A special set of 250 Nepal maps produced by the Survey of India from 1957 to 1975, at a scale of 1 inch per mile (63, 360). These maps were based on 1:40,000 scale aerial photographs taken between 1956 and 1958. Terrain is represented by contours at 100 feet intervals, with hill shading. The naming convention for these maps is the same as that used by the Survey of India for other South Asian maps. The number of the 4 degree x 4 degree block is given first, followed by the letter (A to P) of the sixteen 1 degree x 1 degree blocks in each 4 degree block eg. 38 D, and this is followed by a "]" symbol to indicate a slash and then a number from 1 to 16 to indicate the number of the map in the 1 degree block. This Number Letter Number designation is followed by the word 'Nepal' to indicate this is part of a special set of Nepal maps, and then comes the date of publication in parenthesis. Two different index maps are provided. The first with the title "0 Nepal 63k map Index" is taken from Harka Gurung's Maps of Nepal. A second index with the title "0 Index to One Inch Sheets of Nepal by Survey of India" provides a colour coded indication of the source of various maps.