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Mkgmap is a complex command-line application developed to provide you with the means of converting OpenStreetMaps information, specifically tags, into image maps, which can then be loaded onto Garmin GPS devices and help you reach your destination quicker.

The mkgmap program takes OpenStreetMap data and generates a map in the Garmin .img file format so that it can be loaded onto compatible GPS units.

If you are not already familiar with Open Street Map (OSM) then you why not head over to the OSM website and maybe get involved. The idea is create a map of the whole world.

Features:

Generates a map directly from a file saved from JOSM or from an extract of the main OSM planet file.
Converts several .osm files in one run of the program to create a map tile set.
Creates a .tdb file and an overview map that can be used to view the maps in MapSource or QLandkarte.
Creates a gmapsupp.img file that can be copied directly to an SD card.
Can also combine previously produced .img files into one gmapsupp.img file.
Create a .tdb and overview map from previously produced .img files.
The mapping between OSM features features in the Garmin map can be customised.
Transliteration of characters to ascii where that is possible to enable viewing on low end devices or for international maps.
Character set can be specified for display on capable GPS devices.
Control over the zoom levels that any feature appears at.