kik

It covers 9 million square kilometres (3,500,000 sq mi), 31% of the African continent.

To the south it is bounded by the Sahel, a belt of semi-arid tropical savanna around the Niger River valley and the Sudan region of sub-Saharan Africa.

The Sahara is so large and bright that, in theory, it could be detected from other stars as a surface feature of Earth, with near-current technology.

The highest peak in the Sahara is Emi Koussi, a shield volcano in the Tibesti range of northern Chad.

The central Sahara is hyperarid, with sparse vegetation.

In the 16th century, cartographers like Gerardus Mercator and Abraham Ortelius revolutionized mapmaking.

Cartography has advanced significantly with the advent of technology, particularly with the use of GIS (Geographic Information Systems).

Map projections are essential in cartography, as they enable us to visualize Earth's surface on a two-dimensional plane.

Cartographers consider factors like scale, orientation, and labeling when creating maps to ensure accuracy and clarity.

Cartography plays a crucial role in various fields, including navigation, urban planning, disaster management, and research.

The International Map of the World (IMW) is a collaborative effort among countries to create a standardized world map.

The predicted urban population growth is equivalent to approximately 3 billion urbanites by 2050, much of which will occur in Africa and Asia.

In the long term, urbanization is expected to significantly impact the quality of life in negative ways.

Urbanization can be seen as a specific condition at a set time (e.g.

Climate is determined by a location's latitude, longitude, terrain, altitude, land use, and nearby water bodies and currents.

Climate affects the ecosystem and human life in a region.

Climate zones are categorized based on temperature, precipitation, and other factors.

Climate change refers to long-term shifts in climate patterns, often caused by human activities.

Climate models help scientists predict future climate conditions.

Climate change impacts include rising sea levels, more frequent extreme weather events, and loss of biodiversity.

Ocean currents are classified by temperature as either warm currents or cold currents.

Drifts, such as the North Atlantic Drift Current, involve the forward movement of surface ocean water under the influence of the prevailing wind.

Currents, such as the Labrador Current, involve the movement of oceanic water in a more definite direction at a greater velocity than drifts.

Streams, such as the Gulf Stream, involve movement of larger masses of ocean water with greater velocity than drifts or currents.

Ocean currents are patterns of water movement that influence climate zones and weather patterns around the world.

The two basic types of currents – surface and deep-water currents – help define the character and flow of ocean waters across the planet.

In 2021, the world's population reached 7.9 billion people.

The world's population grows by approximately 2 million people per day.

Between 1950 and 2020, the world's population increased by 3 billion people.

The global life expectancy at birth is 72 years.

In 2021, the world's population density is 54 people per square kilometer.

Population pyramids illustrate the age and sex distribution of a population.

A map projection is essential for accurately representing Earth's surface on a flat map.

Coordinates are converted from latitude and longitude on the globe to plane coordinates in a projection.

The Mercator projection is widely used for navigation but distorts the size of countries near the poles.

Lambert projections are suitable for area representation but may distort shapes and distances.

Equirectangular projection is commonly used for satellite images and virtual tours, but distorts the perspective.

Projection is a necessary step in creating a two-dimensional map and is one of the essential elements of cartography.

The Himalayas are approximately 50 million years old.