sturrock's maps for swaziland in southern africa, show where malaria cases have occurred, plus waterons temperatures and elevations. until now those facts have not been easy to analyze, even though the data has been collected. >> there are more large scale rainfall patterns and temperature variations that are really only available by using satellite information. we want to bring all that data to the hands of those people in the village. >> reporter: sturrock's maps rely on data, much of it photos, that have been, and still are collected by nasa satellites circling the globe. but that information, 40 years worth, has languished in government vaults in south dakota. now google earth engine has acquired it, for free, and is working with the university and many others to put it to work. for several years google has been storing data, trillions of measurements, on thousands of computers that it owns. but until recently, and even now, using that data and making sense of it has been difficult. with the power of thousands of google's computers at his fingertips, is combining the satellite pi