The center is the north pole.
Have you even looked at the flat earth map?
If you had you would know where the center is.
My mentioning of the word northern hemisphere is the public school indoctrination coming out.
Relearning everything I was taught as a kid is hard work. Brainwashing takes time to erode.
Flat earth can be measured as well.
Gravity is a good point to bring up.
If the world spun then gravity would be much stronger at the equator then the pole.
Technically the exact point of the poles would be zero gravity or darn close to it.
Gravity at the poles being zero. Nah. The gravity is in fact stronger at the poles due to the equatorial bulge. The equator bulges because a spinning body has a force exerted on it due to its rotation. This cause it to form a oblate spheroid rather than a sphere. Therefore the distance from the equator is slightly larger than the poles. Gravity weakens with distance so this variation in distance causes a slight variation in the gravitational pull on objects in that area. This difference is very low but can be measured (It has been measured). The gravity is slightly stronger at the poles compared to the equator. This has been measured and the measurements show that. How is it possible if the Earth is flat? Doesn't the flat Earth mean the equatorial bulge doesn't exist? This means that the gravity is the same. But it isn't. Also the gravity is not zero at the poles because of spin. Gravity is a warping of space-time due to the mass of an object and all the observers would feel gravity from that object. Gravity is felt at the poles otherwise people who visited the poles would have jumped for joy and never returned. They would have just floated off. They didn't by the way. The poles are at a point where spin doesn't really make a change of scenery but this doesn't mean a change in gravity. What evidence do you have to show that it is zero or close to it.
You say the north pole is at the centre. You do know that a compass follows this. So if I go from my home in England and follow a compass north I will go over Antarctica and reach the USA ( I looked at a flat earth map for that). The USA is west of England. So if I reach the north pole and kept going north ignoring the compass I could go on a nice vacation in the US. Good tip.
Finally, a "public school indoctrination." Society is not that messed up. I mean if someone were to grow up dreaming of becoming a NASA employee as a physicist, they would learn all this stuff in university and school and find it all to be a lie. Someone would have said by now through anger.