Junction View

It has everything to do with the split screen junction views. Since the views take up only half the screen, the file is approximately half the size of the full screen view file. The 2 files are exactly the same as far as content.

With an 8Gb 2460 you will always get the biggest JCV file available, as part of the map update.

The big jcv file is full screen.

The half-screen file you have uses less space.

My 3760 gets the half-screen. I replace it with the full-screen, large file.

Edit: See above! He was faster!

When I first got the 2460 I used the split screen until the following map release, I then had the large JCV installed and now I'm back to split screen.

As far as I can tell both files have the same number of JCV, the comparison I did for my area did not find any JCV missing from the split screen.

The reason I'm now using the split screen is that it stays on the screen longer until I pass the junction, I found that although the large file has a nicer picture it when off sooner and before getting to the upcoming junction.

Thank you all for putting the JCV Little Big Blues to rest.

Having cut my teeth on the elusive, rare, endangered 1490T JCV sightings, I vaguely recall that when they did appear, they disappeared a bit too quickly. Sounds like the split screen, longer lasting image might be what the doctor ordered, and having the full location complement of jcv views now, I might actually get a chance to observe the beast in its native habitat for more than a scant few seconds.

On my 1690 I am not sure how much screen it takes up, but it is big enough as it is very noticeable. I just wish it could tell what lane you are in and not draw the picture from far left to right exit. I realize that type of accuracy is not possible without differential gps.

I find the JV s very helpful and saved me in some heavy traffic on unknown roads more than once.

wow. need to get a bigger SD card lol

The larger file junction view and the default split screen have the same number of junction views. The difference in file size being almost double on the full screen is due to graphics as you pointed out.

The full screen is nice but the split screen is more practical. The full screen only appears for a short time and will disappear, the split screen will remain on until you pass and guide you if it is on your route.

I used to download the full screen file but now I keep the smaller split screen file that comes with the new map update.

I think it's true that the JV stays on for a shorter time with the larger file but I still prefer the full screen over then split screen. I don't need as much time to view it, if it's a bigger view.

and prefer the split screen, especially if there are some odd turns after the exit, because of added info of both screens at the same time.

Junction view is an interesting idea, but do people find it truly helpful in their driving? The image seems to pop up just when you're looking for the distance remaining or the road layout. My unit hides everything with the junction view, I suppose it might be more useful as a split screen.

I only use the JCV image to preview the junctions on a route. This alerts me to any unsual situation I can expect to encounter on a trip.

I rely on the Lane Assist arrows when driving. I like that the large JCV image pops up and then quickly disappears. The large image draws my attention to the GPS, confirms a junction is upcoming, and then gets out of the way allowing me to rely on the Lane Assist arrows and other GPS screen information.

My junction view is still full screen. The thing that has happened a coupla times is the junction view came on several seconds too late. It didnt matter because I was going a different route, but that would be irritating if I was depending on it to tell me in time before the exit.

As a Pastor I visit many members in different parts of the city, so i use my GPS almost every other day, and the junction view is very active in almost every freeway drive.

I prefer half screen as you keep track better in busy areas

FYI, the larger one has way more junction views.

On what do you base that statement?

Have you open both files to count how many are in each?

Are you just guessing because one is bigger has to have more JCV?

Have you seen a Garmin document proclaiming one has more than the other?

I find the white vs. gray arrows of Lane Assist VERY helpful. It takes very little mental effort to see-interpret-implement. JCV and the overhead view are nice, but I sometimes find the multiple lines/colors of the overhead view can be a bit overwhelming to interpret in a hurry and/or in "intersting" traffic. Especially when there are multiple roadways in a small area (interchanges, service roads next to highways, etc.).

All 3 are useful in their own way.

Took my first limited access highway ride with the new 2460LMT. OMG - a JCV for each exit! And very photorealistic! And timely (not too far ahead, and not too late). I am impressed.

A nice feature/option would be to have the ability to touch the split screen JCV image and have it expand to full screen for a few seconds. Nice, but not necessary.

FWIW, the speedtrap warning ovals came up in larger font and were much easier to read than on the 1490T.

ETA: I forgot to mention that I am also impressed that the JCV is a "dynamic" image -- the magenta route arrow varies within the JCV photorealistic images to show the active route. Not a one size fits all image.

Yes indeedy, a well done Garmin Junction View is quite nice--and having them appear for many highway interchanges is icing on the cake.

The D3191050A.jcv file for the Nuvi 2460 is the correct one for split screen (2460 default) Junction Views. Its smaller size from the full screen is due to graphics only, it has the same amount of Junction Views on each.

The Full screen (D3060050A.jcv) appears at a set point before the junction and only remains on a short time, the split screen remains on until you pass the junction.

If you like you can test which one you like better.
Download the full screen and put it on a SD card in a JCV folder.
The go into the 2460's .system directory and open the JCV folder. Rename the file D3191050A.OLDjcv.

The Nuvi will only recognize one JCV.
Now insert the SD card and the full view will be active. Compare the two and see what appeals to you best. If you like the full screen better, then delete the D3191050A.OLDjcv from the nuvi'ssystem\JCV folder and copy the full screen one there.

If you prefer the split screen, just rename it back to D3191050A.jcv. Don't foret to remove the full screen one from your SD card.

Also, if you decided to put the full screen on the 2460 itself, the next time you do a map update it will install the default split screen again.
You MUST use a JCV file that is the same one that came with that particular map, whether split or full screen.
You CANNOT use a older version JCV file with a newer map, IT WILL NOT WORK.

Hope this claifies things for you.

Yes, thanks muell9k. I recall the full screen from the handful of times it came up on the hamstrung 1490T. Too brief and too soon to be much use. The remains-on-till-passed split screen view is much more useful.

I've had the "extra credit" big JV file from the source documented here for my 855 for many months now--obviously full-screen, so can compare it to split on my shiny new refurb 3790LMT.

When I'm running landscape mode, I think split is an upgrade. The smaller size makes the signs a little harder to read--but it is useful to have the map still up, and useful to have the JV stay on view until the actual turn has passed.

But in portrait it is not good. I run with four data fields, and my 3790 software leaves them up--so allocates the map a quite small bit of screen. Worse, it mis-centers that piece of screen, so the actual turn is perpetually just a little out of view forward.

Grumble--because for most other purposes I think I prefer portrait view. I guess I'll get used to reaching out and rotating the unit when I'm getting near an intersection where JV will be of use.

Although I agree that the split screen in portrait mode does cut part of the map off, aren't you better off just leaving the orientation of the Nuvi alone? You say you'd only change it when you need the JV but you would always have that. Isn't reaching out and moving the Nuvi from portrait mode to landscape a much more dangerous maneuver that outweighs any benefit that seeing your vehicle icon would provide.

What about the small (~450mb) file? I deleted it when I installed the big file, and now I'd like to change back. Is it available anywhere for download?

Thanks.

I think if you go the the my.garmin dashboard you'll find you have the option to redo the map download. If you do that, I think you'll find it will end with the intended JCV for your unit installed.

In future, you might wish to back up things before altering them.

i still have full screen JV on my 1450

I have an 885 and the view depends on which JCV file I load on it.

The one that actually belongs on it gives me one screen, but if I load the larger file on it, I get the split screen.

I REALLY don't want to download the whole thing all over again.

Thanks for the instruction re: backups.