Thanks gpspassion, happy to participate. I really don't know if this application is a hyped up Google Maps or something different; I like Google Maps on the iPhone - good for general navigation, especially when you're walking - but was hoping for more features like TTS etc. I think that it will take some time for the iPhone to have more usable GPS functions and am interested in what this application can do i.e. does it go beyond Google Maps. If a Canadian version were available, I would purchase it just to see what it can do.
Hopefully some of the West Coasters can let us know what they think.
No the chip is the Globallocate Hammerhead v2 and it's perfectly capable of outputting a NMEA stream, it comes down to the software architecture or at least the way Apple have opened it so far via the SDK. It sure looks like Google Maps is using a constant GPS Data stream.
Is it again an issue of power consumption and having to run processes all the time in order to log this data stream?
I suspect that this has to do with the fact that the iPhone 3G does not yet support background processes, thus forcing all applications to run in the foreground. What would make sense to me in the future is some form of OS background process - accessible through the iPhone SDK - that would allow applications to read NMEA sentences and respond in real time. Background processing would also allow an application to respond to upcoming map intersections etc. that facilitate TBT.
I've been using MotionX-GPS on my hikes lately and I'm very happy with it. It logs data every three seconds and the tracks and elevation profiles it creates have been excellent so far. It's hard to believe it's only $2.99.
Yes, it's an excellent app, does the job and it has a very elaborate yet functional UI. One thing I got stuck with though the other day is finding an easy way to review the pictures I had taken during my outing.
Have a look at the GPSies.com iPhone application at http://iphone.gpsies.com. It is a simple but free logger for the iPhone with nice UI (my view) and good coverage for the basic GPS logging use cases.