| A | B |
|---|
| Parallel | extending in the same direction, equidistant at all points, and never converging or diverging |
| Latitude | the angular distance north or south from the equator of a point on the earth's surface, measured on the meridian of the point |
| Meridian | a great circle of the earth passing through the poles and any given point on the earth's surface |
| Longitude | angular distance east or west on the earth's surface, measured by the angle contained between the meridian of a particular place and some prime meridian, as that of Greenwich, England, and expressed either in degrees or by some corresponding difference in time |
| Remote sensing | the technique or process of obtaining data or images from a distance, as from satellites or aircraft |
| Map projection | a projection of the globe onto a flat map using a grid of lines of latitude and longitude |
| Legend | a table on a map, chart, or the like, listing and explaining the symbols used |
| Scale | a succession or progression of steps or degrees; graduated series |
| Topography | the detailed mapping or charting of the features of a relatively small area, district, or locality |
| Elevation | the altitude of a place above sea level or ground level |
| Contour lines | line on a map that joins points of equal elevation |
| Relief | the differences in elevation and slope between the higher and lower parts of the land surface of a given area |
| Isogram | a line representing equality with respect to a given variable, used to relate points on maps, charts, etc |
| Equator | the great circle of the earth that is equidistant from the North Pole and South Pole |
