. Military sketching and map reading. critical points of the area in question. Find thevisible portions of these lines by method suggested above, andconnect their extremities, and you have approximately thevisible area. (See Fig. 18.) If the student is provided with a well-contoured map, somecross-section paper, and a pencil, he should be able in an hourstime, by the careful study of this lesson, to master the subjectof visibility. Review Each student should be given a contoured map, and requiredto solve the following problems: 1. To determine the visibility of a point by observation. 2. To de
. Military sketching and map reading. critical points of the area in question. Find thevisible portions of these lines by method suggested above, andconnect their extremities, and you have approximately thevisible area. (See Fig. 18.) If the student is provided with a well-contoured map, somecross-section paper, and a pencil, he should be able in an hourstime, by the careful study of this lesson, to master the subjectof visibility. Review Each student should be given a contoured map, and requiredto solve the following problems: 1. To determine the visibility of a point by observation. 2. To determine the visibility of a point by proportion. 3. To determine the visibiUty of a point by the profilemethod. 4. To determine the visible portion of a straight line bythe profile method, the point of observation being in the samestraight line. 5. To determine the visible portion of an irregular line, suchas a crooked road, the point of observation being outside theirregular line. 6. To determine the visible portion of a given ? ? ^ ^ ??• ? ^ ^ /^\^_^ ^^^-^ ^nT^^^--^ %?s>—=:r i=l -^ Z^ -—-Z ? ^^^J^^s\. ::^N^^v\oO* ^^$$^$^.?^\ ^^^:^^^^ ^ o^°5-,°\ \ yvj )^ ^^)/JJ)/y^i^ ^^^^yw///y^ x^y^/ 11 // /y y^// //// —^yJJ/y/ -ii^^v/V// ^^^^^V/V/ =^^^^^^^^$-^^/x; - <:::^^-^^^<:^/ <?^^:^^o^ Vy^^^^^^^^ C<^X y X j/0»^A / r_,^i) J/ -vy/ -_^X —-^ ^?o^ -700 -s^o^ .oB ^0*
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectmilitarytopography
