Unless it's the passenger doing that it's entirely impractical for someone driving to manage all of that. That's where GPS receivers are useful. A driver interacts directly with the information displayed. You're asking for a situation far worse than a driver talking on a cell phone. You're asking for a driver to concentrate on small print on a screen, 'pinch' to enlarge the map (last I checked that requires two hands) and then determine a route on the fly. About this time the car will have driven through the front of a Starbucks.
The only practical way for your method to work is to pull over, determine your location and then orient yourself against the displayed map and then reorient the map to your location. There's nothing you said that couldn't be done more efficiently with a paper map. You don't have to 'pinch' a paper map to zoom into a location.
What exactly would you do with Google Map's automatic routing system if it doesn't actually know where you are? You're sitting at the corner of Main and Chestnut but the map seems to think you're on a highway 2/3 of a mile away. All of its directions would be completely incorrect for your vantage point. You're right back to being better off with a real map. There's no flicking, scrolling, zooming or pinching.
If if this was a passenger doing it then that pretty much alleviates the true usefulness of the product. You could have just handed the person a map. After all, if you're moving and the passenger is pinching, zooming, scrolling and flicking then the EDGE connection is going to have to be able to keep up with the map display changes. Have you actually tried scrolling arround Maps and watching the refresh? It takes a while. Not particularly useful unless the application is predicting where the vehicle is going to be next and that won't work since the applet thinks you're somewhere else than you actually are.
OH MY God....Would you please read the whole conversation...I am TOTALY against any digital item being used while driving...to include programing a friggin GPS. I have been nothing but consistant on this if you would read all of my posts.
Number two...I NEVER said that the iPhone was the only way to navigate, I have mentioned in previous posts that I prefer MAPs and a Compass. My statement was that the iPhone and Google Maps is still a useful tool and how it can be utilized, my lord...don't take things so friggin personal.
If you read your google map and look at those little letters...they actually spell out street names...if you have street names and you know that you are somewhere with in 3300 feet of any given location then by simple elimination you can find that dang street that you are "PARKED" on and get back on track.
Wow...I will insure to never piss on your parade again. Sorry for being so insulting to your lack of intelligence!