Using street view for research

In my previous post I noted that the fact that the global deforesation map produced by Hansen et al has been placed on an interactive portal equipped with streetview and high resolution background imagery allows anyone to validate the results. One way the web portal could be enhanced would be to provide tools that allow…

Accuracy of Landsat derived deforestation maps

I have received a number of comments from colleagues working in Mexico and Central America regarding the accuracy, or lack thereof, of Hansen et al’s recently published deforestation map. Many of the comments regard the timing of deforestation. Pixels shown as recently deforested were often regarded by those with ground based knowledge as having been…

Quick analysis of forest fragmentation using the new global deforestation map

In my last post I looked at some general patterns of deforestation in Central America as shown by the recent publication by Mathew Hansen and collaborators. http://www.sciencemag.org/content/342/6160/850 The data are available for interactive browsing here. http://earthenginepartners.appspot.com/science-2013-global-forest The layers have been made public, and the authors anticipate widespread use of the information. However it will not…

New high resolution global forest change map 1

This week saw the publication of what may turn out to be one of the most influential products derived from processing Landsat imagery. Mathew Hansen of Maryland University and colleagues, including researchers working for Google, have pieced together a fascinating map of global deforestation over the last decade using the 28.5m pixel resolution imagery. http://www.sciencemag.org/content/342/6160/850…