GEOG 1HB3 Lecture Notes - Lecture 4: Contour Line, International Date Line, Geographic Information System
18 Apr 2016
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Document Summary
Distance between the cities (closer together = more interaction) Maps are 2d graphical representations of the world, & depict spatial relationships. Property plan of home which depicts the boundaries between you and your neighbour. Projection: mathematical technique for representing a 3d sphere on a 2d map. 3 main kinds of projections exist - each w/ their own advantages and limitations. Main forms of distortion are: distance, direction & area (cylindrical, The earth"s surface is projected onto a cylinder that just touches the outside edges of the globe (usually at the equator ) Accuracy is greatest at the equator, and declines as you move towards the poles. The earth"s surface is projected onto a cone that touches the outside edges of the globe (in the mid-latitudes, i. e. 30 degrees - 60 degrees n/s) The earth"s surface is projected onto a flat surface that touches the globe at one point only (usually polar regions)
