💥Mains Ready By December. Smash Mains & Smash PYQ Admissions Open

Subject: World Geography:Map based Questions

  • Why a flat map fails to accurately depict Earth

    Why a flat map fails to accurately depict Earth

    Why in the News

    • The UN General Assembly has adopted a resolution encouraging a shift from the Mercator projection towards the Equal Earth projection.
    • 164 countries, including India, supported the resolution.
    • The United States voted against, while six countries abstained.
    • The resolution is non-binding.
    • The debate centres on how world maps represent the relative size of different regions, particularly Africa.

    What is a Map Projection?

    • A map projection converts the three-dimensional Earth into a two-dimensional map.
    • Every projection involves some form of distortion.
    • Four major properties are: Area, Shape, Distance, Direction
    • Major types include:
      • Conformal: Preserves local angles and shapes.
      • Equal-area: Preserves relative areas.
      • Equidistant: Preserves selected distances.
      • Compromise: Balances different types of distortion.

    Mercator Projection

    • Developed by Gerardus Mercator in 1569.
    • Designed mainly for navigation.
    • Meridians and parallels are represented as straight lines.
    • A constant compass bearing can be represented as a straight line.
    • It is a conformal projection.

    Major Limitation

    • Areas become increasingly exaggerated towards the poles.
    • Greenland and Antarctica therefore appear much larger than their actual relative size.
    • This can visually distort perceptions of the geographical size of regions.

    Equal Earth Projection

    • Developed in 2018.
    • It is an equal-area projection.
    • Preserves the relative area of landmasses.
    • Particularly useful for:
      • Population distribution
      • Climate data
      • Land-use mapping
      • Resource distribution
    • It sacrifices some accuracy in shape and distance.

    Which Projection for Which Purpose?

    • Navigation → Mercator or other conformal projections.
    • Statistical/thematic maps → Equal-area projections such as Equal Earth.
    • General world maps → Robinson or Winkel Tripel.
    • Polar regions → Azimuthal projections.

    Challenges

    • UN resolutions are not legally binding.
    • Digital mapping systems continue to rely heavily on Mercator-derived projections.
    • Changing a projection does not eliminate distortion; it only changes which property is prioritised.
    • Therefore, maps should clearly mention the projection and its principal purpose.

    Way Forward

    • Use projection according to purpose, rather than adopting one universal map.
    • Provide equal-area options in government statistical and mapping platforms.
    • Clearly mention the projection used on published maps.
    • Improve geographical literacy by teaching the limitations of different projections.

    Prelims Pointers

    • Compromise projections → Balance multiple distortions.
    • Mercator → Conformal projection.
    • Mercator → Developed in 1569.
    • Mercator’s major use → Navigation.
    • Equal Earth → Equal-area projection.
    • Equal-area projection → Preserves relative areas.
    • Geostationary ≠ Geosynchronous is a separate orbital concept, not a map projection.
    • No flat map → Can simultaneously preserve area, shape, distance and direction perfectly.
  • Venezuela Earthquake

    Why in News?

    A powerful doublet earthquake (Magnitude 7.2 followed by 7.5) struck Venezuela, killing over 188 people and injuring more than 1,500. It is the strongest earthquake to hit Venezuela in 126 years.

    Key Highlights

    • Two major earthquakes struck within one minute, making it a doublet earthquake.
    • Epicentres were located west of Caracas, near the coastal town of Morón.
    • Tremors were felt in Colombia and Brazil.
    • The earthquakes occurred at shallow depths (10 km and 22 km), resulting in severe ground shaking.
    • International humanitarian assistance was offered by India, the United States, the United Nations, China, Brazil, and others.

    Why Did the Earthquake Occur?

    • Plate Boundary: Venezuela lies along the boundary between the Caribbean Plate and the South American Plate.
    • Strike-slip Faulting: The Caribbean Plate moves eastward relative to the South American Plate, causing horizontal movement along faults.
    • Active Fault Zone: The earthquake occurred near the El Pilar Fault System, one of the most active fault systems in northern Venezuela.
    • Shallow-focus Earthquake: Shallow earthquakes release energy close to the Earth’s surface, leading to greater destruction.
    • Doublet Earthquake: Two large earthquakes occurring almost simultaneously amplify structural damage.

    Prelims Pointers

    • Earthquake: Sudden release of energy in the Earth’s crust due to movement along faults.
    • Focus (Hypocentre): Point inside the Earth where an earthquake originates.
    • Epicentre: Point on the Earth’s surface directly above the focus.
    • Shallow-focus earthquakes: Depth less than 70 km; generally cause maximum damage.
    • Strike-slip fault: Fault where two blocks move horizontally past each other.
    • Doublet earthquake: Two major earthquakes of similar magnitude occurring close together in time and location.

    [2023] Consider the following statements :
    1. In a seismograph, P waves are recorded earlier than S waves.
    2. In P waves, the individual particles vibrate to and fro in the direction of wave propagation whereas in S waves, the particles vibrate up and down at right angles to the direction of wave propagation.
    Which of the statements given above is/are correct?

    [A] 1 only

    [B] 2 only

    [C] Both 1 and 2

    [D] Neither 1 nor 2

  • Consider the following statements

    Consider the following statements:
    1. Ajman is one of the seven Emirates of the UAE.
    2. Ras al-Khaimah was the last Sheikhdom to join the UAE.

  • Match List I with List II and select the correct answer using the code given below the lists

    Match List I with List II and select the correct answer using the code given below the lists
    (Geographic feature) (Country)
    A. Great Victoria Desert 1. Australia
    B. Grand Canyon 2. Canada
    C. Lake Winnipeg 3. New Zealand
    D. Southern Alps 4. USA

  • Which one of the following pairs is not correctly matched

    Which one of the following pairs is not correctly matched ?

  • Consider the following countries

    Consider the following countries :
    1. Australia
    2. Namibia
    3. Brazil
    4. Chile
    Through which of the above does the Tropic of Capricorn pass ?

  • Consider the following pairs

    Consider the following pairs :
    Regions sometimes mentioned in news Country
    1. Catalonia – Spain
    2. Crimea – Hungary
    3. Mindanao – Philippines
    4. Oromia – Nigeria

    Which of the pairs given above are correctly matched?55555

  • Consider the following pairs

    Consider the following pairs:

    Sea Bordering country

    1. Adriatic Sea Albania
    2. Black Sea Croatia
    3. Caspian Sea Kazakhstan
    4. Mediterranean Sea Morocco
    5. Red Sea Syria

    Which of the pair given above are correctly matched?

  • Consider the following statements

    Consider the following statements :
    1. Vietnam has been one of the fastest growing economies in the world in the recent years.
    2. Vietnam is led by a multi-party political system.
    3. Vietnam’s economic growth is linked to its integration with global supply chains and focus on exports.
    4. For a long time Vietnam’s low labour costs and stable exchange rates have attracted global manufacturers.
    5. Vietnam has the most productive e-service sector in the Indo-Pacific region.
    Which of the statements given above are correct ?

  • Consider the following countries

    Consider the following countries:
    1. Bulgaria
    2. Czech Republic
    3. Hungary
    4. Latvia
    5. Lithuania
    6. Romania
    How many of the above-mentioned countries share a land border with Ukraine?