UW-Madison GEOG 370 - Scale and Generalization (5 pages)

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Scale and Generalization



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Scale and Generalization

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Lecture number:
4
Pages:
5
Type:
Lecture Note
School:
University of Wisconsin, Madison
Course:
Geog 370 - Introduction to Cartography

Unformatted text preview:

GEOG 370 1st Edition Lecture 4 Outline of Last Lecture I Map projection mechanics a Aspect b Centering II Map projection distortions Outline of Current Lecture II The Power of Maps III Scale IV Generalization Current Lecture Scale and generalization The power of maps Maps abstract reality they are not reality itself Map an authored representation of geographic phenomena Representation A thing that stands for another thing Abstract representation a thing that stands for another thing and that retains only the information content of the original thing that is relevant to the purpose of the representation Maps are powerful because they abstract the reality they represent Never attempt to retain everything Example 1924 state of California commissioned a 3D terrain model of entire state About size of football field and height of person 20 million Realized it didn t help very much and got lost These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute A map that doesn t abstract is the same as wandering around on the earth and looking for yourself The cartographic problematic Place human imagination place We are constantly changing and wanting change which keeps geography going In order to create a abstraction of reality that makes complex geographic phenomena information useful and useable uncertainty is introduced into the representation and into the knowledge constructed from the representation as a necessary compromise Power comes from the abstraction but at the price of uncertainty Geography abstraction representation power uncertainty The challenge is finding the optimal degree of abstraction for your map purpose Which is why cartographers should be geographers first or they won t understand nature of the geography behind it Example American English dialects map shows that he wanted you to see all of it which leads you unable to read any of it Series of maps would ve even



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