un projet gnu assez abouti qui ressemble à heox

je vous donne le début de la documentation:

Welcome to the wonderful world of Geographical Information Systems (GIS)! Quantum GIS (QGIS) is an
Open Source Geographic Information System. The project was born in May of 2002 and was established
as a project on SourceForge in June of the same year. We’ve worked hard to make GIS software (which
is traditionaly expensive commerical software) a viable prospect for anyone with basic access to a Personal
Computer. QGIS currently runs on most Unix platforms, Window, and OS X. QGIS is developed using the
Qt toolkit (www.trolltech.com[...] ) and C++. This means that QGIS feels snappy to use and has a
pleasing, easy to use graphical user interface.
QGIS aims to be an easy to use GIS, providing common functions and features. The initial goal was to
provide a GIS data viewer. QGIS has reached that point in its evolution and is being used by many for
their daily GIS data viewing needs. QGIS supports a number of raster and vector data formats, with new
support easily added using the plugin architecture (see Appendix A for a full list of currenly supported data
formats). QGIS is released under the GNU Public License (GPL). Devloping QGIS under this license means
that you can (if you want to) inspect and modify the source code and guarantees that you, our happy user
will always have access to a GIS program that is free of cost and can be freely modified. You should have
received a full copy of the license with your copy of QGIS, and is also available as Appendix B.
Note: The latest version of this document can always be found at
qgis.sourceforge.net[...]de.html

il ne traite pas le format s57 ni bien des aspects utiles à un logiciel de navigation marine (marées) mais pourrait au moins servir de base de départ