Geographic information systems (GIS), once used predominantly by experts in cartography and computer programming, have become pervasive in everyday business and consumer use. This unit explores GIS in general as a technology about which...

The Great Pacific Garbage Patch (GPGP) is an interesting and somewhat publicized environmental problem. A swirling soup of trash up to 10 meters deep and just below the water surface is composed mainly of non-degradable plastics. These...