Mixed Up Garmin?????

 

I am test driving my 3790 LMT very nice with the 3d stuff, but the maps seem to have issues telling me to turn Right when a place is clearly on the left side of the road or to turn Left when a place is clearly on the right side of the road.

I am wondering if someone had an off day when they put in the base POI's into the maps. The general area is ok, but so far in Chatanooga TN, it is having problems. Maybe I have better luck when I head west with it.

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Garmin 3597 LMTHD

More info

Would appreciate your giving a few examples. Maybe others could run some simulations to help understand what is going on.

If you have never tried "simulations", read
http://www.poi-factory.com/node/31482

Did a previous GPS do the same thing?

An example

I am staying at a hotel in Down Town chattanooga, while driving down the street to my hotel to my hotel the 3790 LMT says Arriving at Marriott on right when the building is clearly on the left side of the street across 2 lanes of traffic.

The same garmin 3790 LMT unit also tells me Arriving at walmart on Right when the Walmart is accross the highway on the LEFT side of the road.

All locations are in Chattanooga, TN so far.

It was also off on a restaurant (I can't remember which one) but same issue tells you its coming up on Left and its on the right.

All I can figure is someone had an off day when they were aligning the POI's in the map software.

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Garmin 3597 LMTHD

Let's check it

Post an address we can check it with. A start and stop for a simulation.

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nüvi 3790T | Those who make peaceful revolution impossible, will make violent revolution inevitable ~ JFK

Every GPS

TMan65 wrote:

I am test driving my 3790 LMT very nice with the 3d stuff, but the maps seem to have issues telling me to turn Right when a place is clearly on the left side of the road or to turn Left when a place is clearly on the right side of the road.

I am wondering if someone had an off day when they put in the base POI's into the maps. The general area is ok, but so far in Chatanooga TN, it is having problems. Maybe I have better luck when I head west with it.

I've had that happen with every GPS I've ever owned, I just don't worry about it. The way I look at it, if the GPS can take me to within a couple of hundred feet of a Walmart or any other place that's 500 miles away no matter what side of the road it's on if I can't spot it from there I have no business traveling in the first place.

I have no idea how the mapping people find addresses but if it's anything like the websites or software I use it might put me a couple of hundred feet off on any given address. I know every program or web site I've ever used puts my house about two houses east of where it's actually at because they think my block numbers up to 1972 when it really only goes to 1958. I had a surveyor tell me on any given street the mapping people will take two known coordinates and figure all of the addresses in between mathematically. He went on to say where the problem comes in is the equation also treats every lot as being the same size. The bottom line is I wouldn't blame the GPS I would put the blame with the mapping people.

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Anytime you have a 50-50 chance of getting something right, there's a 90% probability you'll get it wrong.

Well, I'll be darned

TMan65 wrote:

I am staying at a hotel in Down Town chattanooga, while driving down the street to my hotel to my hotel the 3790 LMT says Arriving at Marriott on right when the building is clearly on the left side of the street across 2 lanes of traffic.

The same garmin 3790 LMT unit also tells me Arriving at walmart on Right when the Walmart is accross the highway on the LEFT side of the road.

@TMan65,
I wonder if this is a function of Navteq maps.

let's do an exercise. We will assume that you are using the built in POIs.

Go to www.nacteq.com and enter this address "2 Carter Plaza 37402". Now zoom in until you see that the pointer is on the north side of 11th Street and east of Carter Street.

Now go to www.googlemaps.com and enter "2 Carter Plaza 37402". Now zoom in until you see that the pointer is the front entrance to the Marriott.

Now go back to Navteq and enter "501 signal Mountain Boulevard Chattanooga TN". Now zoom in till you see that the pointer is on the east side of Signal Mtn Blvd (just off the roadway). Drag the map to the right and you will see the Walmart (huge parking lot).

Now go to www.googlemaps.com and enter "501 signal Mountain Boulevard Chattanooga TN". Now zoom in till you see that the pointer is the middle of Signal Mtn Blvd. This is still not where the pointer should be which, in my opinion, should be 100 feet or so to the northwest.

