Google:

It’s been one year since the 7.0 magnitude earthquake struck Haiti, and governments and NGOs are continuing to respond, many using high-resolution images of the area. To support these efforts, we’ve updated our aerial imagery in Google Earth of the Port-au-Prince area to include images from before and after the earthquake, as well as made updates throughout 2010. These pictures provide an evolving view of the movement of people, supplies and rubble.

The imagery is available through Google Earth’s historical imagery feature. In addition, the New York Times has taken that imagery and produced an interactive map that allows you to see, very quickly, the differences at several key sites around Port-au-Prince before and after the earthquake as well as one year on (via @HodderGeography).