Uploaded on 2015-04-20 by tmlisapo

[1]: https://edxuploads.s3.amazonaws.com/14295372824781683.jpg This is a picture of taken in greenstone Johannesburg. Visible items include cars and building infrastucture. Invisible Items include Patterns of cars, ie times between 08:00 and 17:00 hours the flow is completely different, Also in the back ground you can see a power plant, but from the picture you can not deduce how much electricity is generated in that plant.They are people working in the buildings and all that is data we need to know as well.