GEOG 5 Lecture Notes - Lecture 3: Geographic Information System, Choropleth Map, Isoline (Opera)
Document Summary
The earth: oblate spheroid, diameter of equator 27 miles longer than north to south pole. Longitude: (meridians) east/ west: grid of latitude, longitude lines laid over earths surface is the graticule, used to specify any location on earths surface (degrees) c. Geographic information: comes with a location on the earth"s surface, stuff can store it, display it, analyze it, use it to make decisions. Originally just picked up visible light but now pucks up electromagnetic radiation that isn"t visible to the human eye. D. maps are powerful: properties that are difficult to be seen in the real world can be easily seen on maps, highlight relevant information, while downplaying irrelevant information. E. maps can deceive: selectively present information (can be good) a. Subway maps are very inaccurate but just show sequence: generalization roads and rivers often straighter; leaving out complexity, homogenizing regions a. Spatial behavior and interaction: contact between places.
