Drawing Scene when viewed from above?

Well, stand up on a chair or table and look down. You only see the tops of things - it's more about simple shapes. Now, drawing from high above doesn't have much to do with linear perspective as it does visual perception. Do this, place a few objects on the floor and climb up on a chair and look at them from a height. Or if you live in a house with two stories and have a place you can look down from higher up do that - and if you can access a building with a place where you can look down, that's a good place to go. Start by looking. See that you aren't seeing objects as much as you are seeing shapes. You can't make up this kind of drawing you have to see it. For some things you will be directly above and will only see shapes. For other you will be seeing them at a steep angle. Look at the shapes, the direction the lines take, the thickness and depth of the shapes. Keep in mind, these are no longer objects you know so you can't look at them as objects, but look at them only as shapes.

First, the word is "perspective."

Second, to visualize what you might see, stack some boxes, books, etc around a chair and stand on it, looking down.

Perspective works the same way, whether looking down on something or, looking straight out at something. The closer objects to your eyes appear large than the far end of the same object, or of objects that are further away.

Vanishing points also work the same way. The paralell lines of an object, such as the edges of a box, will all point to the same "place," which is an imaginary point, whether or not it is on a horizon. As long as your stacks of boxes stand up straight, the lines will all be directed to the same vanishing point.

Look in to "3 point perspective," I believe that is the method for making convincing birds eye view/worms eye view drawings. There are likely plenty of websites that have tutorials.