Methods for the Computation of Triangulation On the Grid System
Methods for the Computation of Triangulation On the Grid System
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Formulas will be de- duced for the difference between the coordinates of S and C, or AI and A. Suppose the reading on C to be r and on M to be r.
Figure 14, Vsc =VsM-(r r ). Jx=CD=SC sin CSD =L sin Vsc . Jy =DS=SC cos CSD =L cos Vsc- Then if we are computing the coordinates of S from those of C, or ys / v. , = Now, in the location by recoupement, suppose observations from M and N, known points, to be taken on C, the signal at the desired point. Then suppose with the instrument at S, the eccentr...ic station at the unknown point, the angle is measured between two known stations, as N and P. Now, let us find graphically the approximate point AI, for the center C, by intersection. By computing S from C as described above, the corresponding approximate point A is found for S, the instrument.
Then the computation is made by computing loci for S, as shown in the following: A locus containing S can be computed from the angle observed on N and P, by the ordinary three-point method of computation, using approximate point A.
What to read after Methods for the Computation of Triangulation On the Grid System?
You can find similar books in the "Read Also" column, or choose other free books by 29th United States Army Engineers to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Formulas will be de- duced for the difference between the coordinates of S and C, or AI and A. Suppose the reading on C to be r and on M to be r.
Figure 14, Vsc =VsM-(r r ). Jx=CD=SC sin CSD =L sin Vsc . Jy =DS=SC cos CSD =L cos Vsc- Then if we are computing the coordinates of S from those of C, or ys / v. , = Now, in the location by recoupement, suppose observations from M and N, known points, to be taken on C, the signal at the desired point. Then suppose with the instrument at S, the eccentr...ic station at the unknown point, the angle is measured between two known stations, as N and P. Now, let us find graphically the approximate point AI, for the center C, by intersection. By computing S from C as described above, the corresponding approximate point A is found for S, the instrument.
Then the computation is made by computing loci for S, as shown in the following: A locus containing S can be computed from the angle observed on N and P, by the ordinary three-point method of computation, using approximate point A.
What to read after Methods for the Computation of Triangulation On the Grid System?
You can find similar books in the "Read Also" column, or choose other free books by 29th United States Army Engineers to read onlineMoreLess
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