CONS 127.pdf

# CONS 127.pdf - CONS 127 On canvas at ​3:45 pm​ Exam...

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CONS 127 On canvas at 3:45 pm . Exam style; Multiple choice and short answers (4 to 5 lines). You can’t change your answer once you write it. Final Study Questions: Lecture 2 – Attributes of Position What is latitude and longitude ? Latitude : the angular distance north or south of the equator or, angle that describes the north-south position Longitude : the angular distance east or west of the prime meridian or, angle that describes the east-west position Where is the prime meridian ? Prime Meridian (Greenwich) : Origin of the measures of Longitude (zero degrees of longitude). What is a parallel ? Parallel: circle connecting all locations with a given latitude. What are the three ways the earth’s shape can be mathematically defined ? Sphere, Ellipsoid and Geoid What is the only correct representation of the Earth’s surface ? Geoid What is the main difference between an equivalent and conformal projection ? Equivalent (Cylindrical) - distortion of area ( continents or country ) , angles are preserved Conformal (Conic) - distortion of shape ( continents or country ) , areas are preserved

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*Planar – Equidistant: ● All distances from a point (the projection center) are correct. ● Distances between any other points are incorrect. ● Convenient for radio communications, radar. ● Example: Azimuthal equidistant *Compromise: ● Balances the distortions of shape and area ● Produces visually appealing maps ● No metric properties: areas, distances, and shapes cannot be measured. ● Examples: Robinson. Considering the case of Africa and Greenland, describe how map projections might influence the perspective of the map viewer. By distorting these landmasses it creates a warped view of the earth by giving higher importance to these showing the bias of the creator.
Lecture 3- Distance and scale 1. How was a metre first defined? Ans: Metre (first) -“one ten-millionth of the distance from the equator to the North Pole” 2. How is Metre defined now ? Ans: Metre (now) - Length of path travelled by light in vacuum during a time interval of 1/(close to 3 millionth) of a second. OR Today, the meter is defined to be the distance light travels in 1 / 299,792,458 seconds. 3. What is the name of the unit which is equal to 1000 nm ? Ans: Micrometer 4. Which covers more area, a small or a large scale map ? Ans: Small scale covers more area than large scale map. 5. What are two ways scale can be indicated on a map ? Ans: (i) Ratio: eg. 1 cm: 50,000 m (ii) Graphic scale/ Bar scale: shows how much a distance equals Also (iii) Verbal Scale 6. What kind of map scale would be appropriate for representing large countries and/or continents? For a city neighbourhood? Ans: Large countries/ continents- Small scale, (eg. Continental 1: 20,000,000); A city neighbourhood- Large Scale (eg. Neighbourhood (1:15,000)).

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• Spring '16
• Carroll
• Global Positioning System, Metre, Global navigation satellite system

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