muncheno wrote:Carz wrote:Anyone else using iPhone 3GS with PPG M7.1 and 101104C facing routing issues?
I briefly ran a simulated route from Hougang St 91 Blk 971A MSCP to Beach Road Golden Mile on my wife's iPhone 3GS to consider if I should buy iPhone 4. However, straight away from the start of the route, voice kept prompting left turns throughout a series of right turns even though the route is showing right turns correctly. Then when it finally made its way onto Yio Chu Kang road, I was expecting the route to turn right towards AMK Ave 3 CTE but instead, the route continues along YCK road towards Serangoon Interchange. It seems even though routing is set to fastest route, it is still taking the smaller roads instead of expressway like what my GMXT/GMPC would do. Then all of a sudden, the maps starts jumping around (can't remember where but I think when the route joins the end of Seragoon viaduct near the end of Aljunied Road Junction. The next thing I knew, the route is making it's way back to my starting point. I tried the same route a few times but each time, the maps will jump around along the route and then makes it way to my starting point instead of the end destination. I will try more routes to see if the same issue persist but in the meantime I would like to know if other is having the same issues or not. I've renamed the filenames as advised a few post back by the way.
My wife Iphone 4 is with M7.1 too, but no issue on the routing and voice. We didn't use it for long, just about 10min drive around Ipoh and we didn't find anything wrong with it.
On the part you mentioned the maps start jumping around, does it have to do with a GPS receiver is weak? I have seen this problem on GPS unit due to receiver is weak and only able to lock on 2 or 3 satelite instead of 4.
Just my 2-cents.
Thanks for sharing your feedback. Really appreciate having the opportunity to make a comparision.
For my case, it can't be due to weak GPS signals as I was testing it in simulation, not live. Till I get more opportunity to do live tests with her iPhone but I don't think it'll make a difference. In fact, it might be even worst as it'll then be subjected to weak signals as you said. I'm not able to do more tests and comparision with previous and current map 'cos switching maps will always default my current location to KL. Anyone knows how can I force current location to any starting point while inside the house with no signals? Garmin allows that easily but not PPG. I have to stick her iPhone outside the window to update current location if the last acquired signals was not near our home when we last used it (only tested it live once with previous maps before). I only managed to acquire signals sticking it out of our house window once with iPhone unlike with my HD2 which get signals much easily. Even if I managed to get enough signals to update my current position, switching maps will again default to KL, making tests difficult.
Using HD2 with current PPG maps, routing is slightly better as it takes the expressway instead of smaller roads with the iPhone on the same tested start/end points. However, the voice prompt inaccuracy still prevails. It has to do with PPG being unnecessary courteous and wordy with its prompts such that if there's a series of short turns, the voice prompts will still be queueing up after the turns have already passed. The other thing I noticed with PPG on both HD2 is that it directed me to make a right turn into Hougang Point taxi stand against traffic instead of a right turn at the traffic junction. It seems it sees it a slip road but that is not possible 'cos existing the taxi stand (by right is the entrance of taxi stand) will continue on the opposite direction as there is a divider on the road. It's not a two-way direction so no way to cut across it but the route didn't show that but instead show that it could do just that. Continuing on to AMK3 along the French school, the route made an unneccesary left turn into a parallel slip road only to exit and join the main road again. This slip road is a long parallel road to the intended route much like a bus stop. It's not shorter by any means so not sure why it did that only to exit again. I also recall with iPhone though I can't remember exactly where, coloured route could be showing an illegal 90 degree left turn instead of using the slip road before it.
I know the maps is free and not without errors and mappers are working very hard improve it all the time. I'm just not sure if some of the errors I encoutered are mapping errors or PPG limitations/bugs to be reported in more details accordingly to contribute in return. It'll help if there's a way to quickly set starting destination for more simulation tests before taking the plunge with iPhone 4 for myself.