Topographic Maps and Sketch Mapping

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John Wiley & Sons, Incorporated, 1920 - Cartography - 175 pages
 

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Page 67 - BI includes a short horizontal line between stanzas 1 and 2, 3 and 4, 5 and 6, and 7 and 8.
Page 161 - The Geological survey is making a topographic map of the United States. The sheets of which it is composed are projected without reference to political divisions, and are designated by some prominent town or natural feature found on them ... A description of the topographic map is printed on the reverse of each sheet.
Page 42 - We prefer to use the term scale only in its cartographic sense, ie, as the ratio between a distance on the map and the corresponding distance on the ground.
Page ix - The experienced map reader will see in his mind's eye, a small town on the south slope of a hill in a diversified country. Definition of a Map. A map is a graphical, conventionalized representation to scale on a sheet of paper, of a portion of the earth's surface as seen from directly above. When we say graphical, we mean that the information concerning the ground or terrain is conveyed by a picture or drawing instead of verbal description. When we say conventionalized, we mean that the various natural...
Page 44 - The actual relation between the scale and contours of a map, and the ground represented cannot be taught from books. It comes only from actual practice in using a map in the field where it can be compared with the ground, and the student gradually acquires the ability to picture in his mind the ground represented when looking at a map.
Page 18 - The slope of the hill is indicated by the thickness and spacing of the individual hachure lines. A steep slope is indicated by heavily inked lines very close together.

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