Thread: City Navigator® North America NT 2012.20

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....