Hamish B - 2008-10-27

here is a start, but not sure where to put it or go next:

calcxy (&x, &y, coords.current_lon,
coords.current_lat, current.zoom);
calcxytopos (gui_status.mapview_x /2, gui_status.mapview_y /2,
&coords.current_lat, &coords.current_lon, current.zoom);

Hamish