Yet been reverse-engineered, and OP most likely used such a map. It seems the current Garmin maps from Garmin use a format that has not With that file, I can reproduce the problem described in Gilles gave me access to an example Garmin file from a real device X-Greylist: delayed 526 seconds by postgrey-1.35 at buxtehude Thu, 09:25:10 UTC Subject: Bug is difficult and unlikely to be fixedĬontent-Type: text/plain charset=us-asciiĬontent-Transfer-Encoding: quoted-printable
Received: from sleske by iota.localnet with local (Exim 4.82_1-5b7a7c0-XX) Received: from iota.localnet (unknown )īy (Postfix) with ESMTPSA id DE4B0314454F URIBL_CNKR autolearn=no autolearn_force=no X-Spam-Status: No, score=-2.5 required=4.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE, See here for some preliminary results.Received: (at 601135) by 09:25:11 +0000 GMapTool can create "empty" DEM files and can also be used to extract DEM subfiles from IMG files with DEM information. Unfortunately, it seems that not much information is available right now. The DEM (Digital Elevation Model) subfile contains elevation data used by Mapsource (shading, height profiles of routes) and Basecamp (3D view, height profiles of routes). GMP file is a copyright message and the contents of a. Its filename is of the form IXXXXXXX.GMP (where the 'X' characters are uppercase hexadecimal digits). This appears to represent a subtile of the larger area covered by the. This is a fairly short file, containing a lookup table that categorises the characters in the map's codepage, and defines their collating sequence. This contains the searchable address table used for finding routing destinations. This contains the routing information, unused by those GPS units that don't offer routing. Information of this subfile can be found here. (end of FAT) The SubfilesĮach subfile has its own page, but as a quick reference the known subfiles are: Thus, if the physical block number is 2 then the FAT header is at 2 * 0x200 = 0x400, hence, the next physical block is at 0圆00 which contains the first FAT.Ġ0000600 01 30 30 30 31 30 30 30 30 52 47 4E 45 E8 2B 00. The size of a physical block is always 0x200 (= 512 bytes). The first FAT is found in the next physical block after this FAT header. The File Allocation Table starts with a header at the physical block number as defined in the IMG file header at address 0x040.
#Qmapshack garmin img nt format windows
Signature: DSKIMG 0x00 or DSDIMG 0x00 for demo mapĪ simple 'flat' filestore based on File Allocation Tables (FATs) though there is no serious resemblance between the format of a FAT used here and the more (in)famous FAT used in Microsoft's DOS and early Windows filestores. Mapsource flag, 1 - file created by Mapsource, 0 - Garmin map visible in Basecamp and HomeportĬhecksum, sum of all bytes modulo 256 should be 0 It would be simple to modify this to run on DOS/Windows. IMG file and to create a directory of files corresponding to its contents.
#Qmapshack garmin img nt format code
Here is source code for a simple Linux/Unix command-line program to take an. GMP subfiles do provide a kind-of subdirectory structure. The filesystem seems to be 'flat': that is, it doesn't directly support the concept of subdirectories, however the.
img file is basically a hard-disk image (complete with partition table) containing a filesystem which itself contains subfiles that provide the functionality for the Garmin GPS unit.
The IMG file contains all the info needed to render a map on a Garmin GPS unit, and may support autorouting information for those GPS units that offer navigation (i.e in-car GPS routers and some types of devices intended for hikers).
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