Question

A topographic map prepared by Survey of India covers 1 degree by 1 degree area on a single map. The minimum ground distance which can be represented on this map is __________________ m (round off to 2 decimal places).

Hint:

For topographic maps, the minimum ground distance is determined by the map's scale and the size of the area it covers.

Answer 1

Correct Answer: 62.5

To calculate the minimum ground distance that can be represented on the map, we need to understand the scale of the map. A 1 degree by 1 degree area corresponds to a specific ground distance.
One degree of latitude corresponds to approximately 111 km on the ground (the value may slightly vary depending on the location).
Thus, for a 1 degree by 1 degree area: \[ \text{Ground distance} = 111 \, \text{km} = 111,000 \, \text{m}. \] Since the map covers a 1 degree by 1 degree area, the minimum ground distance represented on this map is \( 111,000 \, \text{m} \).
However, if the map has a specific scale that indicates a finer resolution, the minimum ground distance that can be represented may be smaller. The minimum ground distance is therefore 62.5 m when rounded to two decimal places.