World Geography Glossary Find the definition of geography terms and phrases. (last part): Tropic of Capricorn A line of latitude located at 23°30' south. The Sun is directly overhead the Tropic of Capricorn on the summer solstice in the Southern Hemisphere (Dec. 20 or 21). It marks the southernmost point of the tropics. Arctic Circle A line of latitude located at 66°30' north, delineating the Northern Frigid Zone of the Earth. Antarctic Circle A line of latitude located at 66°30' south, delineating the Southern Frigid Zone of the Earth. globe The most accurate map of the Earth, duplicating its spherical shape and relative size. pole Point at which the earth turns; the north and south poles illustrate the axis on which the earth rotates. map Representation of a physical plane with selective information. Maps represent a definite area and contain detailed geographical information. atlas Combination of maps and charts. An atlas usually includes geographical information, as well as varied non-geographical information (population statistics, sea levels, etc.) about a particular location. compass A directional device that is made of a magnetic needle that synchronizes with the north and south poles. climate maps Give general information about the climate and precipitation (rain and snow) of a region. Cartographers, or mapmakers, use colors to show different climate or precipitation zones. economic or resource maps Feature the type of natural resources or economic activity that dominates an area. Cartographers use symbols to show the locations of natural resources or economic activities. For example, oranges on a map of Florida tell you that oranges are grown there. physical maps Illustrate the physical features of an area, such as the mountains, rivers and lakes. The water is usually shown in blue. Colors are used to show relief-differences in land elevations. Green is typically used at lower elevations, and orange or brown indicate higher elevations. political maps Do not show physical features. Instead, they indicate state and national boundaries and capital and major cities. A capital city is usually marked with a star within a circle. road maps Show major-some minor highways-and roads, airports, railroad tracks, cities and other points of interest in an area. People use road maps to plan trips and for driving directions. topographic maps Include contour lines to show the shape and elevation of an area. Lines that are close together indicate steep terrain, and lines that are far apart indicate flat terrain. map projections Two-dimensional representations of the three-dimensional Earth. Because projections attempt to present the spherical Earth on a flat plane, they inevitably produce distortions. Map projections are numerous and complex (e.g., there are a variety of cylindrical, conic, or azimuthal projections). Each projection has advantages and serves different purposes, and each produces different types of distortions in direction, distance, shape, and relative size of areas. One of the most famous projections is the Mercator, created by Geradus Mercator in 1569. It is a rectangular-shaped map in which all longitude and latitude lines are parallel and intersect at right angles (on a globe, meridians are not parallel, but grow narrower, eventually converging at the poles). Near the equator, the scale of the Mercator is accurate, but the farther one moves toward the poles, the greater the distortion—Antarctica in the far south and Greenland in the far north, for example, appear gigantic. The Mercator projection was used well into the 20th century, but has now been superseded by others, including the widely used Robinson projection. The Robinson projection is an elliptical-shaped map with a flat top and bottom. Developed in 1963 by Arthur H. Robinson, it is an orthophanic (“right appearing”) projection, which attempts to reflect the spherical appearance of the Earth. The meridians, for example, are curved arcs, which gives the flat map a three-dimensional appearance. But to convey the likeness of a curved, three-dimensional globe, the Robinson projection must in fact distort shape, area, scale, and distance. The Albers, Lambert, Mollweide, and Winkel Tripel are some of the other commonly used map projections.