vba如何按照经纬度计算距离
时间: 2023-09-07 12:01:26 浏览: 87
在VBA中,按照经纬度计算距离可以使用Haversine公式。Haversine公式可以用来计算两个点(地球上的经纬度)之间的最短距离(球面距离),即地球上两点之间的弧长。以下是一个使用VBA编写的示例函数:
```vba
Function CalculateDistance(lat1 As Double, lon1 As Double, lat2 As Double, lon2 As Double) As Double
Dim R As Double
Dim dLat As Double, dLon As Double
Dim a As Double, c As Double, d As Double
R = 6371 ' 地球平均半径(km)
dLat = WorksheetFunction.Radians(lat2 - lat1)
dLon = WorksheetFunction.Radians(lon2 - lon1)
a = Sin(dLat / 2) * Sin(dLat / 2) + Cos(WorksheetFunction.Radians(lat1)) * Cos(WorksheetFunction.Radians(lat2)) * Sin(dLon / 2) * Sin(dLon / 2)
c = 2 * WorksheetFunction.Asin(Application.Min(Sqr(a), 1)) ' 避免计算误差超出范围
d = R * c
CalculateDistance = d
End Function
```
使用此函数,你可以传入两个点的经纬度坐标,然后计算出它们之间的距离(以km为单位)。函数返回结果将是一个浮点数,表示两个点之间的距离。例如:
```vba
Sub TestDistanceCalculation()
Dim distance As Double
distance = CalculateDistance(31.2304, 121.4737, 40.7128, -74.0060)
MsgBox "两地之间的距离:" & distance & " km"
End Sub
```
在此示例中,我们计算了上海(31.2304° N,121.4737° E)和纽约(40.7128° N,-74.0060° E)之间的距离,并将结果以消息框的形式输出。