X-Git-Url: http://pileus.org/git/?p=grits;a=blobdiff_plain;f=src%2Fgis-util.c;h=f748cd2e280675a7170d143972f1ccbb3c277532;hp=951b45219aff7b5a733e890cf9459320f40c6302;hb=e7367efa416d0084899bd17f01b15cb351a44097;hpb=e589cb4bee133b2df34853fbbcc24355e1f2f4c9

diff --git a/src/gis-util.c b/src/gis-util.c
index 951b452..f748cd2 100644
--- a/src/gis-util.c
+++ b/src/gis-util.c
@@ -191,9 +191,9 @@ void xyz2ll(gdouble x, gdouble y, gdouble z,
  */
 gdouble ll2m(gdouble lon_dist, gdouble lat)
 {
-	gdouble azim = (-lat+90)/180*M_PI;
-	gdouble rad  = sin(azim) * EARTH_R;
-	gdouble circ = 2 * M_PI * rad;
+	gdouble incl = lat2incl(lat);
+	gdouble rad  = sin(incl) * EARTH_R;
+	gdouble circ = 2 * G_PI * rad;
 	return lon_dist/360 * circ;
 }