Use of aerial photographs in the study of watershed characteristics

Identifying opportunities to improve digital soil mapping in India: A systematic review

“…Before the 1980s, Indian soil survey systems remained confined to field and laboratory based methods rarely being associated with photointerpretation of aerial photographs (Sharma & Kalia, 1987). Subsequently, digital satellite imageries such as LANDSAT TM (Manchanda and Hilwig, 1981), IRS-1A LISS II (Kudrat et al, 1992), and IRS-1C/1D LISS-III were used to delineate physiographic boundaries of small cartographic scale soil resource maps (Manchanda et al, 2002).…”