Python realizes the distance and azimuth between two latitude and longitude points

from:http://blog.csdn.net/zhuqiuhui/article/details/53180395

1. Find the azimuth of two latitude and longitude points, P0 (LatA, Lona), P1 (LATB, lonb) (many blogs do not write very well, summarize here)

    def getdegree (LatA, Lona, LATB, lonb): "" "         Args: Point             P1 (LatA, Lona) point             P2 (LATB, lonb)         Returns :             bearing between the "GPS points,             default:the basis of heading direction is" ""          radlata = Radia NS (LatA)          Radlona = radians (lona)          RADLATB = radians (LATB)          radlonb = radians (lonb)          Dlon = radlonb- Radlona          y = sin (dlon) * cos (RADLATB)          x = cos (radlata) * sin (RADLATB)-Sin (radlata) * cos (RADLATB) * cos (dlon) 
   brng = degrees (atan2 (y, x))          brng = (brng +)%          return brng  

2. Find the distance function of two latitude and longitude points: P0 (LatA, Lona), P1 (LATB, LONB)

    def getdistance (LatA, Lona, LATB, lonb):          ra = 6378140  # radius of equator:meter          RB = 6356755  # radius of Polar:meter          flatten = (RA-RB)/RA  # Partial rate of the earth          # change angle to radians          Radlata = Radi Ans (latA)          Radlona = radians (lona)          RADLATB = radians (LATB)          radlonb = radians (lonb)                PA = Atan (Rb/ra * t An (radlata))          PB = Atan (Rb/ra * TAN (RADLATB))          x = ACOs (sin (PA) * sin (pb) + cos (PA) * cos (PB) * cos (radlona-ra DLONB)          C1 = (sin (x)-X) * (Sin (PA) + sin (pb)) **2/cos (X/2) **2          c2 = (sin (x) + x) * (Sin (PA)-sin (pb)) **2/ Sin (X/2) **2          dr = Flatten/8 * (c1-c2)          distance = RA * (x + dr)          return distance  

Python realizes the distance and azimuth between two latitude and longitude points