1. A system comprising: a computer processor configured to: receive a two dimensional aerial digital image of an area; identify one or more circular tanks in the area; identify one or more vegetation areas in the area using color information in the digital image; identify one or more process areas using edge patterns; identify one or more remaining areas as building areas; concatenate the one or more tank areas, the one or more vegetation areas, the one or more process areas, and the one or more building areas to form a second digital image; create one or more polygons, each polygon encompassing a tank area, a vegetation area, a process area, or a building area in the second digital image; and display the second digital image on a computer display device.