But your graphics and explanations all used a route from New York to Madrid. Wait, what happened to Greenland? When did we switch from New York to Madrid? This is 8th grade composition folks. That was bad enough, but then you even went so far as to show the straight line and great circle routes with the remark, “This paints quite a different story, doesn’t it?” The answer is, no, it doesn’t. The routes look almost the same. You could have used a graphic that would show the pronounced difference in straight and great circle routes over Greenland — which appears to be your standard — but you chickened out with an unconvincing New York-Madrid route.

The whole point of this was to explain great circle cartography, and demonstrate that graphically. But the opportunity was lost. I frequently hear about deficiencies in American STEM education. Then I see something like this, and I realize it may not be the fault of the students.

Hello! Thank you very much! My reply is a little late, but someone found my notebook before I lost it. I had lost your address; I only just found it by chance, and that’s why I’m replying now. Forgive the lack of courtesy, but I thought the address was only in the notebook.

Hi Victor. In this case, you can use these images. We are the creators of these graphics. Check out our guide how to cite – https://gisgeography.com/how-to-cite/

Please, can you report me if I can use it?. In case of yes, wich will be the conditions?

kind regards !!!

You’re definitely on the right path and to use a great circle.