liulei/jx-callback
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gazebo
2019-11-27 17:59:28 +08:00
parent d6e172f6f9
commit d6205e955d
1 changed files with 3 additions and 0 deletions
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3
business/jxutils/jxutils.go
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@@ -210,6 +210,9 @@ func EarthDistance(lng1, lat1, lng2, lat2 float64) float64 {
lng2 = lng2 * rad lng2 = lng2 * rad
theta := lng2 - lng1 theta := lng2 - lng1
dist := math.Acos(math.Sin(lat1)*math.Sin(lat2) + math.Cos(lat1)*math.Cos(lat2)*math.Cos(theta)) dist := math.Acos(math.Sin(lat1)*math.Sin(lat2) + math.Cos(lat1)*math.Cos(lat2)*math.Cos(theta))
if dist < 0 {
dist = 0
}
return dist * radius return dist * radius
} }