the延伸內容
Dear Thanks for your useful info. I really appreciate that. :-)
航空公司的里程計算是以地球的Great Circle Distance (http://en.wikipedia.org/wiki/Great-circle_distance)的來算.所以你會發現每一家航空公司同樣點與點的哩程數都是一樣的.以下網站可以幫你算出點與點間的里程. http://gc.kls2.com/ 不過實際飛行不一定會照著那個路徑飛.因為還會根據風速氣候等其他條件做調整.
Do anyone guys know how to measure the distance between two locations for flying??