GPS accuracy

 

I have a Nuvi 2599 and lately the unit shows my car off the road approximately 50 feet to the left of where I actually am.

If I am in a neighborhood it will show me 1 block over and if I am on a highway it shows me as being out in the middle of nothing.

If I power off and then power back on it usually fixes the issue, but a while later (could be a few hours or a few days) I am back off to the left.

I have had this unit for several years with no issue, but this has become really annoying as it will not go away.

Is there a way to recalibrate or reset or anything I can do or that anyone would recommend?

Thanks in advance,

Larry in Virginia

Try a Hard Reset

Have you try to do a hard reset, did you change the GPS location, be sure the rear of the GPS is clear, check also the power cord

I would try...

Driver 38 wrote:

Have you try to do a hard reset, did you change the GPS location, be sure the rear of the GPS is clear, check also the power cord

...the hard reset. That has a tendency to cure a variety of ills.

--
It is impossible to rightly govern a nation without God and the Bible. ----George Washington

gps errors

May not be your problem but.

I had a 1450 start doing that plus started showing straight lines between points when on a route eventually went into data transfer mode and lock up.

Battery was going bad.

--
garry

Try

If a hard reset doesn't fix the issue, try updating the firmware via Garmin express. Even if you are using the current version for your unit, reload it anyway.

I have seen this behavior on an older GPSr which was caused by a corrupted file.

Good info

Good info

Thanks for the replys

I have tried the hard reset, including wiping all data and then reinstalling.

The cord is fine - I actually have it hard wired into the car. There is also nothing blocking the rear of the unit. Not sure the battery could be the issue since I keep it plugged in all the time due to the traffic adapter.

I will report back in a week or so if the hard reset worked.

Again, thanks to everyone who replied.

Larry

Me too

I have had this happen on occasion and have always attributed it to an error in the map. Just my guess.. but there has to be a zone layer in the map that is used for the auto-snap feature.. and at times they are not coincidental. Leaving you driving where the GPS coordinates thinks you are.. but outside of the auto-snap zone.

--
Lives in Edmonton AB A volunteer driver for Drive Happiness.ca and uses a 2689 to find my way.

Mine used to do it

My 1390T used to do it. It would show that I arrived at home when I was still about 150’ or 6 houses away. It did it for about 4 years. Then a couple of years ago after a map update I noticed that it put me at the end of my driveway. Strange, it’s been good since.

Database error vs. coordinate error

jackrabbit000 wrote:

a couple of years ago after a map update I noticed that it put me at the end of my driveway.

Your history sounds like a local error in the supplied maps as regards the position of your address, which got fixed in a map update. The original poster appears to believe that all positions are reported with a systematic offset from the truth, which is quite different.

Regarding your house, I can recount that Garmin used to use a linear approximation between endpoints to estimate street address locations in my neighborhood. This worked very badly, as we are not at all systematic here, unlike many USA urban streets. A few years ago the Garmin map for this area started using specific coordinates for each individual house address. In my case asking to go to my house address went from sending you to a place around the corner over a thousand feet away to well-nigh perfect at that point.

Possibly this happened in your case also, but it does not fit the original poster's description.

--
personal GPS user since 1992

So that's what caused it!

garry1p wrote:

May not be your problem but.

I had a 1450 start doing that plus started showing straight lines between points when on a route eventually went into data transfer mode and lock up.

Battery was going bad.

I also had a 1450 and would occasionally get the "straight line" route like I would if flying--except that I was definitely on the ground!

--
NEOhioGuy - Garmin 2639, MIO Knight Rider

point addressing vs extrapolated addresses.

For a detailed explanation of Garmin's "door-to-door" addressing compared to logical addressing, see Charlie's FAQ: http://www.poi-factory.com/node/42527

--
Alan - Android Auto, DriveLuxe 50LMTHD, Nuvi 3597LMTHD, Oregon 550T, Nuvi 855, Nuvi 755T, Lowrance Endura Sierra, Bosch Nyon

Not Experiencing This Problem

Neither of my two units have experienced this problem.

--
romanviking

Thanks

archae86 wrote:
jackrabbit000 wrote:

a couple of years ago after a map update I noticed that it put me at the end of my driveway.

Your history sounds like a local error in the supplied maps as regards the position of your address, which got fixed in a map update. The original poster appears to believe that all positions are reported with a systematic offset from the truth, which is quite different.

Regarding your house, I can recount that Garmin used to use a linear approximation between endpoints to estimate street address locations in my neighborhood. This worked very badly, as we are not at all systematic here, unlike many USA urban streets. A few years ago the Garmin map for this area started using specific coordinates for each individual house address. In my case asking to go to my house address went from sending you to a place around the corner over a thousand feet away to well-nigh perfect at that point.

Possibly this happened in your case also, but it does not fit the original poster's description.

Thanks for the explanation.