Generating polygons/building footprints

Discussion created by debhollon on Apr 25, 2012
Latest reply on Apr 26, 2012 by debhollon
Someone came to me and said "I saw someone do this; figure out how it works."  So now I am trying to figure it out.......

An aerial image of some sort (don't know the file type) was used as the reference layer.  A polygon footprint was drawn around each of a couple of the buildings.  A button was clicked and the remainder of the building footprints were generated.  It could be that it was just an image classification of a very large-scale image, but I don't know.  Does anyone know of another method that might generate a building footprint like that?

Thanks in advance.