. Map modeling in geography : including the use of sand, clay putty, paper pulp, plaster of Paris, and other materials : also chalk modeling in its adaptation to purposes of illustration. f useful material will then be limited only by theresources of the various homes represented in the school. Value of Relief-maps.—The objection is sometimes madeagainst the use of relief-maps that they do not correctly repre-sent the surface of the earth, since the altitudes, in comparisonwith horizontal distances, are of necessity very much exagger-ated. The same reasoning would prevent the civil engineer fr
. Map modeling in geography : including the use of sand, clay putty, paper pulp, plaster of Paris, and other materials : also chalk modeling in its adaptation to purposes of illustration. f useful material will then be limited only by theresources of the various homes represented in the school. Value of Relief-maps.—The objection is sometimes madeagainst the use of relief-maps that they do not correctly repre-sent the surface of the earth, since the altitudes, in comparisonwith horizontal distances, are of necessity very much exagger-ated. The same reasoning would prevent the civil engineer fromusing profiles to represent the elevations obtained in his topo-graphical surveys, for the exaggeration of elevation in the profileis exactly that which attains prominence in the relief-map. Thediagrams that geographers have long employed to represent ele-vations are sivn^ly profiles, and must be abandoned in all teachingif this objection to the relief-map is valid. But the fact is thatsuch objections are in reality baseless. We must seek after gen-eral concepts of continental outline and organization. The flat mapis, in respect to elevation at least, unmixed untruth; and even. h4ap Modeling in Geography. 15 the coast-lines in many places must necessarily be very imper-fect. Compare these shore-lines, as given in any school geogra-phy, with a topographical of a small portion of the shore ;the inaccuracy is seen at once, yet the value of the school map isnot in reality impaired. The general truth of oiitli?ie is impressed,and zve leave the details in their proper relation. So, in referenceto the third dimension of form, it becomes necessary to avoid theerror of the entire absence of elevation by the smaller error ofexaggeration. The apparently excessive prominence given tothe elevations in modeling is, however, exactly that which theeye gives to all objects when seen in their natural relation tothe horizontal distance. The height of any hill appears muchgreater than the
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Keywords: ., bookcentury1800, bookdecade1890, bookidmapmodelingi, bookyear1894
