It works primarily by receiving GPS satellite data. It uses cellular tower triangulation as supplemental to enhance location information. The iPhone performs these calculations and then presents the GPS coordinates to the GPS location app which is being utilised. It must be noted that cellular tower triangulation is not very accurate. Neither, for that matter, is GPS satellite triangulation unless several satellite signals are received.
David Chittenden, MSc, MRCAA Email: dchitten...@gmail.com Mobile: +64 21 2288 288 Sent from my iPhone On 18/01/2013, at 5:03, "Kramlinger, Keith G., M.D." <kramlinger.ke...@mayo.edu> wrote: > Does this work by GPS satellite data or by triangulating cell phone tower > info? If the former, will GPS work in airplane mode? > > Keith > > -----Original Message----- > From: viphone@googlegroups.com [mailto:viphone@googlegroups.com] On Behalf Of > David Chittenden > Sent: Thursday, January 17, 2013 1:51 AM > To: viphone@googlegroups.com > Subject: Re: Basic Questions on Navigon > > The iPhone has a built-in GPS receiver which works quite well. > > David Chittenden, MSc, MRCAA > Email: dchitten...@gmail.com > Mobile: +64 21 2288 288 > Sent from my iPhone > > On 17/01/2013, at 19:52, "Bill Gallik" <wfgal...@charter.net> wrote: > >> Perhaps there is an URL with the information I'm looking for, but I still >> want to be certain that I have answers to the following questions: >> >> 1) Does this app require an independent GPS receiver? >> >> 2) If so, is there a list of compatible such devices? >> >> 3) Can a user manual and/or user guide be found online? >> >> 4) If so, where? >> >> 5) What is the nature of technical support? >> >> 6) Is there additional cost for technical support if such exists? >> >> 7) Will this app function efficiently on an iPhone 5 with 32 Mb memory? >> >> Thanks >> >> ---------------- >> Holland's Person, Bill >> - "Having an understanding in our relationship does not mean you stand on a >> pedestal giving me orders." >> - Bill Gallik, January, 2013 >> -- >> You received this message because you are subscribed to the "VIPhone" Google >> Group. >> To search the VIPhone public archive, visit >> http://www.mail-archive.com/viphone@googlegroups.com/. >> To post to this group, send email to viphone@googlegroups.com. >> To unsubscribe from this group, send email to >> viphone+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/viphone?hl=en. >> >> > > -- > You received this message because you are subscribed to the "VIPhone" Google > Group. > To search the VIPhone public archive, visit > http://www.mail-archive.com/viphone@googlegroups.com/. > To post to this group, send email to viphone@googlegroups.com. > To unsubscribe from this group, send email to > viphone+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/viphone?hl=en. > > > -- > You received this message because you are subscribed to the "VIPhone" Google > Group. > To search the VIPhone public archive, visit > http://www.mail-archive.com/viphone@googlegroups.com/. > To post to this group, send email to viphone@googlegroups.com. > To unsubscribe from this group, send email to > viphone+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/viphone?hl=en. > > -- You received this message because you are subscribed to the "VIPhone" Google Group. To search the VIPhone public archive, visit http://www.mail-archive.com/viphone@googlegroups.com/. To post to this group, send email to viphone@googlegroups.com. To unsubscribe from this group, send email to viphone+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/viphone?hl=en.
