How does google maps knows that there is a road over this place i mean we have roads all covered with dense trees so if they use satellite’s, the satellite’s hardly can see a road from top, so how do they figure out?

Question

How does google maps knows that there is a road over this place i mean we have roads all covered with dense trees so if they use satellite’s, the satellite’s hardly can see a road from top, so how do they figure out?

In: 4

Answer 1

The Department of Transportation.
Each state has one, and is responsible for mapping out all the roads.
Federal also has a Department for the same thing.