Slide 1Fig 2-2a, p.33

Slide 2 Fig 2-14, p.42

Slide 3Fig 2-7, p.36

Slide 4 Fig 2-13, p.41

Slide 5 The Global Positioning System (GPS) The Global Positioning System consists of three parts: 1) Earth orbiting satellites, 2) control and monitoring stations across the Earth, and 3) GPS receivers owned by individuals. A set of 24 satellites orbiting the Earth every 12 hours broadcasting their position and time. A ground-based receiver listens to the signals from four or more satellites, comparing the time transmissions of each with its own clock. Given that signal travels at a known rate of speed, the receiver can calculate the distance between the satellite and receiver. Combining the position of the satellite at the time of transmission with the distance, the receiver is able to determine its location. GPS is being employed in a variety of ways. GPS is widely used for ground, air, and sea navigation. It is used to produce highly accurate maps and record land deformation caused by earthquakes and volcanic eruptions. GPS is showing up in a number of commercial products available to the public from standalone units to automobiles, cellphones, and digital cameras interfaces. A popular use of Gps units is geocaching, a high-tech "treasure" hunting game.geocaching

Slide 6 GIS  A geographic information system  is a computer-based technology that enters, analyzes, manipulates, and displays geographic information.  It is a marriage between computer-based cartography and database management.  What is GIS? – by ESRIWhat is GIS? 

Slide 7

Slide 8 The bottom transparency is the most important as it has the coordinate system (latitude and longitude)  upon which we can align or register the other layers of information.  The second layer is a map of industrial sites,  the third shopping centers and so on.  By layering the information one on top of the other, a geographer can show the relationship and degree of connectivity between various land uses and transportation routes. GIS City of Santa Clarita