Lab 5 introduction(2).doc - Lab 5 Topographic Maps All of...

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Lab 5Topographic MapsAll of you probably use maps while driving, hiking, looking at sales data, reading about history,and much more.In this lab we will learn to work with topographic maps, which represent thethree dimensional surface of the Earth in two dimensions.If you hike in the mountains, theseskills can be lifesaving.If you own a home or property, the topographic data on a map couldaffect your property and the possible improvements you can or cannot make on it.Furthermore the concept of contour lines is widely used to display all kinds of data on maps,including crime rates, sales, population densities and a multitude of other important data.In geology, maps are used to document the features of the surface of our planet.We track thechanging courses of rivers, the movement of glaciers, even the size of landslides usingtopographic maps.Sometimes, the types of rocks that are found on the surface are plotted ona topographic map to create a geologic map, one of the fundamental tools of geology.To Bring to LabPencilLab ManualRulerCalculator1
5.1Introduction to Topographic Maps andContoursIntroductionTopographic maps record the elevation of the Earth's surface above mean sea level.Thisis actually quite a trick since they are reducing our three dimensional world to twodimensions.Bathymetric mapswork in exactly the same way, except that they recorddepth of water below sea level.ScaleMaps should all have ascale-- a measurement of how a map distance relates to actualdistance.This scale is described in several ways.One way is to place a bar on thebottom of the map on which various distances are marked.The second way is anumerical "proportion scale".

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Term
Fall
Professor
N/A
Tags
Cartography, Topography, Topographic map

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