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Google, a corporate entity known for gathering information of all sorts, has attained a remarkable synthesis of geographic, visual, and historical data in its GIS interface, Google Earth. GE can float its users across the globe at impressive speeds and terrifying angles of approach. Google Earth Desktop Pro is still its best product, and the one that we will use. This freeware can perform complex functions including the import and export GIS data, placement of hyperlinked and illustrated pins, paths, and image overlay and geo-referencing of historical maps. GE also has a “time slider” and can go back in time with historical imagery. Available on PC, Mac, or Linux.