Junction view size on Garmin Drive 51

Welcome to The Factory.

An interesting finding. I hope some other folks with the Drive 5x series offer their assistance. I haven't read here that this new JCV file size offering is well known and hope that someone does offer more help.

Some observations while we wait:

The Drive 51 is listed on the Garmin site as an "Entry-level GPS navigator with driver alerts" and is available in a US only or US/Canada map and it appears you have the US one. I can think of several possible causes for a JCV file to be 1/4 the size of other split-screen models:

a) the 450MB file is for North America while yours is for the Lower 49 states meaning that no JVs will be offered for Alaska, Canada, Mexico, etc. which reduces the file size;
b) the file only offers standard Junction Views, not Birdseye views;
c) compared to the more expensive Drive models, fewer Junction Views in the Lower 49 states are offered—I really hope this isn't the case;
d) the Drive 5x series may offer standard junction views in less detail than the photorealistic JVs in more expensive models.

I hate even suggesting this, but you may want to check the Garmin FAQs and forum threads here at The Factory that discuss the Large JCV file. It is known that the Large JCV file does not work with the Essential series nuvi models (3x, 4x and 5x) so there's the possibility it would not work, even if you wanted to try it, on the Drive 51.

Good luck and please share your findings with us.

The Drive 51 and 61 are the only set of units in the current Garmin lineup that don't have photoreal junction view. This is based upon the stock images Garmin provides for all their models here.

Since the Drive 51 and 61 don't have photoreal junction view, they can't use photoreal junction view files from the DriveLuxe, DriveAssist and DriveSmart units, and can't use the full-screen junction view file at all.

Thanks for the reply. Just lower 49 would explain part of it, but not sure if that alone would explain the reduction in size to about 1/4. I would think that for junction views, Garmin would have most here in the US. If the file would be half or so then maybe.

Thanks. I think that would probably explain why my file is so much smaller. No need to store photo-real junction views when the device can't do it.

Not sure who updates the JCV faq, but might not be a bad idea to add this information then.

Looking at the differences between them, looks like the DriveLux and DriveAssist have photo-real junction views whereas the 2 lower models do not.

http://www.poi-factory.com/node/45292

The Large JCV file is not compatible with the Essential Series nuvis (3x, 4x, and 5x) and the Drive 51 and 61 which are entry level devices according to Garmin and cannot display photorealistic Junction Views. These are the plain Drive models, not the DriveLuxe, DriveAssist or DriveSmart. Thanks to Factory member Strephon_Alkhalikoi for these important pieces of information. If you have one of these Essential Series nuvis or a Drive, do not try to use the Large JCV. If tried, no Junction Views will appear. Our user Melaqueman has also reported the inability to get the large JCV file to work with a nuvi 2797:

If any other nuvi 2797 owner, or maybe any other 7" display Garmin GPS owner tries the large JCV file on their device, we'd appreciate hearing if it works.

PS: ehendrix, once you've used the Drive for a goodly amount of time, we'd appreciate hearing if it offers birdseye views in addition to the standard JV. My guess is not but it'd be great to know for sure.

https://www.youtube.com/watch?v=zstrM3svwrE

I tried the large JCV on the DriveSmart 60LMT and it wouldn't display.

Craig I think you may remember that a year ago I tried everything possible on my 2797 to get the photo realistic view using the large JCV. Eventually I gave up and that is where it stands now.
I now live with whatever Garmin supplies me with, i.e the 400mb JCV.

I would speculate that if the device uses MTP by default it's not going to be able to use the full-screen junction view file. I'm fairly sure the 2797 is one of those devices. Same thing with the Drive, DriveSmart, DriveAssist, and DriveLuxe models.

What would the reason for that be? I'm always opened to learning new things and I'm lost as to why whether your using MTP or Mass Storage (USB) mode would affect whether a JCV file would work or not. If you can get the file on your device I'm interested in why the MTP settings would make a difference.

It's not MTP itself. The change to requiring MTP required new firmware, and in releasing the new firmware Garmin removed support for the full-screen JCV.

Got it thanks.

Well, it is apparently not all devices with MTP mode that won't use the large full screen JCV. Just for grins, I tested it on my 3597 which has MTP mode and the Large JCV file works on it and gives full screen views when browsing through the list of turns. In fact, it appears that I am seeing the large screen views even on intersectins that have active lane guidance. With the stock split screen file that comes on the 3597, I don't see the static views on the active lane guidance intersections. I am not sure how it would react to this (static view, active view or both) in actual navigation.

A good experiment even though I can hear melaquamen gnashing his teeth in frustration one nation away from me.

I regularly use the Full Screen JCV with my 3597. There are a couple of spots (curves turning almost 90 degrees, first left, then right) in downtown Atlanta that do not have full screen JCV images but do have active lane guidance built into the map. I75/I85 are joined at that point and the road is 5 or more lanes wide in each direction. The scrolling with purple lines in 5 lanes is dizzying, almost to the point of nausea. I cannot look at the GPS for this half mile of driving.

Edit: The active lane guidance does not show when simulating the drive. It does show when driving.

Does the fullscreen JV appear for just a few seconds as it does on the older devices it was intended for?

Wow, on the 3597, ALG only works when live and not during a simulation. Given this YouTube, I wonder which models require Live vs. those that can display ALG in simulations:

https://www.youtube.com/watch?v=4h-ofPy4Ha4

PS: I could swear (OK, maybe just affirm) that when you posted your message, you had a double post with the 2nd cut in size with an "I'm sorry." If so, how did you delete the 2nd?...or did I just imagine a double post?

This is why I said "Speculation". Obviously my speculation doesn't hold up to testing.

I did have an accidental double post. I noticed that Globe Turtle was online and sent her a quick message asking her to remove the 2nd post if possible. She can do so unless someone clicks on the post and replies before she is able to delete it.

Also, the full screen JCV is on from about .8 mile to .5 mile prior to the junction.

Thanks, you confirmed my two thoughts.

Don't forget that Angela our POI Factory GOD is able to do anything & everything

http://www.poi-factory.com/node/47346?page=0#comment-450043