+ // set a possibly independent location for scenery data
+ envp = ::getenv( "FG_SCENERY" );
+
+ if ( envp != NULL ) {
+ // fg_root could be anywhere, so default to environmental
+ // variable $FG_ROOT if it is set.
+ fg_scenery = envp;
+ } else {
+ // Otherwise, default to Scenery being in $FG_ROOT/Scenery
+ fg_scenery = "";
+ }
+
+ airport_id = "P13"; // default airport id