| A | B |
|---|
| map | a representation of features |
| cardinal directions | north, south, east, and west |
| reference point | a fixed place on the earth's surface from which direction and location can be described |
| true north | the direction to the geographical North Pole |
| magnetic declination | the difference between the geographic and magnetic poles |
| lines of lattitude | parallel lines that run east to west, but are measured north and south |
| lines of longitude | meridians that run north to south but are measured east to west |
| distortions | changes in the accuracy of a map caused by moving information from a globe to a flat surface |
| cylindrical projection | mercator projection |
| conic projection | map projection made when transfering contents of a globe onto a cone |
| azimuthal projection | used to map areas that are near the poles |
| equal area projection | a conic, cylindrical, or azimuthal projection used to map a larg area of land |
| remote sensing | a way to collect information about something without physically being there |
| GPS | a system of orbiting satellites that send radio signals to receivers on the Earth |
| GIS | a computerized system that allows a user to enter different types of information about an area |
| topographic map | a map that shows surface features |
| elevation | the height of an object above sea level |
| contour lines | lines that connect points of equal elevation |
| contour interval | the difference in elevation from one contour line to another |
| relief | the distance in elevation from the highest and lowest points being mapped |
| index contour | darker, heavier line that indicates a change in elevation |
