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?

599 views
0 Comments

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

11 Answers

1 2
Anonymous 0 Comments

Difficultly. This whole field of map data is called “GIS” (Geographic information system) and it comes from all sorts of sources.

For most roads, they get survey data. The people who planned and built the road have an idea of where they wanted it and where they put it. Sometimes the two are even the same.

For tree-covered areas where satellite sources won’t work, they could also drive car through it (or your car, since you’re carrying a google phone and it’s phoning home) and record the GPS data.
1 2