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Several on the list are non-profit organizations, but GIJN also has learned that some of the largest commercial firms are prepared to help journalists and provide images (see below). This GIJN resource includes ten places to go for pro bono help and free images, including high resolution images. Examining images can complement other research, possibly providing corroborating evidence. Imagery, as one expert put it, “is independent of the official line of thinking.”Īmong other benefits, images are great for showing change over time, such as retreating shorelines, growing islands or lost vegetation. There is real potential for investigative journalists to make greater use of these space images, although they have used them to report on conflicts, climate change, refugees, forest fires, illegal mining, oil spills, deforestation, slavery and many other topics. The satellites revisit each spot on the globe about once a week.Satellite images are powerful tools for discovery and analysis, plus provide vivid illustrations. When the software detects a change - when trees have disappeared from a particular spot since the satellite last looked at it - it issues an alert, and a color-coded spot shows up on the map where trees appear to have vanished. Behind the scenes, computers sift through a flood of images collected from satellites, day by day, using techniques devised by researchers at the University of Maryland and Wageningen University in the Netherlands. It looks a bit like Google Maps, except that this map is updated constantly. She zooms in on one small area of the Central African Republic. Mikaela Weisse, who helps run this site, demonstrates how it works. The website makes it possible to monitor what's happening to distant tropical forests almost in real time through satellite imagery. 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