lab1 - 1/28/11 Principles of GIS Lab 1 questions 1. Define...

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1/28/11 Principles of GIS Lab 1 questions 1. Define latitude and longitude. Explain how lat/long is expressed and give a numerical example. Latitude lines, or parallels, run parallel to the equator and measure how far north or south you are of the equator. Longitude lines, or meridians, run from pole to pole and measure how far east or west you are from the prime meridian. They are expressed as measurements of angles rather than distances, as latitude is the angle between the point you are locating, the center of the earth, and the equator. Conversely, longitude is expressed as the angle between the meridian on which the point you are locating lies, the center of the earth, and the prime meridian. These angles are expressed in degrees, minutes and seconds, for example, 47” 25’39’ S is a latitude and 55” 12’27’ W is a longitude. 2. When you choose a map projection what element are you controlling? Your choice of map projection lets you control the type of distortion in a map for your area of
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This note was uploaded on 09/18/2011 for the course GIS 4043 taught by Professor Cshaw during the Spring '11 term at FAU.

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lab1 - 1/28/11 Principles of GIS Lab 1 questions 1. Define...

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