| A | B |
|---|
| cartographer | a person who makes maps |
| contour interval | the difference in elevation between two consecutive contour lines |
| contour line | lines on a topographic map showing elevation of land above or below sea level, all points connected by a line having the same elevation |
| equator | the imaginary line dividing Earth's surface into Northern and Southern hHemispheres; establishes 0 degrees latitude |
| false-color image | a computer image that assigns distinctive colors to different wavelengths of light reflected from a distant object, delineating surface features; used frequently in satellite images from space |
| hemisphere | an equal division of Earth's surface into nothern and southern halves or eastern and western halves. |
| latitude | east-west lines parallel to the equator used to measure distance in degrees north and south, from 0 degrees at the equator to 90 degrees at the poles |
| longitude | north-south lines running between the poles, used to measure distance in degrees east and west of the prime meridian; from 0 degrees at the prime meridian to 180 degrees east or west |
| map | a flat, 2-dimensional representation of Earth's surface |
| map scale | the comparicon of distance units used with actual distances on Earth's surface; may be expressed as a ratio, a fraction, or a scale bar |
| prime meridan | the imaginary line dividing Earth's surface into Eastern and Western Hemispheres, estalished as 0 degrees at Greenwich, England |
| projection | a representation of the spherical Earth on the flat plane of a map. |
| radar | a method of detecting distant objects and recording their features and properties by analysis of elecromagnetic waves reflected from their surfaces |
| slope | the steepness of a landscape, calculates as the change in elevation (rise) divided by the distance covered (over run) |
| topographic map | a map that used contour lines and symbols to show the surface features of a particular area, includes natural features as well as human-made features. |
| topography | al natural and man-made surface features of a particular area |
| Mercator | projection of Earth's equator; polar regions distorted |
| Gnomonic | projection used often for polar area maps |
| Polyconic | projection used most often for middle latitude maps |
