plus 是app的方法,肯定不行了,可以用直接算:
function getFlatternDistance(lat1,lng1,lat2,lng2){
var f = getRad((lat1 + lat2)/2);
var g = getRad((lat1 - lat2)/2);
var l = getRad((lng1 - lng2)/2);
var sg = Math.sin(g);
var sl = Math.sin(l);
var sf = Math.sin(f);
var s,c,w,r,d,h1,h2;
var a = EARTH_RADIUS;
var fl = 1/298.257;
sg = sg*sg;
sl = sl*sl;
sf = sf*sf;
s = sg*(1-sl) + (1-sf)*sl;
c = (1-sg)*(1-sl) + sf*sl;
w = Math.atan(Math.sqrt(s/c));
r = Math.sqrt(s*c)/w;
d = 2*w*a;
h1 = (3*r -1)/2/c;
h2 = (3*r +1)/2/s;
return d*(1 + fl*(h1*sf*(1-sg) - h2*(1-sf)*sg));
}
5***@qq.com
a 表示什么?
2020-05-12 14:11
嗨哆嚒
回复 5***@qq.com: 地球半径
2020-09-21 14:44
嗨哆嚒
getRad函数是什么
2020-09-21 14:47
clltt
回复 嗨哆嚒: 是高德地图的方法
2020-12-15 18:45