AP Human Geography Maps, Projections, and Scales

Reference Maps

Maps that show general information about places, such as boundaries, landforms, and major physical or political features. They are used for navigation and understanding spatial relationships. They do not focus on data patterns but on accurate representation of locations.

Physical Maps

A type of reference map that shows natural features like mountains, rivers, deserts, and elevation. They help users understand the physical landscape of an area. These maps emphasize terrain rather than human-made boundaries.

Political Maps

A type of reference map that shows human-created boundaries such as countries, states, and cities. They highlight borders and governmental divisions. These maps are useful for understanding political organization and jurisdiction.

Topographic Maps

Maps that show elevation and landform shape using contour lines. They help users understand terrain, slope, and elevation changes. These maps are commonly used for hiking, engineering, and environmental planning.

Thematic Maps

Maps that display data or patterns about a specific topic, such as population density or climate. They emphasize the spatial distribution of information rather than physical features. These maps help identify trends and relationships across space.

Choropleth Map

A thematic map that uses colors or shading to represent data values across geographic areas. Darker or lighter shades indicate higher or lower values. They are useful for showing patterns like population density or election results.

Dot Density Map

A thematic map that uses dots to represent a certain quantity of something. Each dot represents a specific number of occurrences. These maps show distribution patterns and clustering.

Graduated Symbol Map

A thematic map that uses symbols of different sizes to represent varying quantities of data. Larger symbols indicate greater values. This map type helps compare data across locations.

Cartogram

A map in which the size of geographic areas is distorted based on a specific variable, such as population or economic output. Areas with larger values appear bigger on the map. Cartograms highlight the importance of data rather than physical size.

Isoline Map

A map that uses continuous lines to connect points of equal value, such as temperature or elevation. These lines show gradual changes across space. Weather maps commonly use isolines.

Flow-Line Map

A map that uses arrows or lines of varying thickness to show movement, such as migration, trade, or traffic. Thicker lines represent larger flows. These maps help visualize direction and volume of movement.

Mercator Projection

=A map projection that preserves direction, making it useful for navigation. However, it greatly distorts size, especially near the poles, making places like Greenland appear much larger than they are. It is commonly used in marine travel.

Gall-Peters Projection

A projection that preserves area, showing countries in their true relative sizes. However, it distorts shape, making landmasses appear stretched. It is often used to promote a more accurate representation of global equality.

Robinson Projection

A compromise projection that minimizes distortion of shape, size, and distance. It does not perfectly preserve any one property but provides a visually balanced world map. It is widely used in classrooms and atlases.

Goode Homolosine Projection

A projection that preserves area by splitting the oceans, creating an interrupted map. It reduces distortion on landmasses but makes the oceans appear disconnected. It is useful for studying global land patterns.

Polar/Azimuthal Projection

A projection centered on one of the poles, showing true direction from the center point. It distorts areas farther from the center. It is often used for air route planning in the polar regions.

Winkel Tripel Projection

A compromise projection that reduces distortion in area, direction, and distance. It is considered one of the most accurate overall world maps. National Geographic uses this projection.

Fuller Projection

A projection that displays the world as a series of connected triangles without traditional directions. It preserves shape and size well but is visually unfamiliar. It emphasizes global connectedness rather than orientation.

Conic Projection

A projection created by placing a cone over the Earth, best for mapping mid-latitude regions. It preserves shape and area well in these zones but distorts areas farther away. It is commonly used for regional maps.

Global Scale

A scale of analysis that examines patterns and processes across the entire world. It is used to study global issues like climate change, migration flows, and international trade. This scale provides broad, big-picture insights.

Regional Scale

A scale of analysis that focuses on a large area defined by shared characteristics, such as the Middle East or Latin America. It helps identify patterns within a specific part of the world. This scale is more detailed than global but still broad.

National Scale

A scale of analysis that examines patterns within a single country. It is used to study national policies, population trends, and economic development. This scale provides insights into how a country functions internally.

Local Scale

A scale of analysis that focuses on a small area such as a city, neighborhood, or community. It reveals detailed patterns and variations that larger scales may hide. This scale is useful for urban planning and community-level studies.

Large-Scale Map

A map that shows a small area with a high level of detail, such as a neighborhood or city block. Because the scale ratio is large (e.g., 1:5,000), features appear bigger and more precise. These maps are useful for zoning, property lines, and local planning.

Small-Scale Map

A map that shows a large area with very little detail, such as a country, region, or the entire world. Because the scale ratio is small (e.g., 1:1,000,000), features appear smaller and more generalized. These maps are useful for identifying broad patterns and global trends.