I would say your GPS is responding correctly to the coordinates it has from Navteq (which is the source Garmin uses). It is the coordinates that are wrong.

Now, let's assume that you have downloaded the latest Walmart POI file from poi-factory. The Walmart coordinates are at -85.331257, 35.089941 which are WAY WAY off. It would have the Walmart on the left side of the street but would be not at the right place. I think the coordinates ought to be at -85.330827, 35.092366.

If we look at the Marriott file from poi-factory we find the coordinates are at -85.27525, -85.27525 which are no where close to the Marriott. In fact, there are across a river. They ought to be -85.312625, 35.043729.

Boyce Thompson SW Arbortetum

Near Superior,AZ is about a mile off and other side of road

Wrong Side of the Street

I have encountered the same problem on occasion with my nuvi 660. This has not happened with any regularity, but it can be disconcerting.

Geocoding often sets the location to the middle of the road where an address is located. Is it possible that if the location off to one side or the other, the turning direction might change?

Yes

DanielT wrote:

I have encountered the same problem on occasion with my nuvi 660. This has not happened with any regularity, but it can be disconcerting.

Geocoding often sets the location to the middle of the road where an address is located. Is it possible that if the location off to one side or the other, the turning direction might change?

I think it would be difficult to set the coordinates of some business to the center of the "road" as understood by Garmin's purchased Navteq "map". I wonder what happen were it to be there?

Now, it would be easy for someone "geocoding" a business to put the coordinates "in the road". Where, relative to where Navteq thinks the middle of the road is, will determine whether it will be the left or right side of the road that the GPS will announce.

It has been said many times - but is worth repeating. When geocoding a POI, put the coordinates within 30 meters of the center of the road - preferably at the entrance FROM the road that will get the driver to the POI.

Kind of funny isn't it.....

Yes in Chattanooga TN, I had all kinds of problems with the unit telling me Left when its on the right and right when its on the left.

Now in FL seems to be better map co-ordinates here.

Maybe when the earth shifted 2 degrees the other year it threw the whole system out. grin

Like others have said its great when you can see the places,and It gets me in the area, its real bad when your in Alaska with near white out conditions and your depending on it as a last means of survival keeping you on track instead of going over a side of a mountain.

I will say this, I really Like the 3d buildings that pop up in downtown Chattanooga, its cool certain key buildings spring up on the maps in 3d mode. In Florida at disney Cinderella's castle shows up if you map into disney, in downtown Orlando the suntrust tower.

Thats what I bought it for the 3d mapping and that part I really like.

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Garmin 3597 LMTHD

same problem

I have post severals messages having the same problem
I had the same problem with the 2010 map and still with the 2011 map. on 2 specific road it tell me to make right turn on a dead end road..and when I enter the highway that have almost a 360 circle rotation the messages RECALCULATING pop up.So I come to the conclusion that purchase update map is just waste of money unless they are building new highways and street. To me purchase new map just to have some new micky mouse icon that does not mean much to me does not cut it. I purchase mine in 2006 and it still take me from point A to point B .The problem is not the GPS but those map that are not worth purchase.

Always building....

Driver 38 wrote:

... So I come to the conclusion that purchase update map is just waste of money unless they are building new highways and street. To me purchase new map just to have some new micky mouse icon that does not mean much to me does not cut it. I purchase mine in 2006 and it still take me from point A to point B .The problem is not the GPS but those map that are not worth purchase.

Whether or not one gets map updates is a personal decision because, as you say, the GPS will generally get you from point A to B fairly well, Whenever i go on a trip, I also get an AAA TripTic as a supplement when I go on the road.

However, if you are satisfied with your GPS and plan on keeping it, you might consider the lifetime maps alternative. I got mine (after not doing any map update on my 765T for almost two years) for $68 and have felt that I made a good decision.

I get what everyone is saying

For me I travel 50 weeks a year, a GPS is a tool I need, and Map updates are essential. There are new roads around the country and when you get the new updates its real important. A great example is Texas near Austin they extended 35 and the Texas 100 to route you from Round Rock to Austin airport and around Austin traffic . This was not on the older maps its on there now and REAL important.

