🗺️ Indian Geography — Chapter 01

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📌 India at a Glance
32,87,263
Area (km²)
2.43%
World's Land Area
17.5%
World Population (2011)
17.76%
World Population (2024)
7th
World Rank by Area
📐 Latitudinal & Longitudinal Extent
  • Mainland Latitude: 8°4'N to 37°6'N
  • With Islands (entire India): 6°4'N to 37°6'N
  • Longitude: 68°7'E to 97°25'E
  • Hemisphere: Northern & Eastern
🏛️ Administrative Units
  • States: 28
  • Union Territories: 8
North → South 3,214 km
East → West 2,933 km
📏 Boundary Lengths
15,200 km
Land Boundary
6,100 km
Mainland Coast
11,098.81 km
Total Coast (incl. Islands) — Present
7,516.6 km
Earlier Coastal Length
⚡ QUICK RECALL
Southern boundary of mainland = Kanyakumari (8°4' N), Tamil Nadu
🏆 World Area Ranking
Top 10 Countries by Area
  • 1
    Russia
  • 2
    Canada
  • 3
    USA
  • 4
    China
  • 5
    Brazil
  • 6
    Australia
  • 7
    India 🇮🇳
  • 8
    Argentina
  • 9
    Kazakhstan
  • 10
    Algeria
🚨 EXAM TRAP
India is the seventh-largest country by area and, since 2023, the most populous country, having overtaken China. Do not confuse the area and population rankings.
🧭 India's Four Extremities
⬆️ Northernmost Point
  • Indira Col
  • Location: Ladakh
  • Latitude: 37°6' N
⬇️ Southernmost Point
  • Indira Point (Pygmalion Point)
  • Location: Great Nicobar Islands
  • Latitude: 6°4' N
⬅️ Westernmost Point
  • Guhar Moti (Gauhar Moti)
  • Location: Gujarat
  • Longitude: 68°7' E
➡️ Easternmost Point
  • Kibithu
  • Location: Arunachal Pradesh
  • Longitude: 97°25' E
🚨 EXAM TRAP
🕐 Indian Standard Time (IST)
82½° East — Standard Time Meridian
  • IST = 82°30' East (82½°E)
  • Passes through: Mirzapur, Prayagraj (Uttar Pradesh)
5 States Crossed by IST Line:
Uttar Pradesh
Madhya Pradesh
Chhattisgarh
Odisha
Andhra Pradesh
⏱️ Time Difference (Gujarat vs AP)
  • Longitude difference: 30°
  • Time difference: 2 hours
  • Formula: 1° = 4 minutes → 30° = 120 min = 2 hrs
🌍 Countries with Most Time Zones
  • France: 12 (Most in world)
  • Russia: 11
  • USA (mainland): 4
⚡ QUICK RECALL
IST = GMT + 5:30 | IST Line origin city = Mirzapur (UP) | Passes through 5 states
🌐 Land Border Countries
Country Border Length Border Line Name Indian States/UTs
Bangladesh 🇧🇩 4,096 km (longest) Radcliffe Line West Bengal, Assam, Meghalaya, Tripura, Mizoram
China 🇨🇳 3,485 km McMahon Line Ladakh, Uttarakhand, HP, Arunachal Pradesh, Sikkim
Pakistan 🇵🇰 3,323 km Radcliffe Line Ladakh, J&K, Punjab, Rajasthan, Gujarat
Nepal 🇳🇵 1,751 km — UP, Bihar, Uttarakhand, West Bengal, Sikkim
Myanmar 🇲🇲 1,643 km — Arunachal Pradesh, Nagaland, Manipur, Mizoram
Bhutan 🇧🇹 699 km — Arunachal Pradesh, Assam, West Bengal, Sikkim
Afghanistan 🇦🇫 106 km (shortest) Durand Line Ladakh (PoK)
🚨 EXAM TRAP
🌊 Water / Maritime Boundaries
Sea Neighbours
  • Sri Lanka — Palk Strait (SE coast of Tamil Nadu)
  • Maldives — 8° Channel
  • Thailand & Indonesia — Great Channel
⚡ QUICK RECALL
Ram Setu— Tamil Nadu coast and Sri Lanka between. Land & Maritime boundary both with:Bangladesh, Myanmar, Pakistan
🌏 Indian Subcontinent Countries
India
Pakistan
Nepal
Bhutan
Bangladesh
🚫 Landlocked States (No International/Maritime Border)
Haryana
Madhya Pradesh
Chhattisgarh
Telangana
Jharkhand
🗺️ States and Their International Borders
State/UT Shares Border With
Gujarat, Rajasthan, Punjab, J&K, Ladakh Pakistan
Himachal Pradesh China
Uttarakhand China (Tibet) + Nepal
Uttar Pradesh + Bihar Nepal
West Bengal Nepal + Bhutan + Bangladesh
Assam Bhutan + Bangladesh
Arunachal Pradesh China + Myanmar + Bhutan
Manipur + Nagaland Myanmar
Mizoram Bangladesh + Myanmar
🤝 States Bordering 3 Countries
Arunachal Pradesh
Bhutan
China
Myanmar
Sikkim
Bhutan
Nepal
China
Ladakh (UT)
China
Afghanistan
Pakistan
Tripura (Special)
  • Bangladesh is bordered by India on three sides.
