summaryrefslogtreecommitdiff
path: root/lib
diff options
context:
space:
mode:
authorJarkko Hietaniemi <jhi@iki.fi>1999-02-02 10:53:20 +0000
committerJarkko Hietaniemi <jhi@iki.fi>1999-02-02 10:53:20 +0000
commit2d06e7d7c9e4b70e32f2d5dad2fa2fd30f810ebf (patch)
tree291ec8196fe4d4f484366501aff19e4010f898fb /lib
parent66697e5766d9d4ff63ad11b5971066b3ece7413b (diff)
downloadperl-2d06e7d7c9e4b70e32f2d5dad2fa2fd30f810ebf.tar.gz
Update Trig.pm from maint-5.005.
p4raw-id: //depot/cfgperl@2759
Diffstat (limited to 'lib')
-rw-r--r--lib/Math/Trig.pm9
1 files changed, 5 insertions, 4 deletions
diff --git a/lib/Math/Trig.pm b/lib/Math/Trig.pm
index b021739691..924286d204 100644
--- a/lib/Math/Trig.pm
+++ b/lib/Math/Trig.pm
@@ -385,11 +385,12 @@ defaults to radians.
If you think geographically the I<theta> are longitudes: zero at the
Greenwhich meridian, eastward positive, westward negative--and the
-I<phi> are latitudes: zero at North Pole, northward positive,
+I<phi> are latitudes: zero at the North Pole, northward positive,
southward negative. B<NOTE>: this formula thinks in mathematics, not
-geographically: the I<phi> zero is at the Nort Pole, not on the
-west coast of Africa (Bay of Guinea). You need to subtract your
-geographical coordinates from I<pi/2> (also known as 90 degrees).
+geographically: the I<phi> zero is at the North Pole, not at the
+Equator on the west coast of Africa (Bay of Guinea). You need to
+subtract your geographical coordinates from I<pi/2> (also known as 90
+degrees).
$distance = great_circle_distance($lon0, pi/2 - $lat0,
$lon1, pi/2 - $lat1, $rho);