SgnYear [统计年度] - null
ProvinceCodeA [省会A代码] - null
ProvinceNameA [省会A名称] - null
ProvinceCodeB [省会B代码] - null
ProvinceNameB [省会B名称] - null
DistanceBetPC [省会间距离] - 计算两点间距离:记两点经纬度分别为:(LonA,LatA),(LonB,LatB)。R=6371KM,pi=3.14Distance=R*Arccos(C)C=sin(LatA*Pi/180)*sin(LatB*Pi/180)+cos(LatA*Pi/180)*cos(LatB*Pi/180)*cos(LonA*Pi/180-LonB*Pi/180)