GPS issue and what we should do !!!

[private69]

Hi all,
Regarding the lag from the GPS of the HTC diamond and Touch Pro, i called the HTC
custmer support service (French one) and here is what i said:

I tried the GPS with several navigation systems (i said tomtom but they directly
replied me that tomtom is not an official product so i had to say i tried also COPILOT 7
diamond edition) and when i drive i have a 50 meters lag! Even worse, if i use my
old P3600 device it reacts faster, almost instantaneously, while it takes 25 to 30
meters for the diamond to realize i moved."

I also explained them that i made a throughful comparison between the two devices (
P3600 and Diamond) using "HTC GPS TOOLS" and that after two steps the P3600 detects a
movement while it still requires 25 steps until the Diamond or Touch Pro react.

And their answser was he following:
"So far only two people have notified us about the problem, it would require significantly
more people complanining before a HOTFIX patch is released"

So as the support service said, as long as there is enough people notifing them about
the issue we would see a hotfix release. Now it's up to us to take some minutes of our
time and to call them.


For Moderator : I created a new topic even if there's already an existing one so that everyone sees this one

Private69.

@+++

[studz]

I've developed a very strong suspicion of precisely what is causing this apparent lag, and why its effects would be felt more strongly by some and not others.

I think the answer lies in the 'static navigation' algorithm used by the Qualcomm GPSone chip as used in the Diamond. Since acquiring the unit I've always thought its threshold for movement was set too high (many applications and users wouldn't necessarily notice this, but for some (like geocachers) it can be a real pain).

If a journey has lots of start/stop like in city driving, then a navigation app such as Tomtom might begin to struggle to keep pace with actual events as it becomes confused by the interference of the static navigation. I also think this confusion would explain the phenomenon where it takes a similar time lag to register no speed after the vehicle has stopped.

I use my diamond exclusively in a small town in a very rural setting, and my journeys have very little start/stop, and I don't suffer a serious lag problem. So this might be happening for many Diamond owners who have a much greater start/stop component to their GPS use.

Perhaps some feedback on this idea might be of some use to the forum, as if this is the primary reason for lag to develop in the system, it will be very useful in persuading HTC to develop a configurable static navigation solution or hotfix that would be a valuable bonus in many other applications of GPS, and not just apparent lag.