Next we will look at images, and how that data can be useful. You should now see the aerials on the map view. Color-Infrared photography is useful to identify natural features on the ground, such as wetlands and forests. Notice the scalebar on the bottom of the map view as you zoom in and out. The numbers change with your zoom, meaning you are changing the map scale as you zoom in and out.
Maps are models of the earth, like a globe in a classroom.
If we zoom in to the photos far enough, we can begin to see the pixel size, or resolution. Both these digital photos are stored as a bunch of little squares of color or grey. When you are zoomed in close enough to see the individual pixels clearly, notice the map scale on the bottom. Obviously, we can zoom in far enough so that the photos are not much use for identifying features on the ground. When we zoom back out, though, we can start to recognize things like roads and houses again.