Nautical mile 1 sea mile", followed by "For most practical purposes distance is measured from the latitude scale, assuming that one minute of latitude equals one nautical mile". One tenth of a nautical mile is a cable length. The derived unit of speed is the knot, defined as one nautical mile per hour. The metre was originally defined as of the meridian arc from the North pole to the equator passing through Dunkirk. The Earth’s circumference is therefore approximately 40,000 km. The equatorial circumference is slightly longer than the polar circumference – the measurement based on this (40,075.017 km x x =
Indian units of measurement maps at 1:50000 scale. Personally seen on the Punjab but assumed to be used in the whole of India. "Conversion" 1 Inch = Span of 6 Barley corns side by side by thickness, although barleycorns are not a reliable standard of measurement.<br> 1 Inch = 2.54 centimetres<br> 1 Foot = 30.48 cm<br> 1 Yard = 0.914 metre<br> 1 Mile = 1.61 Kilometre 1 coss= 2000 yards Indian units of measurement Before the introduction of the Metric system, one may divide the history of Indian systems of measurement into three main periods: the pre-Akbar's period, the period of the Akbar system,