https://www.flightradar24.com/
http://www.marinetraffic.com/ee/
http://postscapes.com/real-time-air-and-marine-traffic
2D LCS 定義圖形相似的公式
Fixed-gap LCS
http://www.marinetraffic.com/ee/
http://postscapes.com/real-time-air-and-marine-traffic
2D LCS 定義圖形相似的公式
Fixed-gap LCS





