That's looking good - but you may want to change some of the defaults (size, resolution, scale, colors etc) - because it seems you can hardly use the device at the current settings ?
Depending on what you have in mind, some layers can be customized - see the section on styling and scaling, or start here:
http://wiki.flightgear.org/Canvas_Snipp ... re_Stylingbesides, you are probably not all that interested in navaid stuff - but all the ground network/OSM stuff that some folks have been working on ?
If so, I'd suggest to get in touch with ThomasS, who's done related work a while ago:
http://wiki.flightgear.org/Ground_Services