From a99af857eba37a1d678ac7fbe3067043e2c0e04b Mon Sep 17 00:00:00 2001
From: "Gary E. Miller" <gem@rellim.com>
Date: Mon, 25 Jul 2016 20:34:35 -0700
Subject: Move EarthDistanceSmall() into gps/misc.py

Other programs can use it.  The accuracy looks good, not great, but
WAY better than EarthDistance() and small angles.
---
 gpsprof | 16 ----------------
 1 file changed, 16 deletions(-)

(limited to 'gpsprof')

diff --git a/gpsprof b/gpsprof
index 31cbe6bd..9940056c 100755
--- a/gpsprof
+++ b/gpsprof
@@ -20,22 +20,6 @@ import socket
 import sys
 import time
 
-def EarthDistanceSmall(c1, c2):
-    "Distance in meters between two close points specified in degrees."
-    # This calculation is known as an Equirectangular Projection
-    # fewer numeric issues for small angles that other methods
-    (lat1, lon1) = c1
-    (lat2, lon2) = c2
-    dlat = lat1 - lat2
-    avglat = (lat1 + lat2 ) /2
-    dlon = (lon1 - lon2) * math.cos( math.radians( avglat ) )
-    # Earth Mean Radius 6371000 meters.
-    # one degree lat, average 111.133000
-    # at equator 110.567 km
-    # at poll 111.699 km
-    dist = math.sqrt( dlat * dlat + dlon * dlon) * 111133
-    return dist;
-
 
 class Baton(object):
     "Ship progress indication to stderr."
-- 
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