With ________ you can find your precise location on a digital map if your device can receive signals from three satellites. A _________ map is a low-tech tool for visualizing the contours and elevations of a landform.
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The Global Positioning System (GPS) uses satellite signals to determine the location of an object.
A topographic map shows the surface features of a particular area such as hills, valleys, rivers, and mountains. To represent elevation and relief, topographic maps use contour lines.