SUBCOURSE EDITION - Modern Prepper

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INSTRUCTIONAL CONTENT1. The term "control" used in mapping, refers to the established system of coordinated data, whichdetermines both the horizontal and vertical positions of specific points or features on the earth's surface.Control is necessary to tie the features on the earth to the UTM grid and geographic coordinate systems,and to establish the elevation of the terrain. Without control it would be extremely difficult, if notimpossible, to prepare an accurate map. Control points are plotted from DA Form 1959 (Description orRecovery of Horizontal Control Station) on a grid and projection base so that the map compiler canaccurately compile maps. During this lesson you will learn how to read and interpret the data from theDA Form 1959 necessary to plot control.2. DA Form 1959 Components. DA Form 1959 is used by the geodetic surveyor to record theprecise location and description of horizontal, and vertical control points. These forms are normallypublished in book form (known as trig lists) for a map sheet or sheets. The trig list is normallyfurnished to the cartographer as source material. The cartographer then plots, symbolizes, and labels allcontrol points contained in the trig list. Before continuing, examine the DA Form 1959 in figure 5-1 sothat you are familiar with the format of the form. The items highlighted are those items needed to plotgeodetic control.97
Figure 5-1. Completed DA Form 1959 for station "Adams."a. Heading (fig 5-2). The heading information provides the form user with identifying dataabout the control points such as the country in which they are located, the type of marker used to locatethe points, the control station name, the area the control points are in (city, county, province, or mapsheet number), and the agency who surveyed the control points.98
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SUBCOURSEEDITIONEN5302 6US ARMY ENG
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PAGELESSON 5 - GEODETIC CONTROL....
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GRADING AND CERTIFICATION INSTRUCTI
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INSTRUCTIONAL CONTENT1. During your
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Figure 1-2. DA Form 1941 heading.b.
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d. Grid Size (fig 1-4). Now that yo
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c. When determining the number of g
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REVIEW EXERCISESNow that you have w
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Figure 1-5. Completed DA Form 1941.
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EXERCISE SOLUTIONS1. C, 125 (para 3
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INSTRUCTIONAL CONTENT1. Now that yo
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Step 3: Determine the approximate c
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Figure 2-5. Swing centerline arc.d.
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Divide the results by 2:of the grid
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Step 10: Construct the four corners
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a. Using the invar scale and beam c
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Step 14: Set the dividers or compas
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Figure 2-19. Grid labels.This compl
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4. You have found the center of the
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LESSON EXERCISE RESPONSE SHEET1. __
Page 42 and 43: LESSON 3 - PROJECTION COMPUTATIONSO
Page 44 and 45: 44Figure 3-1. Completed DA Form 194
Page 46 and 47: (3) The equivalent UTM grid values
Page 48 and 49: Figure 3-4a. Southwest corner.Figur
Page 50 and 51: 50Figure 3-6. DA Form 1932.
Page 52 and 53: a. Heading (fig 3-7). The heading i
Page 54 and 55: 54Figure 3-9. Line showing 38° 30'
Page 56 and 57: (10) The graticule tick 38° 30'W l
Page 58 and 59: 58Figure 3-12. DA Form 1941 (Phoeni
Page 60 and 61: 60Figure 3-13. DA Form 1932 (Phoeni
Page 62 and 63: LESSON EXERCISE RESPONSE SHEET1. __
Page 64 and 65: LESSON 4 - MAP PROJECTION CONSTRUCT
Page 66 and 67: 68Figure 4-1. DA Form 1941 (Virgini
Page 68 and 69: corner, you always plot the distanc
Page 70 and 71: Step 4: The intersections formed by
Page 72 and 73: Step 6: The intersections formed by
Page 74 and 75: Figure 4-11. DA Form 1932.Step 3: E
Page 76 and 77: Refer to the DA Form 1932 (fig 4-12
Page 78 and 79: Step 6: Graticule ticks are plotted
Page 80 and 81: The intersections formed by the 1.2
Page 82 and 83: Step 2: Drafting graticule ticks (f
Page 84 and 85: REVIEW EXERCISESNow that you have w
Page 86 and 87: Figure 4-22. DA Form 1941 (Ft. Belv
Page 88 and 89: Figure 4-23. DA Form 1932 (cont).91
Page 90 and 91: EXERCISE SOLUTIONS1. B, 0872 (para
Page 94 and 95: Figure 5-2. Heading information of
Page 96 and 97: Figure 5-5. Bottom of DA Form 1959
Page 98 and 99: 4. What are the centimeter plotting
Page 102 and 103: LESSON 6 - PLOTTING GEODETIC CONTRO
Page 104 and 105: 112Figure 6-1. Completed DA Form 19
Page 106 and 107: Step 3: Plot the easting value of t
Page 108 and 109: Step 7: Connect these two arcs with
Page 110 and 111: REVIEW EXERCISESNow that you have w
Page 112 and 113: Figure 6-10. Completed DA Form 1959
Page 116 and 117: Note: The following material is an
Page 118 and 119: d. Although Greenwich, England, is
Page 120 and 121: (3) Lambert Conformal Conic Project
Page 122 and 123: 4-7. Identification of ControlIn or
Page 124 and 125: For example, if one end of the comp
Page 126 and 127: horizontal lines, and then repeated
Page 128 and 129: . To plot the geographic coordinate
Page 130 and 131: (1) First, determine the correct sp
Page 132 and 133: (5) Note that for each 5 minutes of
Page 134 and 135: 4-13. Plotting Positions of Control
Page 136 and 137: 5. What is the value of the first f
Page 138 and 139: PART II - CONSTRUCT MAP PROJECTIONR
Page 140 and 141: Requirement: Questions 16 through 2
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20. Refer to question 19. From whic
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154Figure 3. Completed DA Form 1959
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LEAVENWORTHU.S. GOVERNMENT PRINTING
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SUBCOURSE EDITION - Modern Prepper

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