lyx
(Lyx)
2
First of all, welcome to OSM and thanks for supporting the project.
OSM does not automatically create vector data from gpx tracks, instead uploaded gpx data is used as background image to draw over it with a map editor like Potlatch (the “Edit” tab on the project website) or JOSM (java based desktop application).
Probably the best way of getting your data in without creating conflicts with data already existing in OSM would be to make your raw data available for download, split into manageable pieces (i.e. not all data in one file, but pieces that can be integrated in one hour of work or so) and creating a list of available files on the osm wiki. Users could then fetch one of the files, mark it on the wiki page as being processed by them and integrate it using their preferred editor.
Best starting point for finding users working on the map of Tunisia would be the wiki project page for Tunisia at http://wiki.openstreetmap.org/wiki/WikiProject_Tunisia