t3 - Geography 231 Introduction to Geospatial Methods Topic...

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1 Geography 231 Introduction to Geospatial Methods Topic 3: Geographic Phenomena and Data I: Representing Geography Goals for This Topic Introduce the concept of geographic representation Understand the concepts of fields and objects First cut at raster and vector data models Introduce Lab 1
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2 Communicating Geographic Information The world is a complex place, and we can only observe a very small part of it Almost all human activities require knowledge about the earth Information is communicated through language, words, and symbols Models that represent the real world Representations Are needed to convey information How would you communicate a concept of pH? Fit information into a standard form or model Discipline or culturally defined Always simplify the truth that is being represented The world is too complex to communicate
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3 Representations Occur: In the human mind, when information is acquired through the senses and stored in memory In photographs, which are two-dimensional models of light received by the camera In written text, when information is expressed in words In maps, when information is selected and graphically displayed with marks on the page In a GIS, through the selection of entities and attributes What is your view of the world?
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4 Geographic Representations Geographic representation typically deals with the Earth’s surface Among the oldest and most important forms of human knowledge Key problem: the world is infinitely complex!
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This note was uploaded on 02/04/2010 for the course GEOG 158 taught by Professor Dobson,j during the Spring '08 term at Kansas.

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t3 - Geography 231 Introduction to Geospatial Methods Topic...

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