Surveying Vol. 1 " by S.K. Duggal is a standard textbook for civil engineering students, and "PDF 42" likely refers to of a digitized version. In standard editions, this section typically covers Linear Measurement with Chain or related horizontal measurement techniques. Core Subject Matter
: S.K. Duggal, a retired professor from MNNIT Allahabad with over 34 years of teaching experience. : Known for a point-wise pattern Sk Duggal Surveying Vol 1 Pdf 42
: All measurements are referenced to a known datum, which could be a local arbitrary datum or a national geodetic datum. Surveying Vol