Professor Robert Gilmore Pontius Jr creates quantitative methods that contribute to Geographic Information Science (GIS) and Remote Sensing. Pontius is an applied statistician and environmental scientist with expertise in GIS, ecological modeling, and land change science. The applied nature of his diverse activities has inspired him to derive mathematical proofs for generally applicable concepts concerning measurements that are essential in GIS, Remote Sensing and other fields. He has presented his ideas in ways that have persuaded the professional culture to shift. Several of these methods have been incorporated into the GIS & Image Processing software Idrisi, which has over 100,000 users worldwide. Clickhere to see his recent video concerning land change modeling.