Nav's new problem

chaodima · 03-31-2007, 05:08 AM

between my nav's map and real time you driveing has 100ft difference.. such likes i was driving my car just past a street but my nav's map showing me i didnt pass the street, the error measurement like 100ft between nav'map and real road, but now i dont know how to fix it, i want to reset my nav and anyone know how to do it??

poiney · 03-31-2007, 11:34 AM

I'm not confident that mine is better than that, but it hasn't bothered me too much -- maybe because there are so many other deficiencies with this design!

LarryK1000 · 04-01-2007, 02:41 PM

Mine is really the same as yours. So, I don't think BMW's nav works any better than this.

I believe mine is off by about 50 feet.

I think what it is is a lag time between the sat telling the system where you are and it updating. You really don't notice the lag unless you are coming up to an intersection. Then, it is REALLY noticeable.

Usually, by the time I am in the middle of my turn, it shows 0 Ft.

But, I know what you mean. My Magellan RoadMate 800 anticipates where you are and tells you BEFORE you get to the intersection. Pretty nice.

Larry in Los Angeles

bimmerFUD · 04-01-2007, 03:31 PM

Quote:

Originally Posted by LarryK1000

My Magellan RoadMate 800 anticipates where you are and tells you BEFORE you get to the intersection.

Same with my Garmin Nuvi 370.

SteveMD · 04-01-2007, 06:42 PM

Hmm. Mine seems to be spot on. Well.. 20' +/- accuracy. I'm no GPS engineer but I always understood the resolution for civilian GPS usage to be about 40-50'.

msimon18 · 04-01-2007, 09:25 PM

Resolution of a GPS today depends on exactly how many of the 12 satellites in the hemisphere you are in your system has locked onto. With 7 or more you should be able to get within a dozen feet with any NEW system.

Remember the distance is to the CENTER of the intersection.

The GPS in my 330cic is just as accurate as my Garmin Nuvi and the one in my wife's Lexus RX330. The one in the RX330 is superior in function with its touch screen and audio notification system but the maps and accuracy are just about equal.

scpage · 04-01-2007, 10:55 PM

WAAS
My NUVI 660 has this capability..very nice.
Wonder if BMWs NAV has this capability.

03-31-2007, 05:08 AM	#1
chaodima Enlisted Member 8 Rep 32 Posts Drives: BMW 335I Join Date: Mar 2007 Location: ROSEMEAD iTrader: (0)	Nav's new problem between my nav's map and real time you driveing has 100ft difference.. such likes i was driving my car just past a street but my nav's map showing me i didnt pass the street, the error measurement like 100ft between nav'map and real road, but now i dont know how to fix it, i want to reset my nav and anyone know how to do it??
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03-31-2007, 11:34 AM	#2
poiney Captain 38 Rep 798 Posts Drives: 328i coupe Join Date: Dec 2006 Location: SJ iTrader: (0)	I'm not confident that mine is better than that, but it hasn't bothered me too much -- maybe because there are so many other deficiencies with this design!
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04-01-2007, 02:41 PM	#3
LarryK1000 Larry from Los Angeles 15 Rep 296 Posts Drives: 2006 330i Join Date: Mar 2006 Location: Los Angeles (SFV) iTrader: (0)	Mine is really the same as yours. So, I don't think BMW's nav works any better than this. I believe mine is off by about 50 feet. I think what it is is a lag time between the sat telling the system where you are and it updating. You really don't notice the lag unless you are coming up to an intersection. Then, it is REALLY noticeable. Usually, by the time I am in the middle of my turn, it shows 0 Ft. But, I know what you mean. My Magellan RoadMate 800 anticipates where you are and tells you BEFORE you get to the intersection. Pretty nice. Larry in Los Angeles
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04-01-2007, 06:42 PM	#5
SteveMD Colonel 201 Rep 2,485 Posts Drives: 2016 F10 535i MSport Join Date: Dec 2005 Location: Raventown! iTrader: (3)	Hmm. Mine seems to be spot on. Well.. 20' +/- accuracy. I'm no GPS engineer but I always understood the resolution for civilian GPS usage to be about 40-50'. __________________ 2006 E90 330i (retired) 2009 E90 335i (retired) 2012 E70 X5 50i M Sport (retired) 2016 F10 535i M Sport
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04-01-2007, 09:25 PM	#6
msimon18 Retired 19 Rep 868 Posts Drives: Z4 s30i Join Date: Mar 2007 Location: The Villages, FL iTrader: (0) Garage List 1965 Isetta 300 [0.00] 2004 1/5 Scale M3 GTR [10.00]	Resolution of a GPS today depends on exactly how many of the 12 satellites in the hemisphere you are in your system has locked onto. With 7 or more you should be able to get within a dozen feet with any NEW system. Remember the distance is to the CENTER of the intersection. The GPS in my 330cic is just as accurate as my Garmin Nuvi and the one in my wife's Lexus RX330. The one in the RX330 is superior in function with its touch screen and audio notification system but the maps and accuracy are just about equal.
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04-01-2007, 10:55 PM	#7
scpage Private First Class 5 Rep 179 Posts Drives: 335i Join Date: Feb 2007 Location: SEUSA iTrader: (0)	WAAS accurate < 3m WAAS My NUVI 660 has this capability..very nice. Wonder if BMWs NAV has this capability.
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