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LAMBERT CONFORMAL CONIC projection - 14070_196
CHAPTER 10 ENGINEERING AND LAND SURVEYS - 14070_199

Engineering Aid 1 - Advanced Structural engineering guide book
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directions.  However,  the  distance  scale  that  applies  to the whole map is exact only at the standard parallels, as shown in figure 9-26. Between the parallels the scale is a little too small; beyond them, it is a little too large. The discrepancy is small enough to be ignored in  work  of  ordinary  precision  or  less.  For  work  of higher precision, there are correction factors that may be  applied. The  Lambert  conformal  conic  projection  is  the base for the state coordinate systems devised by the Coast  and  Geodetic  Survey  for  zones  of  limited  north- south  dimension  and  indefinite  east-west  dimension. For zones whose greater dimension is north-south, the Coast   and   Geodetic   Survey   uses   the   transverse Mercator   projection. Q1. Q2. Q3. QUESTIONS Which one of the wingnuts, labeled A and B, in figure 9-27 permits a leveled plane table to be rotated in azimuth? Assume you are using three-point resection to plot the location of point P and the triangle of error is inside the main triangle formed by the three  known  points.  Where  in  relation  to  the triangle of error is point P located? What point-location method can you use to run a  traverse  using  a  plane  table? 9-23 Figure 9-27.-Cross section of a plane-table tripod head. Q4. Q5. Q6. Q7. Compute the missing column entries for point 5 in figure 9-8. Why is transverse Mercator projection the pre- ferred projection method for use with the mili- tary grid reference system ? Refer to figure 9-14. What is the complete desig- nation  for  the  first  full  square  east  of  meridian 168°W and south of the equator? Measured along any meridian, what is the ap- proximate  distance  in  statute  miles  between 16°30’N latitude and 0°30f$ latitude ?







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