TWEAK: Using GmapTool to Create Finalized Mapset

In a previous post involving the upload of maps to a Garmin nuvi 255W, one of the methods used is to use mass storage mode. However, if you don't have a .img file to directly copy to your GPS unit, this method is practically futile.

True, the method is useless but not entirely hopeless. You may use a utility called gmaptool to join the MapSource map files to a single .img file and use that to copy over to your GPS internal memory or SD card. The software gmaptool can be downloaded here. Download the latest version available. As of this writing the version available is 0.60b.

When download is finished, install gmaptool. It will soon ask if you want to copy gmt.exe to the windows directory. Just let it copy the file. Since gmaptool requires cgpsmapper.exe, download cgpsmapper as well. Unpack it and note down the path to it.

In this example we will use the latest V1.25 demo map. Note that this is applicable to any MapSource compatible map files, not just limited to RoadGuide's maps. As I'm currently located in the Philippines, most people say RoadGuide has the best Garmin compatible map. Notice that once you unpack the executable downloaded from the above link there will be files created in C:\jklinc\ Note this path as we will be needing it again soon.

[1] Launch gmaptool. Under the Files tab, press "Add Directories". Add the directory C:\jklinc\ Once you have added the directory, gmaptool will automagically select the required files from that folder. You should have a screen like below.

Using GmapTool to Create Finalized Mapset

Note that there will be extra files in the C:\jklinc\ directory. Not all of those are needed in the output file. So if you choose "Add Files" there, make sure to select only the above listed files.

Drag-n-drop works in the same way as Add Files. Just select the files in Explorer and drag-n-drop it to the gmaptool window. Still, Add Directories is the safest option here.

[2] Under Options tab, locate cgpsmapper.exe. Remember to note down cgpsmapper location, as stated above. That tip is very useful in this step.

[3] Under Join tab, fill-out Output File. For this example, we will use C:\gmapsupp.img so it will be easier for us to locate the output file.

Using GmapTool to Create Finalized Mapset

[4] Press Join Selected or Join All. Then the gmaptool will join the selected files. Check the logs for errors. If error free, the output C:\gmapsupp.img file can be copied over to the GPS using mass storage mode.

Using GmapTool to Create Finalized Mapset

There you go folks, another way to create an image file for use on your Garmin GPS unit.

DISCLAIMER: I have performed the above procedure and tested to work on my Garmin nuvi 255W GPS unit. I also used gmaptool version 0.60b, the latest on the developer's download site. Your mileage may vary.


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