Mapping Our World Vocab

process of gathering data about Earth from instruments far above the planet's surface

information-gathering satellite that uses visible light and infrared radiation to map surface

use of sound waves to detect and measure objects underwater

imaginary line that lies at 0 degrees latitude and circles Earth. 

a map that shows the distribution, arrangement, and types of rocks below the soil

difference in elevation between 2 side-by-side contour lines on a topographic map

the 180 degrees  meridian, which serves as the transition line for calendar days

ratio between the distances shown on a map and the actual distances on Earth's surfaces

line on a topographic map that connects points of equal elevation

a mapping system that uses worldwide databases from remote sensing to create layers of info

map with parallel lines of latitude and longitude that shows true direction 

data-gathering satellite that uses radar to map features on the ocean floorf

imaginary line representing 0 degrees longitude

used in plotting long trips by boat or plane, made by projecting points from globe to paper

science of mapmaking

distance in degrees east and west of the prime meridian.

distance in degrees north and south of the equator

key that explains what the symbols on a map represents

Map is highly accurate for small areas, made by projecting points and lines from globe to cone 

satellite-based navigation system that permits a user to pinpoint exact locations on Earth