GPS (and related) Software for Linux

I'm in the process of writing some GPS (and related) software for Linux. This is what I have written so far:

An NMEA daemon (nmead) that receives and logs data from a GPS receiver, as well as allowing clients to connect and receive position data in real time.
A GIMP extension (gps) that can:
- Talk to the NMEA daemon
- Load a map
- Draw crosshairs & tracks to indicate where you are/have been.
I'm no longer working on this now that I've figured out how to draw images in X myself. The GIMP extension idea worked, but was too slow and would make some things that I plan to do unnecessarily hard.
A program (tile-image) to divide a large map (4.3Kx3.3K pixels) into manageably-sized images (384x384 pixels). Strangely enough, the sum of the sizes of the smaller TIFF files is less than the size of my original TIFF files?!
A program (gps) to do what the old GIMP-based GPS program did, but better :-). It currently can:
- Talk to the NMEA daemon
- Display a map, and let you scroll around it
- Place markers on the map
- Display a marker at your current location, and center the map over it.
A patch to xearth that adds the following features:
- -nmea hostname - connect to the NMEA daemon
- -pos gps [lat lon] - center the xearth image around your current location
- -markerfile built-in-gps - a new built-in marker file with one marker: ``You are here''
- Multiple marker sets so you can use built-in at the same time as built-in-gps

If you're interested in the above software, please email me (geoffrey@netcraft.com.au). I plan to release the above software under the GNU General Public License when it's half-usable by anyone apart from myself and I manage to get around to it (except for the GIMP extension, which is currently broken and not likely to be fixed).

I am in need of digital maps of Australia (raster or vector). I have the AUSLIG 250K series for South Australia, but would like more detailed maps. If you can help, please let me know!

GPS (and related) Software for Linux

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