Click the image to zoom in, & use the controls: the top triangle is a zoom slider, the arrows pan the image, drag the upper-left red box to navigate, click-hold and drag the mouse to move around the image, the right circle resets image.

On a PC you can right-click the image and zoom in even more, but you lose the lower control panel. On a Mac it's control-click, apple-click, command-click (refresh the page to reset everything).

What you are looking at:

6000 x 6000 pixel base image, 6000 feet on a side (over a mile).

Resolution is 1 foot per pixel.