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diff --git a/src/latlon.c b/src/latlon.c
index 612da89b0c858f1151f8f7c12a400b1b499e608d..a9e0beb6aecccb09552c35098f44bb08d7c38482 100644 (file)
--- a/src/latlon.c
+++ b/src/latlon.c
@@ -83,6 +83,10 @@ a=(slat * slat) + (cos(lat1) * cos(lat2) * slon * slon);
 return ((2.f * atan2(sqrt(a), sqrt(1.f - a))) * EARTH_RADIUS);
 }
 
+/**
+ * Calculate course from lat1,lon1 to lat2,lon2
+ *
+ */
 gdouble
 calculate_course(gdouble lat1, gdouble lon1, gdouble lat2, gdouble lon2)
 {