最近做有關(guān)GPS軌跡上有關(guān)的東西,花費(fèi)心思較多,對兩個常用的函數(shù)總結(jié)一下,求距離和求方位角,比較精確,歡迎交流!
1. 求兩個經(jīng)緯點(diǎn)的方位角,P0(latA, lonA), P1(latB, lonB)(很多博客寫的不是很好,這里總結(jié)一下)
def getDegree(latA, lonA, latB, lonB): """ Args: point p1(latA, lonA) point p2(latB, lonB) Returns: bearing between the two GPS points, default: the basis of heading direction is north """ radLatA = radians(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 + 360) % 360 return brng
2. 求兩個經(jīng)緯點(diǎn)的距離函數(shù):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 = radians(latA) radLonA = radians(lonA) radLatB = radians(latB) radLonB = radians(lonB) pA = atan(rb / ra * tan(radLatA)) pB = atan(rb / ra * tan(radLatB)) x = acos(sin(pA) * sin(pB) + cos(pA) * cos(pB) * cos(radLonA - radLonB)) 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
以上這篇python實(shí)現(xiàn)兩個經(jīng)緯度點(diǎn)之間的距離和方位角的方法就是小編分享給大家的全部內(nèi)容了,希望能給大家一個參考,也希望大家多多支持腳本之家。
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