You must establish the elevation of point B from point A (elevation 216.612 m). A and B are on opposite sides of a 12 lane highway. Reciprocal leveling is used with the following results: Station BS HI FS Elevation BM 130 0.702 188.567 TP 1 0.970 1.111 TP 2 0.559 0.679 TP 3 1.744 2.780 BM K110 1.973 1.668 TP 4 1.927 1.788 BM 132 0.888 Set up at A side of the highway: Rod reading on A = 0.673 m Rod reading on B = 2.416 and 2.418 m Setup at B side of the highway: Rod reading on B = 2.992 m Rod reading on A = 1.254 and 1.250 m
a). What is the elevation of point B?
b). What is the leveling error?