大圏航法と航程線航法の概要

地球儀と平面図というイメージを保つことが大事と伝われば良いなと思ってます。

よければYoutubeチャンネルも見てください。

Measuring with a globe and measuring with the Mercator projection can only be understood if the image is well preserved.
It is a video that I hope to convey such an image.
Check out my Youtube page if you like.

I used Google Translate.