gmf-selection-route.c, 15.2.2007, by frank334

selection of map tiles along route, corridor width approx. 2 x radius

Syntax: gmf-selection-route map-source.gmf map-destination.gmf routefile radius

Radius: min. distance route points to map-tile corners (measure: [km])
Route: ASCII lat/log-coordinate-list (comma-separated, one coordinate per line), Limited to 1Mio entries
       (like Kompass TK Format)

collect map tiles along route, approx. width 2*radius
