Notes/Description |
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Orthography is in accordance with Bombay Government Official List (Bombay Places and Common Official Words).
Conventional Signs. Trigonometrical Stations ▲ Intersected Points and Traverse Stations ○ State Boundaries ~~ Edge of Forest Clearances ☁ Heights above mean sea level determined trigonometrically thus, 398 Barometric heights above mean sea level thus, 390 B, Approximate heights thus, 491 Ap, Hill Shading strokes are in four grades thus ▒ ▒ ▒ ▒ representing respectively vertical intervals of 36, 24, 16 and 10⅔ feet approximately The Linear values are derived from the measured length of Sironj base, assumed as log. feet 4.5844824, through the karachi longitudinal series.
The heights are referrible to mean sea level at Okha Tidal Station on the Gulf of Cutch.
The Longitudes are referrible to Madras Observatory, 80° 17' 21', to which a correction of - 2' 30 must be applied to reduce to the most recent value, viz : 80° 14' 51 Index to Adjoining Sections ,Sheet 48. 1 inch Scale |