| A | B |
|---|
| contour interval | the difference in elevation between one contour line and the next |
| contour line | a line that connects points of equal elevation |
| elevation | the height of an object above sea level |
| equator | the imaginary circle halfway between the poles that divides the Earth into the Northern and Southern Hemispheres |
| latitude | the distance North or South from the equator, expressed in degrees |
| longitude | the distance east and west from the prime meridian; expressd in degrees |
| magnetic declination | the difference between magnetic north and true north |
| map | a representation of the features of a physical body such as Earth |
| prime meridian | the meridian or line of longitude that is designated as zero degrees longitude |
| topographic map | a map that shows the surface features of Earth |
| cartographer | one who makes maps |
| 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 of Earth from space |
| hemisphere | an equal division of Earth's surface into northern and southern halves or eastern and western halves |
| map scale | on a map, the comparison of distance units used with actual distances on Earth's surface; may be expressed as a ratio, a fraction, or in a scale bar |
| projection | a representation of the spherical Earth on the flat plane on a map |
| radar | a method of detecting distant objects and recording their features and properties by analysis of electromagnetic waves reflected from their surfaces |
| slope | the steepness of a landscape, calculated as the change in elevation divided by the distance covered |
| topography | all natural and human-made surface features of a particular area |
