1390T routing vs BaseCamp routing

Former Member over 11 years ago

I have the latest BaseCamp software installed on my MacBook Pro and the latest system software installed on my nuvi 1390. The same map is installed on my computer and the 1390.

When I calculate a route using BaseCamp it usually looks like I would expect. However, when I calculate the route using the nuvi 1390 I find that while it gets to the desired destination it frequently takes a strange(!) path which differs from BaseCamp.

Why do the routes differ? :confused:

0 SUSSAMB over 11 years ago

Almost certainly due to different routing and avoidance options between BC and your GPS.

0 Former Member over 11 years ago

same options

Almost certainly due to different routing and avoidance options between BC and your GPS.

I checked to see that the avoidance options were the same and they were.

0 danham_ over 11 years ago

BC uses its own routing algorithms which may or may not match those in any of Garmin's GPS models. Obviously they try to make them come close when avoidances and preferences are set the same, but as you probably know, many GPS models have avoidances and prefs that BC does not, and vice-versa, so a perfect match is not going to happen very often.

That's why it is essential to preview pre-planned routes on your GPS and add "forcing" waypoints as necessary in BC until they do match after being imported to the GPS.

I have had some luck using the car "activity" in BC and setting it to "Fastest Time." This seems to come closest to my zumo 660, though I often need forcing points to make sure the routes match exactly.

-dan

0 Former Member over 11 years ago

Thank you DANHAM

BC uses its own routing algorithms which may or may not match those in any of Garmin's GPS models. Obviously they try to make them come close when avoidances and preferences are set the same, but as you probably know, many GPS models have avoidances and prefs that BC does not, and vice-versa, so a perfect match is not going to happen very often.

That's why it is essential to preview pre-planned routes on your GPS and add "forcing" waypoints as necessary in BC until they do match after being imported to the GPS.

I have had some luck using the car "activity" in BC and setting it to "Fastest Time." This seems to come closest to my zumo 660, though I often need forcing points to make sure the routes match exactly.

-dan

Thank you for the response. I suspected your description was the case. However, I don't understand why the algorithms must be different. Oh, well.

0 SUSSAMB over 11 years ago

That's why it is essential to preview pre-planned routes on your GPS and add "forcing" waypoints as necessary in BC until they do match after being imported to the GPS.

As the OP has a 13xx series nuvi he won't be able to add forcing waypoints as that series doesn't do 'routes'.

0 danham_ over 11 years ago

@BOPPI: They have to be different because they are different on various GPS models. One program cannot include all of the variations without becoming a huge blob of code or very expensive (it's free right now).

@SUSSAMB: Thank you; that got by me as I replied. Without route support there's no way to match routes from BC to the GPS no matter how BC is programmed.

-dan

0 Former Member over 11 years ago

As the OP has a 13xx series nuvi he won't be able to add forcing waypoints as that series doesn't do 'routes'.

What automotive models support 'routes'?

0 Former Member over 11 years ago

Depends what you mean by 'routes". nuvi's now support "trips" which are not traditional Garmin 'routes'.

If you look at he spec page for any Garmin unit on their website there's a listing for "Routes:".

0 = No routing (except for Go to)

> 0 and <= 10 usually means traditional Garmin routes (e.g. for the 1490T)

Any other figure (usually >= 100) means trips.

0 Former Member over 11 years ago

Depends what you mean by 'routes". nuvi's now support "trips" which are not traditional Garmin 'routes'.

If you look at he spec page for any Garmin unit on their website there's a listing for "Routes:".

0 = No routing (except for Go to)

> 0 and <= 10 usually means traditional Garmin routes (e.g. for the 1490T)

Any other figure (usually >= 100) means trips.

I am starting at a considerable disadvantage on this forum.

I currently using BaseCamp version 4.2.1.0 on a MacBook Pro (retina screen). I want to purchase another automotive GPS unit which supports the the same 'routes' as BaseCamp, The glass touch screens appear to support 'trips' which don't sound a bit like 'routes'. I will keep poking around.

However, some guidance would be greatly appreciated. Any takers?

0 Former Member over 11 years ago

I want to purchase another automotive GPS unit which supports the the same 'routes' as BaseCamp,

The issue of units not following the same route as PC/Mac software has been around for about 12 years to my knowledge. It is a constant complaint.

Now I've heard that Garmin's 2013 nuvi models do a better job of this. Whether this is true or not I can't say. Now those models implement "trips" not "routes". Garmin appears to have abandoned "routes" in nuvi's although I think outdoor models still implement them.

There has been a great deal of discussion about this subject here. It might pay to search this forum or use Google search.