Implemented multi-view matplotlib cluster interface; Fixed some bugs

Sieboldianus · Dec 21, 2017 · 31acf86 · 31acf86
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commit 31acf86
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diff --git a/__pycache__/def_functions.cpython-36.pyc b/__pycache__/def_functions.cpython-36.pyc
diff --git a/def_functions.py b/def_functions.py
@@ -40,6 +40,23 @@ def daterange(start_date, end_date):
     for n in range(int ((end_date - start_date).days)):
         yield start_date + timedelta(n)
 
+from math import radians, cos, sin, asin, sqrt
+def haversine(lon1, lat1, lon2, lat2):
+    """
+    Calculate the great circle distance between two points 
+    on the earth (specified in decimal degrees)
+    """
+    # convert decimal degrees to radians 
+    lon1, lat1, lon2, lat2 = map(radians, [lon1, lat1, lon2, lat2])
+    # haversine formula 
+    dlon = lon2 - lon1 
+    dlat = lat2 - lat1 
+    a = sin(dlat/2)**2 + cos(lat1) * cos(lat2) * sin(dlon/2)**2
+    c = 2 * asin(sqrt(a)) 
+    # Radius of earth in kilometers is 6371
+    km = 6371* c
+    m = km*1000
+    return m
 
 #this class is needed to override tkinter window with drag&drop option when overrideredirect = true
 #class App: