Geography
India: Location and Physiography
India: Location and Extent
India's latitude-longitude extent, area and rank, Standard Meridian, Tropic of Cancer states, land borders and neighbours for CGPSC Prelims and Mains.
Prerequisites
- Basic idea of latitude, longitude and time: 15° of longitude = 1 hour, so 1° = 4 minutes.
- Chhattisgarh: Location, Extent and Boundaries — the state version of this page; read them as a pair.
The Hook: Where Two Lines Cross in Surguja
Connect
India has one clock for the whole country, set by a single line of longitude: 82°30′ E. Across the northern hills of Chhattisgarh, the same line runs close to another famous line, the Tropic of Cancer (कर्क रेखा). Only two states, Madhya Pradesh and Chhattisgarh, are crossed by both.
Why did India pick 82°30′ E? Why does the sun rise in Arunachal about two hours before it rises in Kachchh? And why does India’s “official” coastline suddenly read 11,098 km instead of 7,516 km? This page answers all three.
Why it matters: Prelims loves exact numbers here (extent, area rank, border lengths, states on the Tropic and the meridian). Mains GS-III uses location to explain India’s climate, its strategic place in the Indian Ocean and its regional ties.
Latitude and Longitude Extent
| Item | Value |
|---|---|
| Latitudinal extent (mainland) | 8°4′ N to 37°6′ N |
| Longitudinal extent | 68°7′ E to 97°25′ E |
| Span | About 29° latitude and 29° longitude |
| North–south length | About 3,214 km (Kashmir to Kanyakumari) |
| East–west width | About 2,933 km (Arunachal Pradesh to Gujarat) |
| Hemispheres | Entirely in the northern and eastern hemispheres |
| Southernmost point of India | Indira Point (about 6°45′ N), Great Nicobar Island |
| Southernmost point of the mainland | Kanyakumari (Cape Comorin), about 8°4′ N |
Why does a 29° x 29° country look taller than it is wide?
Both spans are about 29°, yet the north–south distance (3,214 km) is greater than the east–west distance (2,933 km). The reason is that lines of longitude converge towards the poles, so a degree of longitude covers fewer kilometres at higher latitudes, while a degree of latitude stays about 111 km everywhere.
Extreme points (as given by the Government of India)
| Direction | Point | State / UT |
|---|---|---|
| North | Indira Col (Siachen region) | Ladakh |
| South | Indira Point | Andaman and Nicobar Islands |
| South (mainland) | Kanyakumari | Tamil Nadu |
| East | Kibithu–Dong area, Anjaw district | Arunachal Pradesh |
| West | Guhar Moti, Kachchh | Gujarat |
Area and Rank
- Area: about 32.87 lakh km² (3.287 million km²), roughly 2.4% of the world’s land area.
- Rank: 7th largest country, after Russia, Canada, the USA, China, Brazil and Australia.
- Largest state: Rajasthan. Chhattisgarh: 1,35,192 km², about 4.1% of India, the 9th largest state.
- Political units: 28 states and 8 Union Territories (as of 2026).
Standard Meridian and Indian Standard Time
| Point | Detail |
|---|---|
| Indian Standard Meridian | 82°30′ E |
| Passes near | Mirzapur (Uttar Pradesh) |
| IST vs GMT/UTC | 5 hours 30 minutes ahead (82.5 × 4 min = 330 min) |
| States it passes through | 5: Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Odisha, Andhra Pradesh |
| East–west time gap | About 2 hours (about 30° of longitude × 4 min) |
Why 82°30′ E?
Standard meridians are usually chosen as multiples of 7°30′ so that the standard time differs from GMT by a whole number of half-hours. 82°30′ E is such a multiple (7.5 × 11) and lies near the middle of India’s longitudinal spread. The demand for a separate time zone for the North-East (where daylight comes very early) recurs in debates, but India still follows one IST.
The Tropic of Cancer
The Tropic of Cancer (23°30′ N) divides India into almost two equal halves: the southern half lies in the tropical zone, the northern half in the sub-tropical zone.
It passes through 8 states, west to east:
| # | State | # | State |
|---|---|---|---|
| 1 | Gujarat | 5 | Jharkhand |
| 2 | Rajasthan | 6 | West Bengal |
| 3 | Madhya Pradesh | 7 | Tripura |
| 4 | Chhattisgarh | 8 | Mizoram |
Chhattisgarh angle
Chhattisgarh is crossed by both the Tropic of Cancer and the Standard Meridian. The Tropic runs through the northern districts (Manendragarh-Chirmiri-Bharatpur, Koriya, Surajpur and Balrampur, as of 2026). Details are on the Chhattisgarh location page.
Land Frontier and Neighbours
India’s land border is about 15,106.7 km (Ministry of Home Affairs figure). It touches seven countries:
| Neighbour | Border length (km) | Indian states / UTs on the border |
|---|---|---|
| Bangladesh | 4,096.7 (longest) | West Bengal, Assam, Meghalaya, Tripura, Mizoram |
| China | 3,488 | Ladakh, Himachal Pradesh, Uttarakhand, Sikkim, Arunachal Pradesh |
| Pakistan | 3,323 | Gujarat, Rajasthan, Punjab, Jammu and Kashmir, Ladakh |
| Nepal | 1,751 | Uttarakhand, Uttar Pradesh, Bihar, West Bengal, Sikkim |
| Myanmar | 1,643 | Arunachal Pradesh, Nagaland, Manipur, Mizoram |
| Bhutan | 699 | Sikkim, West Bengal, Assam, Arunachal Pradesh |
| Afghanistan | 106 (shortest) | Ladakh (through the area under Pakistan’s occupation) |
Maritime neighbours: Sri Lanka (across the Palk Strait and Gulf of Mannar) and the Maldives (south of Lakshadweep). Indonesia, Thailand and Myanmar share maritime boundaries in the Andaman Sea region.
Water bodies and channels
| Feature | Separates |
|---|---|
| Palk Strait | Tamil Nadu and Sri Lanka |
| Adam’s Bridge (Ram Setu) | Chain of shoals between Pamban (Rameswaram) and Mannar |
| Ten Degree Channel | Andaman group from the Nicobar group |
| Duncan Passage | South Andaman from Little Andaman |
| Nine Degree Channel | Minicoy from the main Lakshadweep group |
| Eight Degree Channel | Minicoy (India) from the Maldives |
Coastline: The Old and the New Figure
| Figure | Source and basis |
|---|---|
| 7,516.6 km | The long-used figure (mainland about 6,100 km + islands). Computed in the 1970s from coarse maps (scale 1:45,00,000) |
| 11,098.81 km | Re-measured by the National Hydrographic Office with the Survey of India at a finer scale (1:2,50,000) using GIS and the High-Water Line. Accepted after concurrence of coastal states and promulgated by the Ministry of Ports, Shipping and Waterways (circular of 29 April 2025) |
- The coastline did not “grow”. A finer scale captures more bends, creeks and islands; this is the coastline paradox.
- Gujarat has the longest coastline in both counts (revised figure 2,340.62 km).
- Exam tip: if a question’s options include only 7,516.6 km, answer that. If they include 11,098.81 km, the question is testing the 2025 revision.
Significance of India’s Location (for Mains)
- Central in the Indian Ocean: The peninsula juts about 1,600 km into the Indian Ocean, between West Asia and East/South-East Asia. The Indian Ocean is the only ocean named after a country.
- Trade routes: The Suez Canal (1869) and the Strait of Malacca sea lanes pass close to India; this underlies port-led development under the Sagarmala Programme and the SAGAR (Security and Growth for All in the Region) vision.
- Land routes: Himalayan passes historically linked India with Central Asia and Tibet (ideas, Buddhism, trade).
- Climate: The Tropic of Cancer and the Himalayan wall together give India a tropical monsoon type of climate, even in its sub-tropical north. See Climate.
- Strategic islands: Andaman and Nicobar overlooks the Strait of Malacca; Lakshadweep overlooks the Arabian Sea routes.
- Chhattisgarh’s landlocked position: As a central, landlocked state, it depends on east-coast ports (Visakhapatnam, Paradip) for exports such as Bailadila iron ore.
Memory Tricks
Extent: '8-37, 68-97'
Latitude 8 to 37, longitude 68 to 97. Add the “minutes” in pairs: 8°4′ – 37°6′ and 68°7′ – 97°25′ (“4-6, 7-25”).
Tropic of Cancer states: 'Good Rice Makes Chhattisgarh Joyful; West Tripura Munches'
Gujarat, Rajasthan, Madhya Pradesh, Chhattisgarh, Jharkhand, West Bengal, Tripura, Mizoram, west to east.
Standard Meridian states: 'U-M-C-O-A'
Uttar Pradesh, Madhya Pradesh, Chhattisgarh, Odisha, Andhra Pradesh, north to south. Chhattisgarh sits in the middle of both lists.
Border lengths: 'Bangla China Pakistan Nepal Myanmar Bhutan Afghan'
Descending order: Bangladesh > China > Pakistan > Nepal > Myanmar > Bhutan > Afghanistan. “Big Countries Protect National Maps; Borders Add up.”
Don’t Confuse
| This | vs | That |
|---|---|---|
| Indira Point — southernmost point of India (Great Nicobar) | vs | Kanyakumari — southernmost point of the mainland |
| Indira Point (south) | vs | Indira Col (north, Siachen) |
| Ten Degree Channel — Andaman vs Nicobar | vs | Nine Degree / Eight Degree — Lakshadweep side |
| Palk Strait (water) | vs | Adam’s Bridge (shoals) |
| 7,516.6 km coastline (old) | vs | 11,098.81 km (revised 2025) |
Common Mistakes
MCQ traps
- “The Tropic of Cancer passes through Odisha.” False. It passes through Jharkhand and West Bengal to the north of Odisha. Odisha is on the Standard Meridian list, not the Tropic list.
- “Longest land border is with China / Pakistan.” False. It is with Bangladesh (4,096.7 km).
- “The Standard Meridian passes through Jharkhand.” False. The five states are UP, MP, Chhattisgarh, Odisha and Andhra Pradesh.
- “India is the 6th largest country.” False. It is 7th; Australia is 6th.
- “North–south extent is less than east–west extent.” False. 3,214 km vs 2,933 km.
Practice
All questions below are original practice questions written in CGPSC style. They are not previous-year questions.
Level 1: Foundation
- India’s Standard Meridian is ______, and IST is ______ ahead of GMT.
- The country with which India shares its longest land border is ______.
- The channel that separates the Andaman Islands from the Nicobar Islands is the ______.
Answers
- 82°30′ E; 5 hours 30 minutes.
- Bangladesh (4,096.7 km).
- Ten Degree Channel.
Level 2: Prelims MCQs
Q1. Consider the following statements:
- Both the Tropic of Cancer and the Indian Standard Meridian pass through Chhattisgarh.
- The Indian Standard Meridian passes through Odisha.
- The Tropic of Cancer passes through Odisha.
Which of the statements given above is/are correct?
- (a) 1 only
- (b) 1 and 2 only
- (c) 2 and 3 only
- (d) 1, 2 and 3
Answer and explanation
(b) 1 and 2 only. Chhattisgarh is on both lists. The Standard Meridian (82°30′ E) passes through UP, MP, Chhattisgarh, Odisha and Andhra Pradesh, so statement 2 is correct. The Tropic of Cancer passes through Jharkhand and West Bengal, not Odisha, so statement 3 is wrong.
Q2. Match List I (Water body) with List II (What it separates):
| List I | List II |
|---|---|
| A. Palk Strait | 1. Minicoy and the Maldives |
| B. Ten Degree Channel | 2. Tamil Nadu and Sri Lanka |
| C. Eight Degree Channel | 3. Minicoy and the main Lakshadweep group |
| D. Nine Degree Channel | 4. Andaman and Nicobar groups |
- (a) A-2, B-4, C-3, D-1
- (b) A-2, B-4, C-1, D-3
- (c) A-4, B-2, C-1, D-3
- (d) A-2, B-1, C-4, D-3
Answer and explanation
(b) A-2, B-4, C-1, D-3. The Palk Strait lies between Tamil Nadu and Sri Lanka. The Ten Degree Channel separates Andaman from Nicobar. The Eight Degree Channel lies between Minicoy and the Maldives, and the Nine Degree Channel between Minicoy and the rest of Lakshadweep.
Q3. Arrange India’s neighbours in descending order of the length of their land border with India:
- Nepal 2. China 3. Myanmar 4. Pakistan
- (a) 2, 4, 1, 3
- (b) 4, 2, 1, 3
- (c) 2, 4, 3, 1
- (d) 4, 2, 3, 1
Answer and explanation
(a) 2, 4, 1, 3. China 3,488 km > Pakistan 3,323 km > Nepal 1,751 km > Myanmar 1,643 km. Bangladesh (4,096.7 km) is longest overall and Afghanistan (106 km) shortest, but neither is in this list.
Q4. India’s coastline was officially revised to about 11,098.81 km in 2025. The main reason for the increase was:
- (a) Land reclamation along the western coast
- (b) Inclusion of newly acquired islands
- (c) Measurement at a much finer map scale using GIS and the High-Water Line
- (d) Inclusion of the coastlines of inland lakes
Answer and explanation
(c). The old 7,516.6 km figure was computed in the 1970s at a coarse scale. The National Hydrographic Office and the Survey of India re-measured it at 1:2,50,000, capturing far more detail of the coastline. No territory was added; this is the coastline paradox.
Q5. Which one of the following states does not share a land border with Bangladesh?
- (a) Meghalaya
- (b) Mizoram
- (c) Manipur
- (d) Tripura
Answer and explanation
(c) Manipur. The five Bangladesh-border states are West Bengal, Assam, Meghalaya, Tripura and Mizoram. Manipur borders Myanmar.
Level 3: Mains Answer Writing
Q1. (150–200 words) Discuss how India’s location has shaped its climate, trade and strategic interests.
Model answer outline
- Intro: India lies wholly in the northern and eastern hemispheres (8°4′–37°6′ N, 68°7′–97°25′ E), at the head of the Indian Ocean, the only ocean named after a country.
- Body:
- Climate: Tropic of Cancer halves the country; the Himalayan wall blocks cold Central Asian winds, so even the north has a monsoon-type climate.
- Trade: Peninsula projects about 1,600 km into the ocean, close to the Suez–Malacca sea lanes; port-led growth under Sagarmala.
- Strategy: Andaman and Nicobar near the Strait of Malacca; Lakshadweep on Arabian Sea routes; SAGAR vision.
- Land links: Himalayan passes carried trade and Buddhism; today they are sensitive borders (China, Pakistan).
- Time: One IST at 82°30′ E despite a 2-hour sunrise gap; North-East time-zone debate.
- Chhattisgarh angle: Central, landlocked state crossed by both the Tropic and the Standard Meridian; depends on Visakhapatnam and Paradip ports for mineral exports.
- Conclusion: Location is a resource; maritime and continental strengths must be used together.
Quick Revision Table
| Fact | Detail |
|---|---|
| Latitude | 8°4′ N – 37°6′ N (mainland) |
| Longitude | 68°7′ E – 97°25′ E |
| N–S / E–W | About 3,214 km / 2,933 km |
| Area | About 32.87 lakh km²; 2.4% of world; 7th largest |
| Standard Meridian | 82°30′ E, near Mirzapur; IST = GMT + 5:30 |
| Meridian states | UP, MP, Chhattisgarh, Odisha, Andhra Pradesh |
| Tropic of Cancer states | Gujarat, Rajasthan, MP, Chhattisgarh, Jharkhand, WB, Tripura, Mizoram |
| Land border | About 15,106.7 km; longest Bangladesh, shortest Afghanistan |
| Coastline | 7,516.6 km (old); 11,098.81 km (revised, 2025) |
| Southernmost point | Indira Point (Great Nicobar) |
| Channels | Ten Degree (Andaman/Nicobar); Nine and Eight Degree (Lakshadweep side) |
Key Takeaways
Key Takeaways
- India spans about 29° of latitude and 29° of longitude, but is taller (3,214 km) than wide (2,933 km).
- IST is set on 82°30′ E; the line crosses five states including Chhattisgarh.
- The Tropic of Cancer crosses eight states; Chhattisgarh is on both lists.
- Bangladesh has the longest border with India, Afghanistan the shortest.
- The coastline figure changed in 2025 because of better measurement, not new land.
What’s Next
- The Himalayas — the northern mountain wall
- Indian Climate — what latitude and the Himalaya do to the monsoon
- Chhattisgarh: Physical Geography — the state on the same lines
- Drainage System of India — the rivers that built the plains and deltas
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