StudyGuide-Exam1-10 - GEOG 170 – Study Guide: Exam 1...

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GEOG 170 – Study Guide: Exam 1 Spring 2009 Each lecture is summarized below by key ideas and overall themes; also included are questions you should be prepared to answer. Students will need a #2 pencil and calculator for this exam. Students will not be allowed to use the calculators in their cell phones or PDA’s. Class 1: What is a map? What defines a map? What are some characteristics of maps? Recognize the two general categories of maps: Reference vs. Thematic § What does each emphasize? Could you recognize examples of each? Basics of Geospatial Data Class 2: Size & Shape of Earth Identify/Explain the 3 different models for representing the shape of the earth § Know relationship between #D model & size of mapped area Understand the properties of spherical graticule; What is a great circle? Know characteristics of latitude & longitude What are geodetic coordinates? What is a horizontal datum? Vertical datum? Different model of earth = Different lat/long coordinates Class 3: Map Projection Basics What are projections & what four properties of a globe are distorted when projecting to flat surface? Two things are needed to create a map… Know the three basic surfaces used to construct projections What is the importance of the line/point of tangency? Projection surface have two main properties: Tangency and Orientation § What is difference between normal & transverse? How does choice of orientation related to mapped region? § What is difference between tangent and secant? Know what is meant by conformal, azimuthal, equal-area (equivalent) and equidistant projections Know the properties of the Mercator projection What are compromise projections? Understand how we select projections – Depends on purpose of map & location of region; What projection we would choose for Chile versus US; What projection we would choose for navigation versus mapping geographic distributions? Classes 4-5a: Coordinate Systems & Global Grids Why do we need coordinate systems? (Why don’t we just use geographic coordinates?) What is a coordinate system? Universal Transverse Mercator (UTM) System
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This note was uploaded on 09/14/2009 for the course GEOG 120 taught by Professor Williams during the Spring '07 term at Wisconsin.

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StudyGuide-Exam1-10 - GEOG 170 – Study Guide: Exam 1...

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