找到2個經緯度點之間的距離（單位：米）

Question

這些是我的2個點我怎樣才能得到他們之間的距離（米）？

52.33816422 -106.2828899 52.33816422 -106.2828634

所有convesions programms的尋找ddmm.mmmmmmm和dddmm.mmmmmmmm

Answer 1

def distance loc1, loc2 
    rad_per_deg = Math::PI/180 # PI/180 
    rkm = 6371     # Earth radius in kilometers 
    rm = rkm * 1000    # Radius in meters 

    dlat_rad = (loc2[0]-loc1[0]) * rad_per_deg # Delta, converted to rad 
    dlon_rad = (loc2[1]-loc1[1]) * rad_per_deg 

    lat1_rad, lon1_rad = loc1.map {|i| i * rad_per_deg } 
    lat2_rad, lon2_rad = loc2.map {|i| i * rad_per_deg } 

    a = Math.sin(dlat_rad/2)**2 + Math.cos(lat1_rad) * Math.cos(lat2_rad) * Math.sin(dlon_rad/2)**2 
    c = 2 * Math::atan2(Math::sqrt(a), Math::sqrt(1-a)) 

    rm * C# Delta in meters 
end 

puts distance [52.33816422, -106.2828899],[52.33816422, -106.2828634] 
# Will return the answer 

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