Thread: About Garmin maps Additions files (gmap3d-JCV-gmaptz-ASR-G2S)

you'r right, they are checksum and can be deleted. you can go to diagnostic menu and make nuvi recalculate it again. it will create new *.sum files.

hello catymag,

still grateful for the information given
an update for better understanding
and offline reading, includes a pdf.

no problem if you want disregard it
if not please delete the bigger one (651.8 KB)
due to spehling errors

regards
Damian

Originally Posted by smokefree

From post #1:



A friend abroad has a nüvi 1490. We know that the map IMG file does not go into a folder 'Garmin' but in a folder 'Map', whether it be on the unit itself or on a microSD card.

How do I interpret the term subfolder as the place for the JCV file?
Would that be the X:\Map\JCV folder or would that be the X:\JCV folder? (X: being the drive designation for either the nüvi or the microSD)

Here is the subtle difference that I believe I now understand. The nuvi 1490 card map files are in a folder "map", and the JCV file goes in a folder called "garmin" as catymag said....I did not understand this and put the JCV subdirectory and the img file in the "map" folder and was not able to get JCV to work...Older nuvis, such as the 265WT, put the maps in the "garmin" directory on the card so the JCV directory for those nuvis would in "garmin", but the card on the 1490 appears to require both a "garmin" (for the JCV) and "map" directory. On the 1490, there are different versions of the same map (that uses JCV) both in main memory (.system\JCV) and card, so there are JCV subdirectories in both places....whew...
Thx Catymag

I am another new user. I have a Kenwood in-dash gps receiver that I am wanting to update the mapping and associated files. I am downloading the latest North American maps - CN North America NT 2013-30. I have the latest time zone img - 4/11/12 and new JCV files. I am having trouble finding the gmap3d.img , ASR - SRX, sqlite db, and PNX files that match the new maps for proper functionality. I have been reading this and other forums for a couple of weeks now and I'm pretty sure I need these files as well as the maps. I would sure like some straight directions to these files if they exist here.

Thanks to all for the huge amount of info in this forum, it is a very steep learning curve that is also very ambiguous at times due to the conflicts and out dated links and different explanations of things. I'm slowly muddling my way through it!

Here I go, continuing my search!