🔢 States by Number of Neighbours
Most State Borders
State No. of Neighbours Neighbours
Uttar Pradesh 8 States + 1 UT (Delhi) Uttarakhand, CG, Haryana, Bihar, Delhi, Jharkhand, RJ, MP
Assam 7 States WB, Meghalaya, AP, Nagaland, Manipur, Mizoram, Tripura
Karnataka 6 States Kerala, TN, AP, Telangana, Maharashtra, Goa
West Bengal 5 States Sikkim, Assam, Bihar, Jharkhand, Odisha
Andhra Pradesh 5 States TN, Karnataka, Telangana, Chhattisgarh, Odisha
Odisha 4 States WB, Jharkhand, Chhattisgarh, AP
⚡ QUICK RECALL — Bihar Connection
Bihar borders Uttar Pradesh, Jharkhand and West Bengal, and shares an international boundary with Nepal. This is frequently tested in Bihar examinations.
🚨 EXAM TRAP
India shares Sundarbans with Bangladesh. UP borders 9 units total(8 states + 1 UT Delhi) — the highest.
🌊 Coastal States — 9 States
Gujarat
Longest Coastline (State)
A&N Islands
Longest Coastline (UT)
9
States with Coastline
4
UTs with Sea Coast
🌅 West Coast States
State Length
Gujarat 1,214.70 km
Maharashtra 652.60 km
Kerala 569.70 km
Karnataka 300 km
Goa 101 km
🌄 East Coast States
State Length
Andhra Pradesh 973.70 km
Tamil Nadu 906.90 km
Odisha 476.40 km
West Bengal 157.50 km
🏝️ Union Territories with Sea Coast (4)
UT Coastline
Andaman & Nicobar Islands 1,962 km (longest UT)
Lakshadweep 132 km
Puducherry 47.6 km
Dadra & NH and Daman & Diu 42.5 km
Source: Ministry of Ports, Shipping and Waterways
🚨 EXAM TRAP
☀️ Tropic of Cancer (23½° N)
8 States Crossed — West to East
1. Gujarat
2. Rajasthan
3. Madhya Pradesh
4. Chhattisgarh
5. Jharkhand
6. West Bengal
7. Tripura
8. Mizoram
⚡ QUICK RECALL — Memory Trick
G R M C J W T M → Gujarat, Rajasthan, MP, CG, Jharkhand, WB, Tripura, Mizoram
🔀 IST Line & Tropic of Cancer Intersection
  • The Tropic of Cancer and the Indian Standard Meridian intersect in Koriya district near Sonhat, Chhattisgarh.
🏙️ State Capitals — North vs South of Tropic
⬆️ North of Tropic of Cancer
  • Jaipur (Rajasthan)
  • Agartala (Tripura)
  • Aizawl (Mizoram)
⬇️ South of Tropic of Cancer
  • Gandhinagar (Gujarat)
  • Bhopal (MP)
  • Raipur (Chhattisgarh)
  • Ranchi (Jharkhand)
  • Kolkata (West Bengal)
🚨 EXAM TRAP
⚡ MASTER QUICK RECALL — Ch01 Summary
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