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46 def distance(x1, y1, x2, y2): 47 """Get the distance between two points.""" 48 return ((x2 - x1) ** 2 + (y2 - y1) ** 2) ** 0.5

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37 def _calculate_distance(latlon1, latlon2) : 38 """Calculates the distance between two points on earth. 39 """ 40 lat1, lon1 = latlon1 41 lat2, lon2 = latlon2 42 R = 6371 # radius of the earth in kilometers 43 dlon = lon2 - lon1 44 dlat = lat2 - lat1 45 a = np.sin(dlat/2)**2 + np.cos(lat1) * np.cos(lat2) * (np.sin(dlon/2))**2 46 c = 2 * np.pi * R * np.arctan2( np.sqrt(a), np.sqrt(1-a) ) / 180 47 return c

10 def distance(x1, y1, x2, y2): 11 """Return the distance between the points (x1, y1) and (x2, y2)""" 12 t1 = (x1 - x2) 13 t2 = (y1 - y2) 14 return math.sqrt(t1 * t1 + t2 * t2)

60 def distance(x1, y1, x2, y2): 61 """ 62 l2 distance 63 """ 64 65 return math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2))

22 def distance(a,b,x,y): 23 return ((a - x)**2 + (b - y)**2)**0.5

53 def _py_distance(point1, point2): 54 ''' 55 Calculating great-circle distance 56 (see https://en.wikipedia.org/wiki/Great-circle_distance) 57 ''' 58 lon1, lat1 = (radians(coord) for coord in point1) 59 lon2, lat2 = (radians(coord) for coord in point2) 60 61 dlon = fabs(lon1 - lon2) 62 dlat = fabs(lat1 - lat2) 63 64 numerator = sqrt( 65 (cos(lat2)*sin(dlon))**2 + 66 ((cos(lat1)*sin(lat2)) - (sin(lat1)*cos(lat2)*cos(dlon)))**2) 67 68 denominator = ( 69 (sin(lat1)*sin(lat2)) + 70 (cos(lat1)*cos(lat2)*cos(dlon))) 71 72 c = atan2(numerator, denominator) 73 return EARTH_MEAN_RADIUS*c

156 def calcDistance(a,b): #calculate distance between two points. 157 try: 158 x1, y1 = a 159 x2, y2 = b 160 return math.hypot(x2 - x1, y2 - y1) 161 except Exception as e: 162 print("unable to calculate distance")

207 def calculate(self): 208 lat1, lng1 = map(radians, self.a) 209 lat2, lng2 = map(radians, self.b) 210 211 sin_lat1, cos_lat1 = sin(lat1), cos(lat1) 212 sin_lat2, cos_lat2 = sin(lat2), cos(lat2) 213 214 delta_lng = lng2 - lng1 215 cos_delta_lng, sin_delta_lng = cos(delta_lng), sin(delta_lng) 216 217 central_angle = acos(sin_lat1 * sin_lat2 + 218 cos_lat1 * cos_lat2 * cos_delta_lng) 219 220 # From http://en.wikipedia.org/wiki/Great_circle_distance: 221 # Historically, the use of this formula was simplified by the 222 # availability of tables for the haversine function. Although this 223 # formula is accurate for most distances, it too suffers from 224 # rounding errors for the special (and somewhat unusual) case of 225 # antipodal points (on opposite ends of the sphere). A more 226 # complicated formula that is accurate for all distances is: (below) 227 228 d = atan2(sqrt((cos_lat2 * sin_delta_lng) ** 2 + 229 (cos_lat1 * sin_lat2 - 230 sin_lat1 * cos_lat2 * cos_delta_lng) ** 2), 231 sin_lat1 * sin_lat2 + cos_lat1 * cos_lat2 * cos_delta_lng) 232 233 self.radians = d

242 def distance(x1,y1,z1,x2,y2,z2): 243 a=x2-x1 244 b=y2-y1 245 c=z2-z1 246 return math.sqrt(a*a+b*b+c*c)

12 def euclidean_distance(x1, x2, y1, y2): 13 """ Calculate Euclidean distance from (x1,y1) to (x2,y2). """ 14 15 return math.sqrt((x2 - x1) ** 2 + (y2 - y1) ** 2)