PLAN281 Lecture Notes - Lecture 3: Thematic Map, Georeferencing, Main Source
27 May 2016
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Document Summary
How to lie with maps - mark monmonier: geometric distortion and graphic generalization of data are unavoidable elements of cartographic representation. Cartographic abstraction: process of map making, 5 stages; Peer review" to see if your map makes sense and how to redesign/fix it. Selection: of the few features in the real world to include. Symbolization: to represent the different classes of features chosen. Definition: the ratio between distances on the map and corresponding distances in the real world (i. e. : ground distance) Expressed as: verbal statement: describes in words, representative fraction rf: proportion between map distance and ground distance, graphic scale: line or bar represents some set distance. Shows small area in great detail, e. g. 1:1,000: small scale map. Shows large area but little detail, e. g. : 1:250,000: scale controls degree of generalization. Influences what features are shown: how much simplification of feature shapes. Large and small scale distinction is based on the representative fraction.
