Thread: nüvi 3x0 SD & Map Size Limits

Originally Posted by quebec001

City North America NT 2014.40 full = ~2.11gig and without Mexico =~1.84gig fit on SD 2gig

Beware! Theoretically *), a 2 GB SD card with have space for 1.86 GB worth of data. In practise, a 2 GB SD card will only have around 1.83 GB of space available for data. See screen shot below:

.

*) 1 GiB = 2^30 = 1,073,741,824 bytes, whereas 1 GB = 10^9 = 1,000,000,000 bytes
Therefore a 2 GB SD card provides 2*(10^9/2^20) = 1.86 GB of storage space (and in practise, as mentioned, often even less).
As a result, the 1.84 GB USA & CA map may not fit on a 2 GB SD card.
For more detailed explanation, see here:

Code:

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Originally Posted by smokefree

Beware! Theoretically *), a 2 GB SD card with have space for 1.86 GB worth of data. In practise, a 2 GB SD card will only have around 1.83 GB of space available for data. See screen shot below:

.

*) 1 GiB = 2^30 = 1,073,741,824 bytes, whereas 1 GB = 10^9 = 1,000,000,000 bytes
Therefore a 2 GB SD card provides 2*(10^9/2^20) = 1.86 GB of storage space (and in practise, as mentioned, often even less).
As a result, the 1.84 GB USA & CA map may not fit on a 2 GB SD card.
For more detailed explanation, see here:

Code:

Please Login or Register to see the links

sorry but my kit work well in 2gig SD, check my post, i dont have problement with map without Mexico o0n 2gig SD, the bug is with full maps 2.11gig on bigger SD, i'll download actualy the Bam Bam's kit IMG for one other test

Originally Posted by tli

There are certain Garmin devices that won't work with SDcard larger than 2GB. FYI.

Some of these units include StreetPilot c3xx, StreetPilot i2 / i3, StreetPilot 72xx, StreetPilot 75xx and some Kenwood models.
There are also units that need updated firmware to be able to work with SDHC cards (cards > 2 GB), like zūmo 4xx and zūmo 5xx.

Then there are also units that do not recognise map files larger than 2 GB.
Some of these units include nüvi 3xx, nüvi 6xx, nüvi 5000 and StreetPilot c5xx.

for Tli you dont read well my thread, or my english is too poor (i speak french)----» i make 4 tests,

1. on 2gig SD for without mexico via mapsource «-----working well for search adress
2. on 8gig SD for full via mapsource search adress not working
3. on 8gig SD with map without mexico «----workin well for search adress so its for "smokefree" with 8gig SD smalest map same without mexico, working well, normaly i prefer 4gig SD card, actualy i dont have for test
4. on 8gig SD with Mapinstall.exe full size map, same problem for search adress tool

my next test is with BamBam's version IMG, i am in download actualy

For smokefree, ill check if i have new firmware for my nuvi360
For capebreton, yes its smell bad unlock, i'll working for, so same if my mapsource kit is not well unlocked, i finished my IMG on my SD card with gimgunlock.exe, its ok for without mexico and not well for full map

Originally Posted by smokefree

If it's a nüvi 360 you have: it can recognize SDHC cards but is not capable of recognizing map files larger than 2 GB, regardless of firmware version. That explains why only the smaller map works on your unit, not the full map.

Is not true, because some forum and garmin said, with old serie gps, -----» not working with SDHC more 2gig, is not true.

I already made test via mapsource and garmin topo map of canada with about 4gig of the nuvi 360 and has worked wonderfully! on a SDHC 4gig

I've combined europe and north america in one gmapsupp.img on a SDHC 4gig
the big problem, I think I'm poorly installed or unlocked, I'll make test

P.S. no new update firmware for my gps !

if is because more 2gig is problem, why 3gig topo maps workk well ?diff betwin topo and city map ?
and is not my install and not my unlock because the bam bam IMG maps have the same problem , map is not locked, but search address mode not work !

Originally Posted by tli

I don't know if this might be a workaround since I've never tried, but one can try to split the full mapset into two files with each no larger than 2GB: gmapprom.img and gmapsupp.img

You might give this a try...

I will perhaps again later test, its a good idea for one test

i confirm, on streetpilot c530 not search address working and in my nuvi 360

Originally Posted by quebec001

Originally Posted by smokefree

If it's a nüvi 350 you have: it can recognize SDHC cards but is not capable of recognizing map files larger than 2 GB, regardless of firmware version. That explains why only the smaller map works on your unit, not the full map.

Is not true, because some forum and garmin said, with old serie gps, -----» not working with SDHC more 2gig, is not true.

Please note this limitation of incompatibility with SDHC cards only applies to certain models, not the nüvi 350! Nüvi 350 can read SDHC cards of 4 GB. Please read post #4 carefully.

Originally Posted by quebec001

I already made test via mapsource and garmin topo map of canada with about 4gig of the nuvi 350 and has worked wonderfully! on a SDHC 4gig

I seriously doubt that, as the nüvi 350 is not capable of recognizing map files exceeding a 2 GB size. You don't need to take my word for it, you can read it for yourself here:

Code:

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This information pretty much confirms what I wrote in post #4.

Originally Posted by quebec001

if is because more 2gig is problem, why 3gig topo maps workk well ?diff betwin topo and city map ?

As established earlier, no map file larger than 2 GB will work on a nüvi 350, regardless of it being a topo map or a road map.