However, if you zoom in close enough to the airport you can also find the aerial images from 2010, which you can use.Īlthough you can't import the Google Earth historical imagery directly into ArcMap, there are instructions on the web that lead you through the process of bringing historical images into ArcMap as georeferenced pictures. Once you have that imagery displayed, you can compare those images to the aerial photos loaded in ArcMap / the satellite imagery in order to see which areas have changed (the closest imagery I found is 12/1999). However, there is another resource that you can use to help you select appropriate training areas-that is, Google Earth and the historical imagery that you can view.įor the Houston area, once you zoom into the airport ( here is a placemark for the airport), use the Google Earth time slider to select imagery close to the date of the Landsat ETM+ imagery (which was obtained on ).

In lab 4 you have been given instructions on how to load aerial photographs for Houston that you can use in your supervised classification.

Google earth historical images