Topographic maps and sketch mapping . rawn by eye. It will be noted that the small map could be enlarged tothe larger scale by drawing simply the outlines of one milesquares and sketching in the details from the map to theenlargement by This would give a rough enlargement,but by dividing both the map and the enlargement intosmaller squares the errors due to enlargement by the eyealone are reduced and such errors as do occur are practicallylimited to minor discrepancies in the smaller squares. EXERCISE 1. Select any square mile of Fig. 13 and enlarge this portion of the figureto a scale o
Topographic maps and sketch mapping . rawn by eye. It will be noted that the small map could be enlarged tothe larger scale by drawing simply the outlines of one milesquares and sketching in the details from the map to theenlargement by This would give a rough enlargement,but by dividing both the map and the enlargement intosmaller squares the errors due to enlargement by the eyealone are reduced and such errors as do occur are practicallylimited to minor discrepancies in the smaller squares. EXERCISE 1. Select any square mile of Fig. 13 and enlarge this portion of the figureto a scale of 1: 10,000 as described above. Give all computations onthe reverse side of the drawing. CHAPTER IIFLAT MAPPING Art. 22. Surveying and Mapping Surveying, of which mapping is a part, consists in makingsuch measurements between various points on the groundas are necessary to plot the relative position of these pointsin the form of a map. Thus in making a map we want to showthe location of houses, roads, etc., and this is done by deter-.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectcartogr, bookyear1920
