About¶
The Author¶
Fabien ALLAMANCHE (@allfab) — Geomatician at Vienne Condrieu Agglomération.
Computing and new technologies have always been my passions.
Background¶
Holder of a DUT in Civil Engineering from IUT A in Lyon (2004), Fabien is self-taught in the field of geomatics. He has over 20 years of professional experience in this sector.
Areas of Expertise¶
- General Geomatician — Full geographic data management: acquisition, analysis, representation
- GIS Developer — Specialized geomatics development and system administration
- Thematic Geomatician — Territorial analysis of projects
He also provides project management consulting, technical assistance, and technology watch in research and development.
Links¶
The Project¶
GARMIN IMG FORGE is a personal project born from the desire to create Garmin topographic maps using exclusively free software and open data.
The project follows an end-to-end FOSS (Free and Open Source Software) approach: open data (IGN BD TOPO, Etalab 2.0 license) transformed by open-source tools (ogr-polishmap, mpforge, imgforge) into ready-to-use maps for Garmin GPS devices.
Inspirations¶
This work builds on foundations laid by the Garmin cartographic community, notably:
- Articles from GPSFileDepot (2008, updated 2016) on creating custom Garmin maps
- The mkgmap project — open-source Java compiler that demonstrated it was possible to produce IMG files without proprietary tools
- The cGPSmapper documentation — which defined the Polish Map format as the intermediate standard
Licenses¶
The project adopts a hybrid licensing model, adapted to the nature of each component:
| Component | License | Reason |
|---|---|---|
| ogr-polishmap | MIT | GDAL driver — compatibility with the GDAL ecosystem (MIT/X), facilitates potential upstream integration |
| mpforge | GPL v3 | Standalone tool — copyleft, derivatives must remain open-source |
| imgforge | GPL v3 | Garmin IMG compiler — aligned with mkgmap (GPL v2), derivatives must remain open |
| Documentation / site | CC BY-SA 4.0 | Standard for documentation, with mandatory attribution |
| Produced maps | Etalab 2.0 | Inherited from IGN data (BD TOPO) |
Contributing¶
Contributions are welcome:
- Issues: github.com/allfab/garmin-img-forge/issues
- Source code: github.com/allfab/garmin-img-forge
Former site
The former project site remains available at allfab.github.io/garmin-ign-bdtopo-map.
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