Mapping Technology and Topographic Maps Chapter 1, Lesson 3 and 4.

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Presentation transcript:

Mapping Technology and Topographic Maps Chapter 1, Lesson 3 and 4

One bit of a digitized image, often appearing as a small square or dot. pixel

A navigation system that uses satellite signals to locate a radio receiver on Earth’s surface. Global Positioning System (GPS)

The difference in elevation from one contour line to the next. contour interval

A system of computer hardware and software used to produce interactive maps. Geographic Information System

A photograph taken by cameras mounted in airplanes. aerial photograph

Converting information to numbers for use by a computer. digitizing

A line on a topographic map that connects points of equal elevation. contour line

On a topographic map, a heavier contour line that is labeled with elevation of that contour line. index contour

A picture of the land surface based on computer data collected from satellites. satellite image

A map that shows the surface features of an area. topographic map

The process of gathering data for a map by using instruments and the principles of geometry to determine distance and elevations. surveying