Thread: Garmin City Navigator Europe NT 2014.20

Official gmapsupp.img downloaded over mygarmin is smaller then this in first post.
Garmin change something, but what?

I made mistake, this post must be in CN NT thread not in unicode.

Note by catymag : moved to the right thread

Originally Posted by lolypop000

Official gmapsupp.img downloaded over mygarmin is smaller then this in first post.
Garmin change something, but what? [/B]

The good manner is checksum for files! Pity that we do not use this manner here. The one exception for this method is gmapprom.img. But really this file is the same for all besides a some different values in the beginning of file. It are time and date of creation. I usually calculated checksum (md5 for example) not for whole gmapprom.img. I mark the block from GARMIN (x42) to end of file and save checksum for it. In the next time when I get new gmapprom.img file from webupdater I only check checksum for this block. If it is equal I have full assurance that no change took place in it!