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Geography: Class 11 (Part 1) — Chapter 1: India – Location

Introduction and Location Extent

India's geographical location is vital to its geopolitical and physical identity. The mainland of India extends from Kashmir in the north to Kanniyakumari in the south, and from Arunachal Pradesh in the east to Gujarat in the west.

Latitudinal and Longitudinal Extent

  • The mainland of India lies entirely in the Northern and Eastern hemispheres.
  • The latitudinal extent of the mainland is from 8°4' N to 37°6' N.
  • The longitudinal extent is from 68°7' E to 97°25' E.
  • The southern boundary extends further south to 6°45' N latitude in the Bay of Bengal (at Great Nicobar).
  • India's territorial limit extends towards the sea up to 12 nautical miles (approximately 21.9 km) from the coast.
Unit MeasureEquivalent Value
Statute mile63,360 inches
Nautical mile72,960 inches
1 Statute mile~1.6 km (1.584 km)
1 Nautical mile~1.8 km (1.852 km)

Implications of Extent

The latitudinal and longitudinal distance of India is roughly 30 degrees, yet the actual distance from North to South is 3,214 km, while East to West is only 2,933 km.

  • The distance between longitudes decreases towards the poles, whereas the distance between latitudes remains constant everywhere.
  • The southern part of India lies within the tropics, while the northern part lies in the sub-tropical or warm temperate zone, causing variations in climate, soil, and vegetation.
  • The 30-degree longitudinal difference causes a time difference of nearly two hours between the easternmost and westernmost parts of India.
Standard Meridian and Time Zones

Indian Standard Time (IST)

To avoid confusion across different longitudes, a standard meridian is selected for the entire country.

  • The 82°30' E longitude has been selected as the Standard Meridian of India.
  • Indian Standard Time (IST) is ahead of Greenwich Mean Time (GMT) by 5 hours and 30 minutes.
  • The standard meridian is chosen in multiples of 7°30' of longitude.
$$\text{Time Difference} = 30^\circ \times 4 \text{ minutes/degree} = 120 \text{ minutes} = 2 \text{ hours}$$
Size and Physical Diversity

Dimensions and Coastline

  • India has an area of 3.28 million sq. km, accounting for 2.4 percent of the world's land surface area.
  • It is the seventh largest country in the world.
  • The mainland coastline measures 6,100 km.
  • The total coastline, including Andaman & Nicobar and Lakshadweep islands, is 7,517 km.

The Indian Subcontinent

India, along with its neighboring countries, forms a distinct geographical entity known as the Indian Subcontinent due to its physical isolation by formidable barriers like the Himalayas.

  • It includes the countries of Pakistan, Nepal, Bhutan, Bangladesh, and India.
  • Mountain passes like Khyber, Bolan, Shipkila, Nathula, and Bomdila historically provided limited access through these barriers.
India and its Neighbours

Geopolitical Location

India is located in the south-central part of Asia, bordering the Indian Ocean and its two arms: the Arabian Sea to the west and the Bay of Bengal to the east.

  • Sri Lanka and Maldives are two island neighbors in the Indian Ocean.
  • Sri Lanka is separated from India by the Gulf of Mannar and the Palk Strait.