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HomeHomework HelpgeographyMap Projections

Map Projections

The methods and techniques used to represent the Earth's surface on a two-dimensional map, including the challenges and limitations of representing a three-dimensional object in two dimensions

intermediate
2 hours
Geography
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Overview

Map projections are essential tools in geography that allow us to represent the three-dimensional Earth on two-dimensional surfaces. Each projection has its unique characteristics, which can distort various aspects such as area, shape, and distance. Understanding these distortions is crucial for int...

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Key Terms

Cylindrical Projection
A type of map projection where the surface of the Earth is projected onto a cylinder.

Example: The Mercator projection is a well-known cylindrical projection.

Conic Projection
A map projection that represents the Earth’s surface on a cone.

Example: The Albers Equal-Area Conic projection is often used for maps of the United States.

Azimuthal Projection
A projection that shows the Earth from a specific point, typically from above.

Example: The Stereographic projection is an azimuthal projection used in polar maps.

Distortion
The alteration of the original shape or size of an object when represented on a map.

Example: All map projections distort some aspect of reality.

Scale
The ratio of a distance on the map to the corresponding distance on the ground.

Example: A scale of 1:100,000 means 1 unit on the map equals 100,000 units in reality.

Equal-Area Projection
A projection that maintains the area of features but may distort shape.

Example: The Peters projection is an equal-area projection.

Related Topics

Geographic Information Systems
GIS involves the analysis and visualization of spatial data, often using various map projections.
advanced
Cartography
The art and science of map-making, including the design and creation of maps.
intermediate
Spatial Analysis
The study of geographic patterns and relationships using spatial data.
intermediate

Key Concepts

Types of ProjectionsDistortionUse CasesScale