ch02 - Chapter 2: Navigating GIS Learning and Using...

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Chapter 2: Navigating GIS Learning and Using Geographic Information Systems: ArcExplorer Edition
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 2 Objectives Learn how features are located on maps using coordinates Understand the role that geographic scale plays in map detail Learn about projecting the spherical world onto flat maps Work with map layers in ArcExplorer Change map scale and move around in a GIS map view
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 3 Objectives (continued) Measure map features Use ArcExplorer to change map projections
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 4 Map Navigation Map extent Rectangle on earth corresponding to the boundaries of a map Defined by two pairs of map coordinates, the lower-left and upper-right corners of the rectangle Full extent The maximum extent for the map layers in your GIS Current extent Zoomed portion of the map on your computer screen
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 5 Geographic Coordinates Rectangular coordinates Used for locating an intersection on a flat sheet of graph paper or a flat map X, Y coordinates Figure 2-1. Rectangular coordinates
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 6 Geographic Coordinates (continued) Geographic coordinates Spherical coordinates Angles of rotation of a radius anchored at earth’s center Latitude and longitude
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  Learning and Using Geographic Information Systems: ArcExplorer Edition 7 Latitude and Longitude Great circles A circle on the surface of the world that has the radius of the world Meridian Great circle that passes through the poles
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ch02 - Chapter 2: Navigating GIS Learning and Using...

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