How to merge Garmin maps with Gmaptool

**catymag** · 6th April 2013, 12:03 PM

Originally Posted by odelacruz

What do you mean loosing full search capabilities? Can you point me to the thread where I can use MapSource to join maps?

[Only registered and activated users can see links. ]
this and more here
[Only registered and activated users can see links. ]

Gmaptool splitted .IMGs dont have search enabled:Gmaptool can create a Mapsource version starting from an .img map file, but these Gmaptool MS installations dont have search enabled because Gmaptool cant decode Mapsource address index in .img.(MDR subfile)
If you have original Garmin Mapsource installations made .IMGs instead, you can join them with Gmaptool ,like wrote in starting post and have search enabled because Mapsource imported correctly MDR files in the selected .IMGs.
Every JCV file is associated by its MAPID to its related .img, so it will work if the MAPID is the same in JCV and in .img.

**dc5dd** · 3rd June 2013, 03:36 AM

@Catymag Does gmaptool merge chinese and english maps? Thanks

**sergio2** · 3rd June 2013, 07:15 AM

Hi,

You can merge all maps you want : the only limit is that the resulting .img file can't be over 4 Gb to be read by your GPS.

**yorkim** · 26th January 2016, 09:21 AM

Does the 4Gb max size restriction also apply to Basecamp?

**smokefree** · 26th January 2016, 03:43 PM

Originally Posted by yorkim

Does the 4Gb max size restriction also apply to Basecamp?

The 4 GB limit results from the FAT32 format of the memory card.

**yorkim** · 26th January 2016, 07:54 PM

Thanks, there must be some other reason why it doesn’t work then. I am trying to join some of the new GB Ordnance Survey maps:
[Only registered and activated users can see links. ]
GMapTool creates an .img file, but Basecamp doesn’t read it and I get the following warning multiple times:
== Warning: repeated map ID number.
I wonder whether that is because the maps overlap. Does anyone know how I can join these files?

**catymag** · 27th January 2016, 01:22 AM

Originally Posted by yorkim

Thanks, there must be some other reason why it doesn’t work then. I am trying to join some of the new GB Ordnance Survey maps:
[Only registered and activated users can see links. ]
GMapTool creates an .img file, but Basecamp doesn’t read it and I get the following warning multiple times:
== Warning: repeated map ID number.
I wonder whether that is because the maps overlap. Does anyone know how I can join these files?

Yes you have overlapping tiles, there are some tiles with the same MapId.
Resulting .img, even if you remove overlapping tiles, would exceed 4 Gb, so not possible to use in GPS and to be displayed from SD in Basecamp.

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