Thread: Garmin City Navigator Europe NT(Unicode) 2015.10

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Originally Posted by japseye

Has anyone yet managed to fit any 2GB version on to an actual 2GB SD card? If so please tell what brand of card. Every version that Ive tried wont fit.

What is the actual map coverage of the 2GB post #32 (CN Europe NTU 2015.10 West & Central_Unlocked) Theres a link to coverage but it explains nothing.

I suggest to download pc version, unlock and build with Mapinstall your preferred img that fits your sd .


Inviato dal mio GT-I9100

Originally Posted by japseye

Has anyone yet managed to fit any 2GB version on to an actual 2GB SD card? If so please tell what brand of card. Every version that Ive tried wont fit.

What is the actual map coverage of the 2GB post #32 (CN Europe NTU 2015.10 West & Central_Unlocked) Theres a link to coverage but it explains nothing.

Your problem is that 2GB SD cards are measured in decimal i.e. 2GB=2,000,000,000 bytes [in theory], whereas the FAT16 file size limit [and consequently Garmin's maximum image size for older devices such as nuvi 3x0/6x0] is 2GiB less 1 byte [GiB being gibibyte, or an original binary GB] which is 2,147,483,647 bytes. Therefore a so-called 'just under 2GB' image file won't fit on a so-called '2GB' SD card which at best probably only has about 1.86GiB of usable space [~1,998,500,000 bytes]. The rule of thumb is that if the unit's internal memory is FAT16 then it cannot see an image 2GiB or over even if capable of reading FAT32 SD cards, such as 3x0/6x0 nuvi series are for instance. Those old units cannot use this unicode map effectively though of course, the EU non-unicode is the map for them.

Most image files posted with the claim that they are 'under 2GB' are in fact usually just under 2GiB and therefore need to go on a 4'GB' card. Microsoft still uses the original binary meaning of KB/MB/GB/TB etc which is that 1KB is 1,024 bytes [2 to the power of 10]; 1MB is 1KB x 1024 = 1,048,576 bytes [2 to the power of 20]; 1GB is 1MB x 1024 = 1,073,741,824 bytes [2 to the power of 30]; 1TB is 1GB x 1024 = 1,099,511,627,776 bytes [2 to the power of 40]. So in Properties it will report quite correctly [in binary] that your 1GB card has only ~938MB or ~0.916GB, a 2GB has ~1.84GB, a 4GB card has ~3.72GB, and an 8GB has ~7.39GB in usable space only.

It's also possible to format a 4GB [~3.72GiB] card in FAT16 so that very old units such as StreetPilots which can't see FAT32 can read them and use an image up to 2GiB [2,147,483,647 bytes] instead of being limited on a 2GB card to an image of ~1.86GiB [~1,998,500,000 bytes]

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Originally Posted by Neil

Your problem is that 2GB SD cards are measured in decimal i.e. 2GB=2,000,000,000 bytes [in theory], whereas the FAT16 file size limit [and consequently Garmin's maximum image size for older devices such as nuvi 3x0/6x0] is 2GiB less 1 byte [GiB being gibibyte, or an original binary GB] which is 2,147,483,647 bytes. Therefore a so-called 'just under 2GB' image file won't fit on a so-called '2GB' SD card which at best probably only has about 1.86GiB of usable space [~1,998,500,000 bytes]. The rule of thumb is that if the unit's internal memory is FAT16 then it cannot see an image 2GiB or over even if capable of reading FAT32 SD cards, such as 3x0/6x0 nuvi series are for instance. Those old units cannot use this unicode map effectively though of course, the EU non-unicode is the map for them.

Most image files posted with the claim that they are 'under 2GB' are in fact usually just under 2GiB and therefore need to go on a 4'GB' card. Microsoft still uses the original binary meaning of KB/MB/GB/TB etc which is that 1KB is 1,024 bytes [2 to the power of 10]; 1MB is 1KB x 1024 = 1,048,576 bytes [2 to the power of 20]; 1GB is 1MB x 1024 = 1,073,741,824 bytes [2 to the power of 30]; 1TB is 1GB x 1024 = 1,099,511,627,776 bytes [2 to the power of 40]. So in Properties it will report quite correctly [in binary] that your 1GB card has only ~938MB or ~0.916GB, a 2GB has ~1.84GB, a 4GB card has ~3.72GB, and an 8GB has ~7.39GB in usable space only.

It's also possible to format a 4GB [~3.72GiB] card in FAT16 so that very old units such as StreetPilots which can't see FAT32 can read them and use an image up to 2GiB [2,147,483,647 bytes] instead of being limited on a 2GB card to an image of ~1.86GiB [~1,998,500,000 bytes]

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Size card depends on the manufacturer. Example cards of 32GB, it can be the difference of 400MB

Garmin confirmed me that now NT version exit 2 times a year

Inviato dal mio HTC One utilizzando Tapatalk

@spijun
That's absolutely NOT the point of my post. Every '2GB' card has less than 2,000,000,000 bytes available capacity and that can vary between same sized cards even of the same brand which is also interesting, but immaterial to what japseye was trying to do i.e. put an almost 2GiB image file on a 2GB card:

Originally Posted by japseye

Has anyone yet managed to fit any 2GB version on to an actual 2GB SD card? If so please tell what brand of card. Every version that Ive tried wont fit.

What is the actual map coverage of the 2GB post #32 (CN Europe NTU 2015.10 West & Central_Unlocked) Theres a link to coverage but it explains nothing.

Perhaps you didn't understand what the ~ symbol means in my post, it means approximately or thereabouts to indicate that the sizes are examples only.

Originally Posted by japseye

Thanks for replies regarding this, thats why I asked about certain brands. I know that some hold more data than others.
So a 2gb release is rather misleading. It wont fit on a 2gb SD card but will fit on a 4gb one. But if I use a 4gb one then I could use the full release on it instead of the 2gb one. I really dont see the point in a 2gb release then.

@japseye
The variance in 2GB cards is not great, and usually much less than 100 MB in 4GB cards anyway, but 'no brand' cards can really cheat you. The main thing is that they never have the fully decimal 2GB of 2,000,000,000 bytes anyway because there is info hard coded during manufacture, even if the card had the full 2GB to start with [none ever do]. The near 2GiB images you are seeking are usually made to just under the 2GiB FAT16 limit as I stated. Some uploaders make even smaller images which they state will fit on a 2GB card, but because of the variance as pointed out even if they fit on some they may not fit on another. Best to just use 4GB cards with early nuvi 3x0/6x0 because they can only see an image of less than 2GiB, but if you have something later it can see up to a 4GiB image file on larger cards. Afaik, you can't even buy 2GB cards from retailers anymore [maybe on eBay still]. 4GB are smallest where i shop anyway.

Same problem for almost 4GiB image on a 4GB card though, as with almost 2GiB on 2GB card.