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Free Tools For Custom Garmin Vector Maps I – cgpsmapper

First in a series on tools for creating your own vector maps for Garmin GPS units.

cgpsmapper – cgpsmapper is a compiler that converts geographic features in the textual mp (Mapa Polska) format into the .img format required for Garmin GPS units. cgpsmapper was one of the first tools for making your own Garmin maps, if not the first. Since some other free tools require it for full functionality, it’s pretty much a must-have program for Garmin map creators.

The free version, available at the download page, supports compiling basic maps and many Garmin-compatible features, but other advanced features like POI indexing, routing and and addressing aren’t supported. Oher limitations of the free version include:

  • Adds copyright and “map created by” tags to every compiled map segment; this can get annoying if you have a lot of small segments
  • Non-commercial use only; you can’t sell maps compiled with this free version
  • Only supports .mp format files

Stan Kozicki, the author of cgpsmapper, also sells a number of commercial version that add progressively more features as you pay more money. The cheapest shareware version is $30, and adds direct support for shapefiles as input data, some indexing support and a few other features. Since all the other commercial versions cost $300 and up, they’re really for serious mappers only; but all shareware versions that don’t include routing come with a 30-day trial, so you can give them a test run.

cgpsmapper has a command-line-only interface, which makes it a bit cumbersome to use; fortunately, a number of the free map editors I’ll cover in future posts can interface directly with it. But even if you mainly use the map editors, you’ll want to download the cgpsmapper manual, as it’s the principal reference not just for the program, but for the mp map file format. mp is a text-only format, and it’s possible to create mp files using just a simple text editor; sample mp files are included in the program directory. For simple custom maps, you can just work with a map editor, and don’t really need to worry about the mp code. But if you want to take advantage of all of cgpsmapper’s features, you’ll really need to learn at least something about working directly in the mp format, no matter how painful. I wouldn’t create maps directly in this format with a text editor unless it only has a few features, but there are ways to modify map characteristics and feature definitions easily if you get familiar with the mp format.

It’s also possible to get maps compiled for free with many of the features only available in the shareware versions. Stan has installed a version of the compiler on the MapCenter2 website, a collection of free Garmin maps created by enthusiasts over the years. If you register with the site, you can upload your .mp map files and have them compiled by a professional-grade compiler that supports many of the features of the shareware versions. And as a bonus, you won’t get those annoying “map created by” tags on every map segment. There are several catches:

  • Once again, these maps aren’t for commercial use; you can’t sell them.
  • After submitting a map file for compiling, you’ll have to wait for it to get processed; maps get compiled twice a day.
  • Any map you create is automatically added to the MapCenter2 collection, and will be available for download by anyone.

Note: MapCenter2 appears to be down, and its future status is unclear. You can still download maps from the MapCenter1 site, but it doesn’t allow map compilation.

If you want to see a sample of the feature types supported by cgpsmapper, there’s a free “test pattern” of features available at the GPS Maps site; scroll down to just above the “Fun Stuff section. This program will install the test pattern in Garmin’s MapSource and/or BaseCamp programs:


A similar but slighly different test pattern is available in the Files section of the Yahoo Map Authors forum:


These pictures only show a small subset of the features in each full test pattern. What’s more, it’s possible to create your own custom icons, line patterns and area fill patterns, and use them as substitutes for, or as additions to, standard Garmin feature iconography. You do this by creating custom TYP files that describe the new custom feature appearance, and define the feature ID associated with them. I wouldn’t say that it’s an easy process, but it can be done, and gives you a lot of freedom to customize the map appearance. I’ll cover a few free tools that simplify the process of creating this custom feature iconography in future posts.

There are a few other free compilers for Garmin maps, and I’ll cover them in future posts as well. But none of them have the feature set, or power, of the free version of cgpsmapper; if you want to make your own Garmin maps, you must get a copy of at least the free version of cgpsmapper.

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6 Responses to “Free Tools For Custom Garmin Vector Maps I – cgpsmapper”

  1. 1 csdf

    I disagree with your closing comment: “There are a few other free compilers for Garmin maps, and I’ll cover them in future posts as well, but none of them have the feature set, or power, of the free version of cgpsmapper; if you want to make your own Garmin maps, you must get a copy of at least the free version of cgpsmapper.”

    mkgmap makes Garmin maps that have the same features as cgpsmapper (as far as I know), and it can take the free and ever-more-detailed OpenStreetMap database as input, so no messing around with MP files.

  2. 2 Leszek Pawlowicz

    Thanks for your comment. I’ll be covering mkgmap and associated tools in upcoming posts. For me, the one big advantage that cgpsmapper has over mkgmap is its ability to create custom TYP files.

  3. 3 csdf

    If you want to make TYPs (and you speak French, or can make educated guesses) have a try with TYPViewer:

  4. 4 Leszek Pawlowicz

    Thanks, Charlie – I hadn’t seen that one before. I’ve got a post coming up on TYP tools, and I’ll add it there. Also found your OSMGenerate utility, and I’ll add that to my upcoming lists of OSM Garmin tools, along with a link to your page with tutorials and tips on creating OSM Garmin maps.

  5. 5 Peter Hendricks

    Thanks for providing this goldmine of information. I just want to point out that Mapcenter2 has been offline for several months and going by comments by the author that he has ceased development it seems unlikely that it will ever be available again.


  6. 6 Leszek Pawlowicz

    Thanks, Peter – I’ve added a note to the post with this info.

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