Yes a GPS can get me point A to point B, and I can still get there with paper maps (or no map at all)and when I am off road I can get there by compass. Its nice to have a pocket device that can show me theres a lake on the other side of that rise and my elevation is above 3000 ft (so expect Snow tonight) instead of unfolding and folding a paper map and carring an altimeter. laugh out loud

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Garmin 3597 LMTHD

My GPS...

My GPS needs a GPS so it doesn't get itself & me lost. laugh out loud laugh out loud laugh out loud laugh out loud

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Tampa, FL - Garmin nüvi 660 (Software Ver 4.90), 2021.20 CN NA NT maps | Magellan Meridian Gold

Mixing left and right

After updating my nuvi 3790l Lmt I have had three incidences where the nuvi told me a restaurant was on the left of road when it was on the right ,also told me to turn left to join a major hiway when the turn was on the right ,same day it showed arriving at Costco in Peterborough as being on the left when it was clearly on the right . This has been in the last week. Will call Garmin and see if there is a fix for this .

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HPT

foreign market

hil2 wrote:

After updating my nuvi 3790l Lmt I have had three incidences where the nuvi told me a restaurant was on the left of road when it was on the right ,also told me to turn left to join a major hiway when the turn was on the right ,same day it showed arriving at Costco in Peterborough as being on the left when it was clearly on the right . This has been in the last week. Will call Garmin and see if there is a fix for this .

That must be a gray market unit destined for foreign markets where they lean to the left, like China, Cuba, Canada... wink grin

Attn. Canadians is just a joke...

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Garmin 38 - Magellan Gold - Garmin Yellow eTrex - Nuvi 260 - Nuvi 2460LMT - Google Nexus 7 - Toyota Entune NAV

Addresses always seem to be a problem

Saw it first when going to the Mayo Clinic in Scottsdale AZ. The built-in (Garmin/Navteq) POI clearly used a street address that it figured was about 200 feet east of the intersection on a divided road. Obviously (it thinks) there's no way to drive through the intersection from the west and then cross the median to get to that address. So it directed me to go WAY around the "block" (actually almost a mile) in order to come to that point from the east. Of course, that intersection is actually Shea Blvd and North Mayo Clinic Entrance (make a left!)

I suspect that most built-in POIs are stored as addresses and the GPS interpolates between two points some significant distance apart on each road. Assume everything between "Center Street" and "Thirtieth" are 3000 evenly distributed addresses.

I also suspect the left/right problem is based on an assumption that odd numbers are on the north and east side of the street. Probably a safe assumption if all streets only run north/south or east/west... and no fair curving, you streets!

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Garmin Drivesmart 61, Nuvi 52, Nuvi 1390

Be interested in the reply

hil2 wrote:

... same day it showed arriving at Costco in Peterborough as being on the left when it was clearly on the right ... Will call Garmin and see if there is a fix for this .

There likely will be no fix. The best they will likely say is that they will report the problem.

It will probably be multiple maps versions before anything is fixed.

Wrong

hil2 wrote:

After updating my nuvi 3790l Lmt I have had three incidences where the nuvi told me a restaurant was on the left of road when it was on the right ,also told me to turn left to join a major hiway when the turn was on the right ,same day it showed arriving at Costco in Peterborough as being on the left when it was clearly on the right . This has been in the last week. Will call Garmin and see if there is a fix for this .

You were obviously driving in the wrong direction....LOL

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Bobby....Garmin 2450LM

no, it was

farrissr wrote:
hil2 wrote:

After updating my nuvi 3790l Lmt I have had three incidences where the nuvi told me a restaurant was on the left of road when it was on the right ,also told me to turn left to join a major hiway when the turn was on the right ,same day it showed arriving at Costco in Peterborough as being on the left when it was clearly on the right . This has been in the last week. Will call Garmin and see if there is a fix for this .

You were obviously driving in the wrong direction....LOL

a right-hand drive model.

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Illiterate? Write for free help.

right or left

i connected my garmin to my mac pc this morning and lo and behold there was a software update which i did but no way yet to tell if it was for the left or right problem as there was no info as to what the update was for ,so i am hoping i did the right thing will let you know if its a fix ( or not)

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HPT