Thread: City Navigator® North America NT 2012.20

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Originally Posted by mdcfn

This file have problems...

all the links and files in post one and in post 27 checked(multiupload direct links are fast and no captcha) , they extract and work fine-
I've tested the map in Mapsource and in nuvi 3790 and in Nuvi 1200-
JCV files posted work fine in my devices: in 3790 splitted screen , in 1200(asian sw) full screen.

Originally Posted by Frustated XT user

BTW, I have the 2012.20 torrent so I found a workaround....as always. Just need the junction view file and .tmz files.

Nice you finally got it, next time go for them at once ,just curious Frustrated user, what are .tmz files ?

Originally Posted by Frustated XT user

What are you talking about??? What misleading info? Your're providing misleading info. Copying a 340 mb file onto your 7x5 will consumer 340 mb. It doesnt matter how much the device sees or use, it still sucks up storage space, your GPS does not have unlimited storage. duh! Each device is different in storage capacity. This is why if you download the map through Garmin, the downloader updates how much it needs on your device. If your're suggesting the .jcv files are not backwards compatible, that is correct. If that's what you're trying to say, then please do so.

The fact I dont like how the downloads are setup and how the moderator is handling things is irrelevant.

Misleading info? You telling people that they can take their old JCV files from 2012.10 and use them in 2012.20 is misleading. It's hyperbole on your part, and it is flat out wrong information. At this point, no one should take you seriously, because you have proven yourself to not be credible.

Your discontent with the downloads and how Catymag chooses to run the site has bearing upon your credibility because it shows to all who look that you have an axe to grind. It is said that the guilty often are the first ones to jump to the defensive whenever their point of view is questioned. I'd say you've condemned yourself.

EDIT: I had to read your post a second time. In your arrogance you completely missed the point. Garmin is pushing a 51MB file to users of its nüvi receivers who upgrade their units to 2012.20 and that have small amounts of memory. 51MB is approximately 10% (actual number: 11.4%) of the full file. Which means there is no possible way that the small file can contain every junction view present in the large file. Please explain to me just how that is misleading, because numbers do not lie.

Originally Posted by smokefree

Just to look at things from a different perspective... is the 51 MB JCV file so much smaller than the 446 MB file because it contains less images of junctions? Or could it be the file size is smaller because the images have a lower resolution...??

I downloaded the smaller file linked in the first post and installed it just to see what would happen. The test route I ran was from the intersection of Route 81 and Rodman Street in Fall River, Massachusetts to a friend's house in Moncton, NB. The large file had 15 Junction Views along the route. The same route with the smaller file had zero.

The smaller file has fewer images.

I believe that they're trying to "persuade" the users of low end, i.e. unprofitable, GPS receivers to upgrade.

At the moment I am attempting to acquire the 150MB version of the JCV file for testing. On another forum that is discussing the Junction View issue one of the posters believes that the only difference between the 150MB file and the 446MB file is the resolution of the images. I want to test this, since if true it will be a better solution for the 1xxx series users than the 37xx JCV file. The distortion of the various junction view images in the 37xx JCV file when used on a 1xxx unit may well be eliminated with this file.

EDIT: My results are below.

Intersection of Rt. 81 and Rodman Street, Fall River, MA (Coordinates, -71.152273, 41.695415) to High Street, Moncton, NB (-64.793329, 46.095168)


51MB file - 0 Junction Views
152MB file - 11 Junction Views
446MB file - 15 Junction Views


Verdict: The 152MB file is an acceptable alternative to the 446MB file. It has far more Junction Views than the 51MB file, but still has less views than the 446MB file. Image distortion was not eliminated with this file, and thus images were not any sharper than the 446MB file. I cannot test whether the resolution of the images in the JCV file have changed, but I think that to be unlikely. What is more likely is that the 446MB file has two versions of the same image: portrait and landscape. The portrait images were most likely deleted, which would cut the file size by about half, and then some minor junctions were removed.

Comments: I'll have to debate which file I want in my 1300LM on a full-time basis. Currently I have the 446MB file installed since it is the most complete of the files. I have the space to spare on my MicroSD so....