Clicking on a marker will bring up the image associated with that place. The direction of view is indicated by the color of the marker: North-Green, South-Blue, East-Red, West-Yellow. Satellite and Street View are also available. In places where there are lots of images, often because 360 degree views are made, you will need to enlarge the map to separate the nearly overlapping markers, usually of different colors.
Visit Professor Krieger’s website for additional information abut this project.