No maps are accurate!

How can this be is my main question how can we be told that the earth is round and that certain Staes or country aren't really that big. How can this be? With all this technology and research we know why can't we figure this out? I want to know how we are able to make up theory sayin that we can just make it upside down or we can change the shape when it is flat on paper. Will we ever get to know the answer are we able to see the truth on if the world is actually like a clock? I do know that maps can give us great direction and help us when we are lost and don't know an address or place. What if emotion happens or the earth somehow becomes a knew form due to the weather or climate do we change the map to make it exactly how it looks every second or would we not be able to do that? Today we had also learned about longitude and latitude. Longitude is the areas on the north and South Pole. latitude parallels are to the equator and at the right angles. Maps aren't the most perfect drawn thing. They aren't even close to being perfect. So yes we should use these for where to go but not all of them are accurate which makes it not so easy to find the right one to use.