Thailand StreetMap 2012.40 NT [Dual+Eng]

**basjke** · 3rd March 2013, 07:20 AM

I have the map installed on my Zumo 550, I know that's prehistoric, but most of the time when I'm on an elevated highway the Garmin will see me on the road below and vice versa.

Anyone else experience this, or should I blame a faulty gps unit.

**Neil** · 3rd March 2013, 09:15 AM

Sometimes this can happen with any unit, because of up to two reasons. (i) Maps are notoriously inaccurate as to the actual positions of the roads at times. (ii) Non-profession GPS units usually have satellite accuracy of up to 15 metres. Let's assume you have accuracy of 10 metres (meaning you could be one way or another) and the road on the map is several metres off its actual position. If the errors are cumulative in the same direction, the unit's 'snap to road' feature may well wrongly place you on a parallel service road instead of the highway or vice versa even if the roads are 15-20 metres apart. In the case of elevated roads, laterally the two roads may only be several metres apart and although you have entered the highway the unit assumes you are still on the service road for instance. Only when the two roads diverge sufficiently will the snap to road feature move you to the other more likely road.

**basjke** · 4th March 2013, 04:17 PM

Thanks for the explanation Neil, but to more precise describe my issue, I have 2 locations where i frequently experience this.

First location is the elevated highway Chonburi - Bangkok which I normally use. When I enter the highway the will locate me as taking ramp. As soon as I reach the toll booth it will start recalculating and place me again on the road below. When I reach the next access point, while being on the highway already, the GPS will again tell me that I'm taking the ramp, then recalculate and say I'm on below road.The issue finish at the 4th access.

The second location is from Rangsit direction Don Muang, where i seldom take the Don Muang highway, but where the Zumo tells me that I'm on the Highway. I think overthere the issue stops appearing when I pass the airport.

**Thefatboy** · 4th March 2013, 05:17 PM

There are issues with the English version of the map every release
TIT..................................... (This is Thailand)

**hiamatt** · 7th March 2013, 07:48 AM

I have Nuvi 2465 FW Thai.
Can I use TS_Dual map from post n1 together with JCV Thai from post n19?
Or do I need to use JCV Dual from post n4?

Help is appreciated.

Thanks

**catymag** · 7th March 2013, 04:01 PM

Originally Posted by hiamatt

I have Nuvi 2465 FW Thai.
Can I use TS_Dual map from post n1 together with JCV Thai from post n19?
Or do I need to use JCV Dual from post n4?

Help is appreciated.

Thanks

Use DUAL jcv from post n4 with DUAL map

**akesachol** · 8th April 2013, 03:21 PM

Does anyone have "Thailand DEM" map?
Can you upload it?
I can find it in TSM11 but the link is dead.
Thank you

**catymag** · 8th April 2013, 04:21 PM

Originally Posted by akesachol

Does anyone have "Thailand DEM" map?
Can you upload it?
I can find it in TSM11 but the link is dead.
Thank you

If you mean Garmin BaseMap Thai Routable with DEM v3.00
is here:
[Only registered and activated users can see links. ]
from this thread
[Only registered and activated users can see links. ]