auto flying

I just had a question about mapping and different uses i'm sure the answer is common sense however I wanted to be sure. Why would you use a single grid "Lawn Mower" style vs a Double Grid "Checkers board" style What does each provide that the other wouldn't? What is the pros and cons of...

Hi folks, Looking for some advice on whether the Mavic Air would be a suitable drone as a first purchase for my disabled son. He has no functionality in his right arm so trying to find a drone which is fairly automatic in its operation. I.e auto take off, flight and return using his own...